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Girodisc Ford S197 Mustang Rear Rings Refresh your Mustang’s braking system with Girodisc D2-081 rear replacement rings. Designed for the 328mm Girodisc two-piece rotor setup, these direct-fit rings bolt onto your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the wear surface to maintain lightweight performance and save on long-term maintenance costs. Vehicle Fitment Compatible with:• Ford Mustang GT (S197, 2005–2014, rear)• Ford Mustang Boss 302 (2012–2013, rear)• Ford Mustang Shelby GT500 (2007–2014, rear)Note: For use with Girodisc 328mm two-piece rear rotor systems only. Not compatible with OEM one-piece or carbon-ceramic rotors. Features • Sold as a left/right pair and includes full hardware kit• Direct replacements for Girodisc 328mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Curved directional vanes enhance airflow and reduce fade• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 328mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and full hardware kit• Sold/priced per pair Girodisc D2-081 Mustang Rear Replacement Ring FAQs Can I use these with factory Ford rotors or hats? No. The D2-081 rings are designed exclusively for Girodisc two-piece rotor systems and won’t fit OEM rotors or hats. Are these compatible with street and track pads? Yes. They work with all major pad brands, including Hawk, Ferodo, and G-LOC, for both street and track applications. How often should I replace Girodisc rings? Replacement frequency depends on driving style — typically every 3–5 track weekends or 20,000–30,000 street miles under spirited use. Do I need special torque specs when installing? Yes. Always follow Girodisc’s torque and Loctite specs for the included hardware to ensure proper float and long-term reliability. Upgrade your Ford Mustang’s braking performance with Girodisc D2-081 328mm rear replacement rings — engineered for strength, cooling, and consistent pedal feel on both the street and the track.

Girodisc Mitsubishi Evo 6–9 Rear Rings Bring your Mitsubishi Evolution’s braking system back to life with Girodisc D2-008 300mm rear replacement rings. These precision-engineered rings are designed as direct replacements for Girodisc two-piece rotors, allowing you to replace only the wear surface while reusing your existing Girodisc aluminum hats. Perfect for high-performance street and track builds, they deliver consistent braking force and superior cooling compared to factory rotors. Vehicle Fitment Compatible with:• Mitsubishi Lancer Evolution VI (1999–2001, rear)• Mitsubishi Lancer Evolution VII (2001–2003, rear)• Mitsubishi Lancer Evolution VIII (2003–2005, rear)• Mitsubishi Lancer Evolution IX (2006–2007, rear)Note: Designed exclusively for Girodisc 300mm two-piece rear rotor systems. Not compatible with OEM one-piece rotors or carbon-ceramic brake setups. Features • Sold as a left/right pair and includes full floating hardware kit• Direct replacements for Girodisc 300mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes improve cooling and fade resistance• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 300mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair Girodisc D2-008 Mitsubishi Evo 6–9 Rear Ring FAQs Are these compatible with factory Brembo calipers? Yes. The D2-008 rings retain OEM fitment and clearances for Evo VI–IX models with Brembo brake systems. Can I mix these with stock front rotors? It’s possible, but for optimal balance and cooling, Girodisc recommends upgrading all four corners for matched heat capacity and bias. How do these compare to OEM Evo rotors? Girodisc rotors are lighter, run cooler, and offer greater resistance to cracking or warping under repeated track use. What maintenance do they require? Inspect after every track event; replace rings when they reach minimum thickness or show excessive heat checking. Upgrade your Mitsubishi Evo’s braking performance with Girodisc D2-008 300mm rear replacement rings — engineered for durability, cooling, and consistent pedal feel on both road and track.

Girodisc Mitsubishi Evo 6–9 Rear Rotors Transform the braking response of your Mitsubishi Evolution with Girodisc lightweight two-piece rear rotors. Designed for Evo VI through Evo IX models, these precision-engineered rotors reduce unsprung weight, improve heat management, and deliver sharper pedal feel while maintaining factory brake balance and ABS function. Vehicle Fitment Compatible with:• Mitsubishi Lancer Evolution VI (1999–2001)• Mitsubishi Lancer Evolution VII (2001–2003)• Mitsubishi Lancer Evolution VIII (2003–2005)• Mitsubishi Lancer Evolution IX (2006–2007)Direct OEM replacement – bolts to factory hubs and calipers with no major modifications required. Note: Minor pad modification may be required for proper clearance (see below). Race-Proven Design with Everyday Reliability The Girodisc system replaces the OEM one-piece rotors with a fully floating two-piece design that improves cooling efficiency and reduces rotational mass. Each rotor hat is CNC-machined from U.S.-sourced 6061-T6 aircraft-grade aluminum and hard-anodized for strength and corrosion protection. The proprietary cast-iron rings are poured and machined in-house at Girodisc’s U.S. facility, using a curved vane design to draw air through the disc for superior heat dissipation under high-performance conditions. Features • Direct-fit upgrade for Mitsubishi Evo 6, 7, 8, and 9 rear brakes• Lightweight two-piece floating construction• CNC-machined 6061-T6 aluminum hats with hard-anodized finish• Proprietary cast-iron friction rings poured and machined in the USA• Curved vane design promotes airflow and reduces fade• Cadmium-plated drive pins resist corrosion and fatigue• Anti-noise spring washers allow controlled thermal expansion• Retains OEM parking brake functionality• Reduced unsprung and rotational weight (approx. 2.5 lbs lighter per rotor)• Sold/priced per pair Installation Note The OEM pads and some aftermarket brake pads require minor modification before installation to accommodate the Girodisc hardware and retain the factory parking brake. This involves lightly grinding the pad backing plate to match the arc of the pad material. Girodisc includes full instructions, and pads purchased directly from Girodisc are pre-modified for a plug-and-play fit. Girodisc A2-008 Rear Rotor FAQs: Do these fit directly on Evo 6–9 models? Yes. The Girodisc A2-008 rotors are designed specifically for these generations of the Mitsubishi Evolution and bolt directly to the OEM hub and calipers. Why do the pads need modification? The Girodisc floating design uses additional hardware that slightly changes the clearance between the caliper and rotor. Grinding the backing plate ensures proper fit while keeping the parking brake fully functional. How do these compare to OEM rotors? Girodisc rotors weigh less, run cooler, and can be rebuilt by replacing only the iron rings—offering long-term savings and improved braking performance. Are these suitable for track use? Absolutely. The floating two-piece construction and advanced cooling design make them ideal for aggressive street driving and track events. Upgrade your Evo’s rear braking system with Girodisc rotors for reduced weight, enhanced thermal control, and race-inspired precision built to handle your most demanding driving.

Girodisc Porsche 996, 997.1 Carrera Rear Rotors (Includes Spacers & Bolts) Boost the braking performance of your Porsche 996 or 997.1 Carrera with Girodisc’s lightweight two-piece rear rotors. This kit includes all necessary spacers and hardware, allowing a direct OEM installation while upgrading rotor diameter from 298mm to 325mm—improving cooling, braking leverage, and overall stopping consistency. Vehicle Fitment Porsche 996 Carrera / Carrera 4 / Carrera 4SPorsche 997.1 Carrera / Carrera SIncludes caliper spacers and bolts for installationDirect replacement – compatible with factory calipers and hardware Engineered for Porsche Precision The Girodisc system replaces the factory rotor with a larger, two-piece floating design engineered for performance and longevity. Each assembly pairs a CNC-machined 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction rings, both made in the USA. The curved internal vane structure acts as a centrifugal pump, forcing air through the rotor for enhanced cooling. With its increased rotor size and floating design, this upgrade delivers superior heat management and more consistent braking under repeated high-speed stops. Features • Direct OEM replacement – includes spacers and bolts• Increases rotor diameter from 298mm to 325mm• 6061-T6 billet aluminum hats, machined and anodized in the USA• Proprietary cast-iron friction rings poured and finished in-house• Floating mount design with cadmium-plated steel drive pins• Anti-noise spring washers eliminate rattle and manage heat expansion• Curved internal vane design maximizes airflow and cooling• Reduces unsprung and rotational mass for sharper handling• Maintains factory brake bias and ABS calibration• Fully rebuildable – replace only friction rings when needed• Sold/priced per pair Girodisc A2-033 Rear Rotor FAQs: Why is this rotor larger than stock? The Girodisc system increases diameter to 325mm, providing greater mechanical leverage and improved heat capacity for stronger, more consistent braking. Do I need to modify my calipers to fit these? No. The kit includes custom spacers and bolts that perfectly reposition the calipers for the larger rotors—no cutting or permanent changes required. Will these affect brake bias or ABS? Not at all. Girodisc engineers each system to maintain the factory balance and ABS performance while increasing cooling efficiency. Are they suitable for track or aggressive driving? Absolutely. The curved vane design and floating assembly deliver exceptional fade resistance and durability, making them ideal for spirited street or track use. Upgrade your Porsche’s stopping power with Girodisc rear rotors—engineered to bring race-level precision and confidence to your 996 or 997.1 Carrera.

Girodisc Ferrari 458, F12, FF, GTC4Lusso Rear Rotors Girodisc rear rotors for Ferrari’s most celebrated V8 and V12 models offer precision braking performance worthy of Maranello’s finest. Engineered as a direct OEM replacement, these rotors reduce unsprung weight, enhance heat control, and deliver a more consistent pedal feel under high-speed braking. Vehicle Fitment Ferrari 458 Italia / 458 Spider / 458 SpecialeFerrari F12berlinettaFerrari FFFerrari GTC4LussoCompatible with OEM calipers and factory hardware. Precision Engineering, Race-Inspired Design The Girodisc system bolts directly to the factory hubs—no modifications required. Each two-piece rotor combines a U.S.-sourced 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction ring, providing superior heat management and durability. The curved vane design acts as a centrifugal pump, moving cooling air through the rotor to stabilize temperatures during aggressive driving. This advanced construction ensures consistent brake torque and extended component life, whether on the street or circuit. Features • Direct OEM replacement – no adapters or modifications required• 6061-T6 billet aluminum hats, hard-anodized for corrosion resistance• Proprietary cast-iron friction rings, cast and machined in the USA• Floating mount system with cadmium-plated steel drive pins• Anti-noise spring washers prevent rattle while maintaining float• Curved vane internal design enhances airflow and cooling efficiency• Reduces unsprung mass for improved handling response• Fully rebuildable—replace only the friction rings when worn• Sold/priced per pair Girodisc A2-111 Rear Rotor FAQs: Are these rotors compatible with both V8 and V12 Ferrari models? Yes. They fit the 458, F12, FF, and GTC4Lusso using factory hardware and OEM calipers with no modifications required. Will these work with factory carbon ceramic brakes? No. These are designed for vehicles originally equipped with iron rotors. For PCCB conversions, a specific Girodisc kit is required. Do they improve braking feel? Absolutely. Expect better modulation, faster heat recovery, and improved pedal consistency thanks to reduced rotational mass and optimized cooling. Are they suitable for track use? Yes. Girodisc rotors are engineered to handle repeated high-temperature cycles typical of spirited track driving or heavy road use. Experience race-level braking performance in your Ferrari with Girodisc’s lightweight rear rotors—precision-built to balance power, control, and refinement.

AP Racing J Hook 410x36mm Replacement Front Brake Rotor Rings This is a pair of replacement front rotor rings with new hardware included. Center hat is not included, this kit is rotor rings and hardware only. Replacement discs only for AP Racing 13.01.20025 and 13.01.20029 rotors. Fits the Following Cars (w/ OEM PCCB rotors): Porsche 991 GT2RS PCCB (Front) Porsche 991 GT3 PCCB (Front) Porsche 991 GT3RS PCCB (Front) Porsche 718 GT4 PCCB (Front) Porsche 991 911 Turbo/TurboS (Front) Sold/priced per pair of rotor rings with hardware. AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knock back spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down. AP Racing by Essex 2-piece Competition J Hook front iron disc pair for 991 GT3/RS and 718 GT4/Spyder RS to replace PCCB discs. 410x36mm (16.14" x 1.40") Huge increase in airflow, cooling capacity, and durability vs. OEM PCCB discs Drastically less expense long-term running costs vs. PCCB Must use the standard front 991 GT3/RS pad shape used in the OEM iron rotors system Not compatible with OEM PCCB pad shape Over twice as many internal cooling vanes as the OEM PCCB's Weighs almost the same as the OEM 380x34mm iron discs, despite much larger size Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers and wheels, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knock Back Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knock back), AP Racing integrates anti-knock back spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and Preparation of AP Racing J Hook Discs Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

AP Racing 380x34mm Replacement J Hook Rotor Rings Replacement Disc Only For AP Racing 13.01.20017 Rotor discs and installation hardware only. Center hat excluded. Fits The Following Cars (w/ OEM Iron Rotors) Porsche 991 GT3 (Front) Porsche 991 GT3RS (Front) Porsche 981 GT4 (Front) AP Racing by Essex 2-piece Competition J Hook front disc pair for 981 GT4, 991.1 & 991.2 GT3 & GT3 RS with iron discs 380mm x 34mm (14.96" x 1.34") 72 Vane, D66 Huge increase in airflow, cooling capacity, and durability vs. OEM discs Saves 2 lbs. unsprung weight per side vs. OEM iron discs Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips Sold/priced per pair of rotor rings (including hardware). AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down. AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and Preparation of AP Racing J Hook Discs Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

AP Racing 410x36mm Two-Piece Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM PCCB Rotors) Porsche 991 GT2RS PCCB (Front) Porsche 991 GT3 PCCB (Front) Porsche 991 GT3RS PCCB (Front) Porsche 718 GT4RS/Spyder RS PCCB (Front) Sold/priced per pair. AP Racing by Essex 2-piece Competition J Hook front iron disc pair for 991 GT3/RS and 718 GT4RS / Spyder RS to replace PCCB discs. 410x36mm (16.14" x 1.40") Huge increase in airflow, cooling capacity, and durability vs. OEM PCCB discs Drastically less expense long-term running costs vs. PCCB Must use the standard front 991 GT3/RS pad shape used in OEM iron system (not compatible with OE PCCB pad shape) Over twice as many internal cooling vanes as the OEM PCCB's Weighs almost the same as the OEM 380x34mm iron discs, despite much larger size Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers and wheels, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down.   AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and preparation of AP Racing J Hook Disc Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

AP Racing by Essex 2-piece "S" Vane J Hook Front Brake Rotors (Front 408 x 34mm)- Porsche 992 GT3, GT3 RS Iron & PCCB Fit The Following Cars (w/ OEM Iron Rotors or PCCB Rotors) Porsche 992 GT3 (Front) Porsche 992 GT3RS (Front) Sold/priced per pair. AP Racing 2-piece S Vane Competition J Hook front disc pair for 992 GT3 and GT3 RS with iron or PCCB discs. ***Note for PCCB cars - must be used with the smaller D62 iron disc pad shape (Ferodo FCP4664 - DS3.12 / DS1.11) Massive increase in airflow, cooling capacity, and durability vs. OEM discs or even conventional curved vane discs 408mm x 34mm (16.06" x 1.34") , 84 Sinusoidal "wave" vanes, D62 radial depth Designed for: club racing, time trial, autocross, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips We are introducing a new internal vane technology in our front 2-piece discs for the 992 GT3. It is called the Sinusoidal Vane, which AP sometimes refers to internally as the 'Wave' Vane for obvious reasons as you’ll see below. This tech is something that has helped AP Racing brake systems win championships in international GT racing, as well as multiple NASCAR Cup championships here in North America. As one of the most desirable track weapons on the planet, we wanted the 992 GT3 to be the first production car application for this technology in North America. Just as AP Racing's Radi-CAL calipers set a new benchmark for caliper stability, cooling, and durability, the Sinusoidal Vanes have done the same for iron racing discs. The concept for this disc design originated in NASCAR Cup. Up until the debut of the Next Gen car (for which AP/Essex are supplying the spec brake package), we were cramming our brake systems inside tiny 15” wheels. Trying to squeeze adequate brake thermal mass into a wheel that small is incredibly challenging, particularly when you have a 1,000 HP and 3,000 pounds mashing on them every few seconds from 200 mph…for hours on end! In a wheel that small, there isn’t anywhere for the heat to go, and the durability of every component is crucial. We were constantly looking for ways to provide the Cup teams with increased durability, stability, and cooling, and that’s what led AP to this technology. Benefits of the Wave Vane disc technology vs. traditional curved vanes: Increased thermal stability- Wild temperature swings are what causes discs to crack. When you stand on the brakes for an approaching corner, your disc temperatures skyrocket and the iron expands. As you travel down the subsequent straight, the discs are blasted with cooling air. The longer the straight and the higher the speed, the greater the temperature drop, and the further the iron contracts. This expansion and contraction cycle places a huge amount of stress on the iron and is what causes them to eventually crack. That’s why tracks with relatively slow corners at the end of high-speed straights, followed by another long straight, decimate brake discs (think Watkins Glen or Road America). In an ideal world, once you brought your discs up to race temps, you would keep them at a constant temperature for the entire session. The Sinusoidal Vane brings the discs closer to that goal by decreasing the difference between the maximum and minimum disc temperature by as much as 35%. That means a less dramatic temperature swing and greater crack resistance and durability. Reduced maximum disc temperatures by 10%+: Not only are temperature swings less intense with the Wave Vane, the maximum temperatures reached are substantially lower. For example, in one NASCAR test the Wave Vane discs showed a peak temp of 1328F and a minimum temp of 1085F (delta of 243F), while the traditional curved vanes maxed out at 1490F and a min of 1121F (delta of 369F). Not only was the difference between min and max more subdued, the max temperature reached by the Wave Vane disc was 162F lower! Increased cooling surface area- Each of the internal Wave Vanes has a larger cooling surface area vs. a traditional curved vane. Greater support for the disc face- A disc’s internal vane structure provides the support lattice behind the disc face. Having many internal vanes impacts airspeed and heat transfer through the disc, reduces air recirculation between vanes, and reduces deflection at the disc face. In practical terms, a disc with a high number of vanes is more thermally stable, maintains more even contact with the brake pads (which reduces uneven pad deposits/judder), and is less prone to distortion. In summary, the Wave Vane design provides even greater support for the disc face than AP’s standard curved vane designs. Reduced weight- The Wave Vane design provides a slight unsprung weight reduction vs. a similar disc with curved internal vanes. AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down.   AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and preparation of AP Racing J Hook Disc Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

Porsche 408x36mm Front Replacement Rings Bring your Porsche’s braking system back to peak performance with the Girodisc D1-291 Front Replacement Rings. Designed for applications using 408x36mm Girodisc two-piece rotors, these rings deliver the same unmatched stopping power, thermal stability, and lightweight construction as your original setup—without the cost of new hats. Each ring is CNC-machined from Girodisc’s proprietary U.S.-poured high-carbon cast iron alloy. The result is exceptional strength, cooling, and longevity for high-performance street and track use. Whether you’re driving your GT4 RS or GT3 RS at full throttle, these replacement rings ensure every lap, corner, and stop feels just as sharp as the first. Features and Benefits Direct replacements for Girodisc 408x36mm two-piece front rotors Includes brand-new hardware—reuse your existing Girodisc aluminum hats Manufactured from proprietary high-carbon cast iron for maximum heat capacity 48 curved directional vanes for superior airflow and cooling efficiency Two-piece floating design reduces unsprung mass and improves handling response Fully machined, balanced, and assembled in the USA Vehicle Fitment 2022+ Porsche 718 Cayman GT4 RS (982) – with steel brakes 2023+ Porsche 911 GT3 RS (992) – with steel brakes These replacement rings are designed exclusively for Girodisc aluminum hats and will not fit OEM or other aftermarket hat systems. They are not compatible with PCCB carbon-ceramic brakes. Why Choose Girodisc Girodisc brake systems are engineered for uncompromising performance. Each rotor ring is precision-machined, balanced, and tested to deliver consistent brake modulation and fade-free stopping power under extreme conditions. When your original rings reach their wear limit, these replacements let you refresh your braking system with OEM-level precision at a lower cost. FAQs Do these include the aluminum hats?No. The D1-291 kit includes only the rotor rings and new hardware. Your existing Girodisc hats are reused. Can these be used with factory rotors?No. Girodisc replacement rings are specifically designed for Girodisc two-piece rotors and will not fit OEM or other aftermarket assemblies. Are they directional?Yes. Each ring features curved internal vanes for optimized airflow and must be installed on the correct side for proper cooling performance. What’s included?Two 408x36mm front rotor rings (left and right) plus a complete hardware kit with new drive pins, bolts, and washers. Ready to Refresh? Restore your Porsche’s braking confidence and consistency with Girodisc D1-291 Front Replacement Rings. Engineered for the 718 GT4 RS and 992 GT3 RS, these rings bring factory-level precision with motorsport-grade performance. Order your set today from Competition Motorsport and keep your Porsche braking at its absolute best.

Performance Friction PFC 380.070.63-64 380mm Two-Piece Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors) Porsche 991 GT3 (Front) Porsche 991 GT3RS (Front) Porsche 981 GT4 (Front) PFC the manufacturer of Porsche Cup braking systems developed a 380x34mm front rotor replacement kit that is a direct replacement for the OEM Iron Brake rotors.  Performance Friction PFC V3 Discs with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. Sold/priced per pair.

Girodisc Corvette C8, Camaro 398mm Front Replacement Rings Refresh the braking performance of your Corvette C8 or Camaro with Girodisc 398mm Front Replacement Rings. Designed as direct replacements for existing Girodisc two-piece rotors, these rings let you reuse your aluminum hats, saving cost and maintaining the precision balance and performance your car was built for. Each pair comes complete with new hardware for a perfect fit. Engineered for Track-Level Performance Each Girodisc replacement ring is machined in the USA from high-quality, proprietary cast iron and features a race-proven curved vane design. This configuration draws cooling air through the rotor, enhancing thermal control and ensuring consistent braking during high-speed track sessions or spirited driving. The result is fade-free performance and long-term durability. Features Sold as a pair and includes new replacement hardware Direct replacement for Girodisc two-piece front rotors Reuse your existing Girodisc aluminum hats to save cost and time Made from proprietary U.S.-poured cast iron for durability and heat management Curved vane internal design promotes maximum airflow and cooling Fully machined, balanced, and finished in the USA Vehicle Fitment 2020–2025 Chevrolet Corvette C8 (all trims equipped with Girodisc 398mm front rotors) 2016–2024 Chevrolet Camaro SS, ZL1, and 1LE models with Girodisc 398mm front rotors Corvette C8, Camaro 398mm Front Replacement Rings FAQs: Do these fit OEM two-piece rotors? No. These rings are specifically designed for Girodisc two-piece rotor systems and will not fit OEM or other aftermarket hats. What’s included in the kit? Two 398mm replacement rings, new hardware, and installation instructions. Your Girodisc aluminum hats are reused. When should I replace my rings? Replace when minimum thickness is reached or if cracking, warping, or heat checking occurs. Do I need to replace both sides at the same time? Yes. Always replace both front rings together for balanced braking and even wear. Can I install these myself? Skilled DIYers can install them, but Girodisc recommends professional installation to ensure proper torque specs and safety. Are these balanced? Yes. Each Girodisc ring is precision-balanced for smooth, vibration-free braking performance. Please note: Girodisc replacement rings are designed exclusively for use with Girodisc hats unless otherwise specified.

Porsche GT4 Clubsport Front Rotors (380x32) The Girodisc system is a direct replacement for the factory cup car discs on the Porsche GT4 Clubsport. No modifications are required—the rotors bolt directly to the car and integrate perfectly with the OEM calipers. This upgrade provides exceptional cooling capacity, lighter weight, and superior durability compared to factory rotors, making it ideal for both professional racing and advanced track-day drivers. Motorsport-Grade Design, Made in the USA Each Girodisc rotor is precision-engineered and manufactured in-house using premium domestic materials. The central hat section is CNC-machined from 6061-T6 aircraft-grade aluminum, while the rotor rings are cast from Girodisc’s proprietary high-carbon iron alloy. This combination delivers outstanding thermal stability and braking consistency under the harshest track conditions. The 380x32 mm size provides increased surface area and heat capacity to reduce fade during extended sessions. Vehicle Fitment Porsche Cayman GT4 Clubsport (981 & 718) Porsche Cayman GT4 MR (Manthey Racing) Porsche Cayman GT4 Competition / Trackday models Features Direct OEM Replacement: Bolts directly to factory hubs and calipers with no modifications required. Lightweight Two-Piece Construction: Reduces unsprung and rotating mass for faster response and improved handling. Curved Vane Cooling: Developed in racing to act as a centrifugal pump, pulling cooling air through the disc for superior heat management. Floating Mount System: Uses 10–12 high-strength alloy steel drive pins secured with anti-noise spring washers, allowing thermal expansion while eliminating rattle and vibration. Replaceable Rotor Rings: The aluminum hats are reusable—only the iron rotor rings need to be replaced when worn. Made in the USA: Every component is designed, machined, and assembled in Girodisc’s U.S. facility to exacting motorsport standards. Additional Notes If your GT4 Clubsport uses OEM center lock wheels, please select the center lock drive pin option when ordering. When paired with performance brake pads and high-temperature brake fluid, these rotors create a highly durable, fade-resistant system that eliminates the common issues of warped or overheated factory discs. FAQs – Porsche GT4 Clubsport Front Rotors (380x32) Are these rotors a direct fit for factory calipers? Yes, they’re a direct bolt-on replacement for OEM calipers—no adapters or modifications are needed. Can they be used on both 981 and 718 GT4 Clubsport models? Yes, these rotors fit both generations of the GT4 Clubsport, including MR and Competition variants. Do I need special hardware? All hardware is included, and installation uses factory mounting points. Are they sold as a pair? Yes, Girodisc rotors are sold and priced per pair. Upgrade your Porsche GT4 Clubsport’s braking system with Girodisc’s lightweight, floating 2-piece rotors for improved cooling, faster response, and race-proven reliability on every lap.

Girodisc Lamborghini Huracán Super Trofeo Front Replacement Rings Engineered for the most demanding GT competition environments, the Girodisc D1-228 front replacement rings for the Lamborghini Huracán Super Trofeo deliver uncompromising performance. Each 380 mm ring is precision-machined from Girodisc’s proprietary high-carbon cast-iron alloy and mounts directly to your OEM Lamborghini aluminum hats, reusing the factory tension-based attachment hardware. Designed to sustain repeated high-temperature cycles, these rotors maintain exceptional pedal feel and fade-free braking lap after lap. Vehicle Fitment Compatible with: Lamborghini Huracán Super Trofeo (EVO, EVO2 front) Lamborghini Huracán GT3 front (Girodisc conversion)Note: Reuse factory iron rotor hats and tension-spring hardware. Not compatible with carbon-ceramic rotor assemblies. Features Sold as a left/right pair Direct replacements rings for the factory 380 mm two-piece front rotors Does not include replacement hardware – reuse the factory tension-based attachment hardware CNC-machined from high-carbon cast iron for maximum heat capacity Directional curved vanes promote superior airflow and cooling Maintains factory brake bias and ABS calibration Precision-balanced for vibration-free performance Designed exclusively for factory aluminum hats – not compatible with Girodisc or other hats Specifications Diameter: 380 mm Position: front Material: high-carbon cast iron Mount type: floating two-piece system Includes: two rotor rings Sold/priced per pair Girodisc D1-228 Lamborghini Huracán Super Trofeo Front Replacement Ring FAQs Are these rings compatible with OEM Super Trofeo iron rotors? Yes. They are engineered specifically to replace the factory iron rotor rings, reusing the factory hats and hardware. They are not compatible with the factory carbon-ceramic setup. Can they handle full GT-class endurance racing? Absolutely. The D1-228 rings are used in professional GT programs and provide exceptional thermal stability through long stints. Do they affect ABS or traction-control calibration? No. They retain OEM rotor geometry, ensuring all driver-assist systems function as intended. How often should these rings be replaced? Girodisc recommends replacement when thickness approaches the wear limit or if heat-checking exceeds standard track tolerance. Upgrade your Lamborghini Huracán Super Trofeo’s braking system with Girodisc D1-228 front replacement rings — precision-built for cooling efficiency, endurance durability, and ultimate stopping power on the world’s fastest circuits.

Chevrolet Camaro ZL1 (5th Gen) Front Rotors The Girodisc system is a direct replacement for the factory front rotors on the fifth-generation Chevrolet Camaro ZL1. No modifications are necessary—these lightweight 2-piece floating rotors bolt directly to the car and integrate perfectly with OEM calipers. By upgrading to Girodisc performance rotors, you’ll maintain factory brake bias and ABS performance while gaining improved cooling, reduced fade, and sharper pedal response under hard braking. Race-Proven Design, Made in the USA Each Girodisc rotor is designed, cast, and machined entirely in-house in the USA to exacting standards. The hat is CNC-machined from 6061-T6 aircraft-grade aluminum for strength and weight reduction, then anodized for corrosion resistance. The rotor rings are made from Girodisc’s proprietary high-carbon iron alloy, formulated for exceptional durability and thermal stability. The curved vane design acts as a centrifugal pump, forcing cooling air through the disc for optimal heat management during aggressive driving or track use. Vehicle Fitment Chevrolet Camaro ZL1 (5th Gen, 2012–2015) Chevrolet Camaro SS with ZL1 brake package (retrofit fitment) Features Direct OEM Replacement: Bolts directly to factory hubs and calipers—no modifications required. Lightweight Construction: Two-piece floating design reduces unsprung and rotational mass for better handling and acceleration. Curved Vane Cooling: Internal directional vanes pump cooling air through the rotor for maximum heat dissipation and fade resistance. Floating Mount System: Twelve high-strength alloy steel drive pins maintain axial and radial float while anti-noise spring washers eliminate rattles under thermal expansion. Replaceable Rings: The aluminum hats are reusable—only replace the iron rings when worn to save on long-term costs. Made in the USA: Fully machined and assembled domestically for guaranteed precision and quality. FAQs – Chevrolet Camaro ZL1 (5th Gen) Front Rotors Do these rotors fit the stock Brembo calipers? Yes, they are designed to bolt directly to the factory ZL1 Brembo calipers with no adapters required. Are these rotors suitable for track use? Absolutely. Girodisc rotors are designed for both street and track use, offering outstanding heat management and fade resistance. What is the benefit of a two-piece design? The aluminum hat and floating iron ring combination significantly reduces unsprung mass and improves cooling, performance, and serviceability. Are the rotors sold individually or in pairs? All Girodisc rotors are sold and priced per pair. Upgrade your Camaro ZL1’s braking performance with Girodisc’s lightweight floating front rotors. Experience improved pedal feel, faster cooling, and the durability that makes Girodisc the choice of serious enthusiasts and track drivers alike.

D1-216 Girodisc Audi 374mm Front Replacement Rings Restore your Audi’s braking precision with Girodisc D1-216 374mm front replacement rings. These precision-engineered rings mount directly to your existing Girodisc aluminum hats using the included floating hardware kit. Each ring is machined from Girodisc’s proprietary high-carbon cast iron, providing exceptional heat capacity, reduced fade, and consistent performance for both street and track use. Vehicle Fitment Compatible with:• Audi RS5 (B9, 2018+)• Audi S6 / S7 (C8, 2020+)• Audi RS4 (B9, 2018+)Note: Designed exclusively for Girodisc 374mm two-piece front rotor systems. Not compatible with OEM one-piece or carbon-ceramic rotors. Features • Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 374mm two-piece front rotors• CNC-machined from high-carbon cast iron for excellent thermal stability• Directional curved vanes enhance airflow and cooling• Maintains factory brake bias and ABS/ESC calibration• Precision-balanced for smooth, quiet operation• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 374mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and new hardware kit• Sold/priced per pair Girodisc D1-216 Audi 374mm Front Ring FAQs Do these fit Audi’s factory two-piece rotor hats? No. The D1-216 rings are made specifically for Girodisc hats and won’t bolt to OEM or other aftermarket hats. Will they clear factory calipers? Yes. They maintain the correct rotor offset and dimensions to fit factory or OEM-sized calipers without modification. How do they perform compared to OEM rotors? Girodisc rings offer improved cooling, lighter rotational mass, and reduced fade during repeated hard braking. Are they suitable for daily driving? Absolutely. The floating hardware design keeps noise low in normal driving while providing race-ready heat management when pushed hard. Upgrade your Audi’s braking performance with Girodisc D1-216 374mm front replacement rings — engineered for precise fitment, cooling efficiency, and long-lasting performance on street and circuit.