AP Racing Radi-CAL 380mm Competition Brake Kit (Front) FIT The Following Cars Porsche 992.1 GT3 Cup Car Porsche 991.2 GT3 Cup Car Complete rear AP Racing Radi-CAL Competition Brake Kit. Fits the Porsche 991.2 and 992.1 GT3 Cup car. Complete front AP Racing by Essex Radi-CAL Competition Brake Kit for the Porsche 991.2 GT3 Cup (2017-2020): Eliminates the need to remove the caliper for pad changes Direct bolt-on to OE Porsche Motorsport 991.2 Cup uprights with included spacers AP Racing Radi-CAL CP9665 calipers with durable ventilated stainless steel pistons and anti-knockback springs Hard anodized caliper finish that is resistant to wear and deterioration at elevated temperatures 380mm x 32mm 2-piece floating 72-vane J Hook Discs with D54 radial depth Innovative spline drive system further mitigates knockback and offers highly consistent pedal effort Designed for: club racing, time trial, autocross, HPDE Every component designed to resist the heat of extended track sessions Works with standard OE master cylinder sizes Includes pad tension kit (eliminates noise) and disc burning at no additional cost Designed to work with Ap Racing front Brake Kit

AP Racing Radi-CAL 380mm Competition Brake Kit (Rear) Fit The Following Cars Porsche 992.1 GT3 Cup Car Porsche 991.2 GT3 Cup Car Complete rear AP Racing Radi-CAL Competition Brake Kit. Fits the Porsche 991.2 and 992.1 GT3 Cup car. Eliminates the need to remove the caliper for pad changes AP Racing Radi-CAL with durable ventilated stainless steel pistons and anti-knockback springs Hard anodized caliper finish that is resistant to wear and deterioration at elevated temperatures Large selection of brake pad options from all major pad manufacturers Fits OE 18" GT3 Cup wheels without a spacer 380x32mm, 72 vane AP Racing disc vs. only 48 cooling vanes in the OE disc Works with standard OE master cylinder sizes Every component designed to resist the heat of extended track sessions Designed for: club racing, time trial, autocross, HPDE Includes pad tension kit (eliminates noise) and disc burning at no additional cost Designed to work with Ap Racing front Brake Kit

AP Racing 380x30mm 2-piece J Hook Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors) Porsche 991 GT3 Cup Car (Rear) AP Racing 2-piece Competition J Hook front disc pair for 991 GT3 Cup Car 380mm x 30mm (14.96" x 1.18") 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. 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 380x32mm 2-piece J Hook Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors) Porsche 991 GT3 Cup Car (Front) AP Racing by Essex 2-piece Competition J Hook front disc pair for 991 GT3 Cup Car 380mm x 32mm (14.96" x 1.26") 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. 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.

Girodisc  Rear Brake Rotors – Porsche 991 GT3 Cup Car The Girodisc A2-238 Rear Rotor Set (380x30mm) is a direct replacement for the OE cup car discs used on the Porsche 991 GT3 Cup. Engineered for performance and reliability under extreme track conditions, these rotors bolt directly to your car and work seamlessly with the original calipers and ABS system—no modifications required. Race-Proven Two-Piece Design Each Girodisc rotor is designed and manufactured in the USA with precision components to ensure durability and superior thermal management. The central hat section is CNC-machined from U.S.-sourced 6061-T6 aircraft-grade aluminum, while the outer ring is made from Girodisc’s proprietary cast iron alloy, poured and machined entirely in-house. The curved vane design actively pumps cooling air through the disc, reducing temperatures during intense braking to prevent fade and warping. A2-238 Girodisc 380mm 2pc Rear Brake Rotor Features • Direct replacement for OEM Porsche 991 GT3 Cup rear discs (380x30mm)• Two-piece floating rotor design for optimal heat management• 6061-T6 aluminum hats machined from U.S.-sourced billet• Proprietary cast iron rotor rings with curved vane cooling geometry• 12 high-strength alloy steel drive pins with cadmium plating• Anti-noise spring washers eliminate rattle while maintaining full float• Class 12.9 hardware and hardened washers for secure mounting• Significantly reduces unsprung and rotational mass• Reusable hats—replace only rings when worn• Sold/priced per pair• Optional center-lock drive pin kit available A2-238 Girodisc 380mm 2pc Rear Brake Rotor Vehicle Fitment • Porsche 991 GT3 Cup (All model years) – Rear• Fits OEM calipers and ABS• Center-lock wheel option available upon request A2-238 Girodisc 380mm 2pc Rear Brake Rotor FAQs Do these rotors fit directly without modifications? Yes. The Girodisc A2-238 system is a direct bolt-on replacement for OEM rear discs on the 991 GT3 Cup. What is the advantage of a two-piece floating rotor? The floating design allows the iron rotor ring to expand under heat without stressing the aluminum hat, improving performance, reducing weight, and preventing cracking or distortion. Can I reuse the aluminum hats? Yes. Once the cast iron rings wear out, you can replace just the rings and retain the existing hats and hardware. Do these rotors make noise? No. The use of anti-noise spring washers ensures quiet operation even when cold, while maintaining true floating capability under heat. Are these rotors sold individually? No. The Girodisc A2-238 rotors are sold as a pair for the rear axle. Is a center-lock version available? Yes. Girodisc offers a specific drive pin option for vehicles equipped with OEM center-lock hubs—select this option when ordering. Enhance your Porsche 991 GT3 Cup’s braking performance with the Girodisc A2-238 2-Piece Rear Brake Rotors (380x30mm)—precision-engineered, race-proven, and built to handle the most demanding conditions on track.

Porsche 991 GT3 Cup Front Rotors (380x32) The Girodisc system is a direct replacement for the OE front rotors on the Porsche 991 GT3 Cup car. No modifications are required—these lightweight 2-piece floating rotors bolt directly to the car and work seamlessly with factory calipers. Designed for the demands of professional motorsport, Girodisc rotors deliver superior cooling, durability, and braking precision under the harshest track conditions. Built for Competition-Level Performance Girodisc 380x32mm rotors are engineered and machined entirely in the USA from the highest-quality materials. The aluminum hat is CNC-machined from 6061-T6 aircraft-grade alloy for weight savings and strength. The iron rotor rings are made from Girodisc’s proprietary high-carbon alloy, poured and machined in-house for exacting balance and heat resistance. The curved vane design acts as a centrifugal pump, drawing air through the disc to reduce fade and maintain consistent braking throughout long races. A1-238 Girodisc 380mm 2pc Front Brake Rotor Vehicle Fitment Porsche 911 GT3 Cup (991.1 & 991.2) Porsche 911 GT3 R (for equivalent front setup) A1-238 Girodisc 380mm 2pc Front Brake Rotor Features Direct OEM Replacement: Bolts directly to factory hubs and calipers—no modifications needed. 380x32mm Rotor Size: Provides greater surface area and heat capacity for endurance-level braking. Lightweight Two-Piece Design: Reduces unsprung and rotational mass to improve cornering response and acceleration. Curved Vane Internal Cooling: Directional vanes act as centrifugal pumps, pulling cool air through the disc to reduce temperatures and extend pad life. Floating Mount System: Twelve high-strength alloy drive pins with anti-noise spring washers allow the rotor to expand under heat while preventing rattle. Replaceable Rings: The aluminum hats are reusable—only replace the iron rings when worn. Made in the USA: Designed, cast, machined, and assembled domestically to the highest racing standards. A1-238 Girodisc 380mm 2pc Front Brake Rotor FAQs Do these rotors fit OEM calipers? Yes, they fit directly with the factory Porsche Motorsport calipers. Can they handle endurance racing? Absolutely. Girodisc rotors are built to survive repeated high-temperature cycles during endurance and sprint events. What makes Girodisc better than OEM? They offer reduced weight, better cooling, and replaceable rotor rings, saving long-term maintenance costs. Are they sold as a pair? Yes, Girodisc rotors are sold and priced per pair. Enhance your Porsche 991 GT3 Cup’s braking performance with Girodisc’s 380x32mm 2-piece floating rotors. Designed for uncompromising race performance, these rotors deliver cooler operation, consistent pedal feel, and lasting durability for the most demanding track conditions.

AP Racing J Hook 380x32mm Replacement Brake Rotor Rings This kit is two replacement rotor discs and associated installation hardware only. Center hat is not included. Replacement discs for AP Racing 380mm Brake Rotors for Porsche Fits The Following Cars: Porsche 992 GT3 Cup (Front and Rear) Porsche 991 GT3 Cup (Front and Rear) Sold/priced per pair of rotor rings (including hardware). 380x32mm (14.96" x 1.25") 72-vane, D66, J Hook Iron Racing Brake Disc Replacements 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.

Girodisc D2-238 Porsche 991 Cup / GT4 Clubsport Rear Replacement Rotor Rings (380x30) The Girodisc D2-238 Rear Replacement Rotor Rings are precision-engineered replacements for Girodisc two-piece rear rotors on the Porsche 991 Cup Car and Cayman GT4 Clubsport. Designed to restore factory braking performance and cooling efficiency, these 380x30mm rotor rings are built for the demands of professional motorsport. Race-Ready Engineering. Factory-Perfect Fit. Manufactured in the USA from Girodisc’s proprietary cast iron alloy, each rotor ring is optimized for strength, consistency, and high thermal capacity. The curved vane internal design acts as a centrifugal pump, forcing air through the rotor to maximize cooling and minimize fade. Sold as a pair, the kit includes all new hardware and is designed to bolt directly to your existing Girodisc aluminum hats for a simple, precise installation. Features • Size: 380mm x 30mm• Direct replacement rings for Girodisc Porsche 991 Cup and GT4 Clubsport rear rotors• Cast from Girodisc proprietary high-carbon iron alloy in the USA• Curved vane internal geometry for improved airflow and cooling• Includes all new hardware (drive pins, washers, and bolts)• Reuses Girodisc aluminum hats• Not compatible with OEM or non-Girodisc hats• Sold/priced per pair Vehicle Fitment • Porsche 991 GT3 Cup (All Years) – Rear• Porsche Cayman GT4 Clubsport (981 & 982) – Rear• Designed for Girodisc two-piece rotor systems• Will not fit OEM two-piece rotors or other aftermarket hats Girodisc D2-238 Porsche 991 Cup / GT4 Clubsport Rear Replacement Rings FAQs Can I reuse my aluminum hats? Yes. These replacement rings bolt directly to your existing Girodisc aluminum hats with the supplied hardware. Do these fit OEM or factory rotors? No. Girodisc replacement rings are engineered specifically for Girodisc two-piece systems and are not compatible with OEM or other aftermarket hats. What’s included in the package? Two iron rotor rings (left and right) and a full hardware kit for reassembly. Are the rotors directional? Yes. Each rotor features directional curved vanes for optimal airflow and cooling efficiency—ensure correct orientation during installation. Are they sold individually or as a set? The Girodisc D2-238 Rear Replacement Rotor Rings are sold and priced per pair, complete with hardware. What benefits do these offer over OEM rotors? Girodisc rotors reduce unsprung weight, improve cooling efficiency, and maintain consistent pedal feel and braking balance under the harshest track conditions. Maintain championship-level braking performance with Girodisc D2-238 380x30mm Rear Replacement Rotor Rings—crafted in the USA to deliver maximum precision, cooling, and reliability for Porsche 991 Cup and GT4 Clubsport race cars.

Girodisc Porsche 991 Cup, GT4 Clubsport Front Replacement Rings (380x32) Restore the elite braking performance of your Porsche Cup or Clubsport with Girodisc D1-238 380x32mm front replacement rings. Engineered for uncompromising precision, these rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Crafted from high-carbon cast iron, they provide superior heat management, fade resistance, and consistent pedal feel under extreme race conditions. Vehicle Fitment Compatible with:• Porsche 991 Cup (2013–2019, front)• Porsche 981 GT4 Clubsport (front)• Porsche 718 GT4 Clubsport (front)Note: Designed exclusively for Girodisc 380x32mm two-piece front rotor systems. Not compatible with OEM PCCB or one-piece rotors. Features • Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 380x32mm two-piece front rotors• CNC-machined from proprietary high-carbon cast iron for superior strength and cooling• Directional curved vanes maximize airflow and heat dissipation• Balanced and precision-machined for vibration-free performance• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 380mm• Thickness: 32mm• 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 D1-238 Porsche 991 Cup / GT4 Clubsport Front Replacement Ring FAQs Do these fit factory Porsche Cup rotor hats? No. The D1-238 rings are designed exclusively for Girodisc aluminum hats and will not mount to OEM or AP Racing hats. Can they handle sustained race heat cycles? Absolutely. Girodisc’s high-carbon alloy and curved vane design deliver outstanding thermal capacity for endurance and sprint racing. Are these compatible with the Porsche 718 GT4 Clubsport? Yes. They fit all 981 and 718 GT4 Clubsport models equipped with 380x32mm front Girodisc systems. How do they compare to OEM Cup rotors? Girodisc rotors offer reduced unsprung weight, lower running costs, and more consistent friction characteristics under repeated braking. Upgrade your Porsche 991 Cup or GT4 Clubsport with Girodisc D1-238 380x32mm front replacement rings — precision-engineered for cooling, endurance, and repeatable braking control lap after lap.

Ferodo 11 FRP3151GB-N DS3.12 Porsche 991 GT3 Cup Car Front Brake Pads   Ferodo 11 FRP3151GB-N DS3.12 Porsche 991 GT3 Cup Car Front Brake Pad Fitment: Porsche 991 911 GT3 Cup Car (Front) Ferodo Brake Pad Compound DS3.12 The DS3.12 brake pad compound is the latest evolution in Ferodo's incredible DS line. Sports cars today have more of everything: more horsepower, more sophisticated aero, higher curb weights, and stickier tires. These attributes place serious demands on a vehicle's brake system. Ferodo 11 FRP3151GB-N Comparison Chart The Ferodo DS3.12 is the modern pad compound designed from the start to explicitly handle those demands. Out of all the pad compounds we've ever tested, from all manufacturers, the DS3.12 shows the flattest torque curve across the broadest temperature range. That means on every turn, on every track you drive, on every lap, your brake pedal is going to feel almost exactly the same. This gives you tremendous consistency and repeatability. Ferodo 11 FRP3151GB-N Coefficient of Friction (Mu) Chart The DS3.12 has a higher mu (µ) than Ferodo's other compounds, so not as much pedal pressure is required to initiate the desired response. It is also un-fadable, showing no drop in performance at any temperature your brakes will ever see. In dyno testing, the Ferodo DS3.12 has shown superior wear rates compared to the other Ferodo compounds, while remaining kind to brake rotors. Ferodo 11 FRP3151GB-N Temperature Chart We believe the Ferodo DS3.12 will become the gold standard to which other race compounds will be compared.

Pagid Racing Brake Pad Shape No. 4920 Fits the Following Vehicles: Make Model Build (Year) Front Rear Porsche 991 GT3 Cup [PFC calipers 22/20 mm] 2013 + X Porsche 991 GT3 Cup MR [PFC calipers 22/20 mm] 2013 + X Porsche Cayman GT4 Clubsport [PFC calipers 22/20 mm] 2016 + X Porsche Cayman GT4 MR [PFC calipers 22/20 mm] 2016 + X Pagid Racing Brake Pads are engineered for high-performance driving, delivering exceptional stopping power, durability, and control under the most demanding conditions. Trusted by professional racers and performance enthusiasts worldwide, these pads are crafted using advanced friction materials and cutting-edge technology to ensure consistent performance, low fade, and excellent modulation. Whether you're on the track or tackling aggressive street driving, Pagid Racing Brake Pads provide the reliability and confidence you need to push your vehicle to its limits. Pagid Racing Brake compounds are for steel (cast iron) rotors only unless otherwise noted. Pagid RSL 1 Compound Used in GT cars, touring cars and prototype endurance racing. Due to the high friction and good modulation, often used in sprint races as well. RSL 1 is a low metallic resin bonded material containing steel and aramid fibers with very high heat resistance. It maintains a constant friction level over a wide range of temperatures. Its reduced wear rate and disc friendliness make this material appropriate for endurance races. Pagid RST 1 Compound Used in Rally tarmac, GT cars and touring cars circuit racing (sprint), high down-force formula cars, NASCAR. Suitable for applications in heavy cars and where high torque is necessary against small diameter rotors. RST 1 has a very high friction level and high temperature resistance. It is a semi-metallic resin bonded material containing steel fibers. Cold friction and initial bite makes this material most appropriate for Rally and NASCAR applications.

Pagid Racing Brake Pads Shape No. 4928 Fits The Following Vehicles: Make Model Build (Year) Front Rear Porsche 991 GT3 Cup [PFC brakes 28/26 mm] 13 -19 X Porsche 991 GT3 Cup MR [PFC brakes 28/26 mm] 13 -19 X Porsche Cayman GT4 Clubsport [PFC brakes 28/26 mm] 16 -20 X Porsche Cayman GT4 MR [PFC brakes 28/26 mm] 16 -20 X Pagid Racing Brake Pads are engineered for high-performance driving, delivering exceptional stopping power, durability, and control under the most demanding conditions. Trusted by professional racers and performance enthusiasts worldwide, these pads are crafted using advanced friction materials and cutting-edge technology to ensure consistent performance, low fade, and excellent modulation. Whether you're on the track or tackling aggressive street driving, Pagid Racing Brake Pads provide the reliability and confidence you need to push your vehicle to its limits. Pagid Racing Brake compounds are for steel (cast iron) rotors only unless otherwise noted. RSL 29 Compound: The Pagid RSL 29 (Yellow) is the world-leading endurance brake pad used by most of the winning teams in motorsport. Although designed primarily for endurance racing, many competitors use this material successfully for sprint and short distance races also. RS29 has also found favor in the growing track day market due to the level of control, good cold performance, long life and low disc wear. Pagid RSL 1 Compound Used in GT cars, touring cars and prototype endurance racing. Due to the high friction and good modulation, often used in sprint races as well. RSL 1 is a low metallic resin bonded material containing steel and aramid fibers with very high heat resistance. It maintains a constant friction level over a wide range of temperatures. Its reduced wear rate and disc friendliness make this material appropriate for endurance races. Pagid RSL 2 Compound: RSL 2 is a low metallic resin bonded material containing steel and aramid fibers with high heat resistance. It maintains a constant friction level over a wide range of temperatures. Its reduced wear rate and disc friendliness make this material appropriate for endurance races on applications with high cooling efficiency. RSL 2 features excellent pad life and modulation, as well as friction stability at high temperatures. Applications include GT cars, touring cars and prototype endurance racing. Due to excellent modulation characteristics, RSL 2 is often also used in sprint races. Pagid RST 1 Compound Used in Rally tarmac, GT cars and touring cars circuit racing (sprint), high down-force formula cars, NASCAR. Suitable for applications in heavy cars and where high torque is necessary against small diameter rotors. RST 1 has a very high friction level and high temperature resistance. It is a semi-metallic resin bonded material containing steel fibers. Cold friction and initial bite makes this material most appropriate for Rally and NASCAR applications. Pagid RST 2E Compound: RST 2E is perfect as a front axle application in mid-endurance GT and touring car racing, in the range of 2-6h race duration. Front and rear axle application on rally race cars. RST 2 and RST 2E are semi-metallic resin bonded materials containing steel fibers. Cold friction and initial bite make these materials most appropriate for rallying and NASCAR applications. Pagid RST 3 Compound: RST 3 is a medium-high friction metal-ceramic compound containing steel fibers and is therefore the perfect complement of the RST product family. It captivates by its low heat conductivity. Rally tarmac and gravel, GT cars, touring cars and prototype circuit racing, formula cars and club racing. Wide range of applications due to it‘s combination of bite, friction and controllability. Pagid RST 5 Compound: Developed for high friction level sprint applications where extreme thermal stability is key. Comes in a variety of different pad shapes used in GT racing front axles, touring car front axles, rally sports, especially FIA Rally 3, Rally 2, Rally 1, and RX Rallycross. Excellent fade resistance as well as one of the highest initial bite and friction levels of the PAGID Racing compound portfolio. RST 5 is suitable for high-thermal load applications, making it a top choice for sprint racers in terms of performance. RST 5 delivers the ideal balance between maximum performance and excellent modulation.

PFC Rear Slotted Replacement Disc V2/V3 Porsche 991 GT3 Cup / 981 GT4 Clubsport Dimensions: 380 mm diameter, 30 mm thickness, 47 mm radial depth Brake disc only, does not include brake hat. Restore your braking performance with the PFC Front Slotted Replacement Disc, engineered specifically for the Porsche 991 GT3 Cup and Porsche Cayman GT4 Clubsport with PFC front rotors. This is a set of two replacement discs (rotor rings) only, and does not include the aluminum rotor hats. Designed for uncompromising track performance, this 380mm V2/V3 slotted disc restores the exceptional stopping power, durability, and heat management of your PFC front brake rotors. Precision-Machined for Motorsport Applications Crafted from high-quality materials and manufactured to exacting motorsport standards, this replacement disc ensures consistent performance under extreme braking conditions. The V2/V3 slotted design enhances pad bite, improves heat dissipation, and reduces the risk of glazing—making it ideal for sprint racing and high-intensity track use. Key Features: Optimized Dimensions: 380mm diameter x 30mm thickness for perfect fit and performance. V2/V3 Slotted Design: Maximizes braking efficiency, heat management, and debris removal. Direct Replacement: Fits Porsche 991 GT3 Cup (Sprint) and Porsche 981 Cayman GT4 Clubsport (FIA GT4 homologated) models with PFC front slotted two-piece floating rotors. Track-Focused Performance: Engineered for demanding racing environments. Disc Only: Brake bell not included. Compatibility: Porsche 991 GT3 Cup (Sprint). Not for use in official Porsche Carrera Cup championships. Porsche Cayman GT4 Clubsport (FIA GT4 homologated) GT4CS. Part numbers: 380.30.0047.451 380.30.0047.461 Whether you're chasing podiums or refining your lap times, the PFC Front Slotted Replacement Disc returns the braking performance, reliability, and precision the PFC brake rotors on your Porsche 991 GT3 Cup or GT4 Clubsport demands. Order today from Competition Motorsport for expert service and fast shipping.

PFC Front Slotted Replacement Disc V2/V3 Porsche 991 GT3 Cup / 981 GT4 Clubsport Restore your braking performance with the PFC Front Slotted Replacement Disc, engineered specifically for the Porsche 991 GT3 Cup and Porsche Cayman GT4 Clubsport with PFC front rotors. This is a set of two replacement discs (rotor rings) only, and does not include the aluminum rotor hats. Designed for uncompromising track performance, this 380mm V2/V3 slotted disc restores the exceptional stopping power, durability, and heat management of your PFC front brake rotors. Precision-Machined for Motorsport Applications Crafted from high-quality materials and manufactured to exacting motorsport standards, this replacement disc ensures consistent performance under extreme braking conditions. The V2/V3 slotted design enhances pad bite, improves heat dissipation, and reduces the risk of glazing—making it ideal for sprint racing and high-intensity track use. Key Features: Optimized Dimensions: 380mm diameter x 32mm thickness for perfect fit and performance. V2/V3 Slotted Design: Maximizes braking efficiency, heat management, and debris removal. Direct Replacement: Fits Porsche 991 GT3 Cup (Sprint) and Porsche 981 Cayman GT4 Clubsport (FIA GT4 homologated) models with PFC front slotted two-piece floating rotors. Track-Focused Performance: Engineered for demanding racing environments. Disc Only: Brake bell not included. Compatibility: Porsche 991 GT3 Cup (Sprint). Not for use in official Porsche Carrera Cup championships. Porsche Cayman GT4 Clubsport (FIA GT4 homologated) GT4CS. Part Numbers: 380.32.0054.451 380.32.0054.461 Whether you're chasing podiums or refining your lap times, the PFC Front Slotted Replacement Disc returns the braking performance, reliability, and precision the PFC brake rotors on your Porsche 991 GT3 Cup or GT4 Clubsport demands. Order today from Competition Motorsport for expert service and fast shipping.

Performance Friction PFC Brake Pads 7968.XX.28.44 Race-Ready, High-Performance Brake Pads Performance Friction Corporation (PFC) Brake Pads 7968.XX.28.44 deliver unmatched stopping power, precision control, and proven durability for sports car racing. Engineered with over 35 years of friction expertise, these premium brake pads are built to perform at the highest levels of motorsport competition. Each PFC brake pad is manufactured using proprietary friction materials and a zero-compromise design process to ensure consistent, fade-free braking under extreme track conditions. All PFC pad compounds are “Race Ready,” offering a fast and easy bed-in process with rotors for immediate performance gains. Trusted by Championship Teams Worldwide PFC Brake Pads are trusted by professional drivers and racing teams competing in some of the world’s most demanding series, including: NTT IndyCar Series IMSA Continental Tire SportsCar Challenge Porsche Cup Racing Pirelli World Challenge ...and many more! Why Choose PFC Brake Pads 7968.XX.28.44? High-performance, race-proven friction materials Consistent pedal feel and fade resistance Quick, reliable burnishing with minimal downtime Used by winning teams with More Championships than Any Other™ When it comes to professional-grade racing brakes, PFC Brake Pads 7968.XX.28.44 are the performance upgrade your car needs. Join the global community of champions who trust PFC for faster laps, better control, and superior stopping power. PFC 331 Compound PFC 331 is the next generation of PFC endurance material. Improved control with ABS, and gentle on discs. The PFC 331 Carbon Metallic ® compound has been developed with higher initial bite than PFC’s renowned PFC 08 endurance compound. PFC 331 has improved release, and continues to offer exceptional control and feel. It boasts low wear rate and exceptional disc conditioning. PFC 82 Compound: New Front Endurance Compound PFC 82 is the new standard for PFC endurance compounds. It has gained an immediate following upon release in the endurance sportscar world after its debut win in the 2023 24hrs of Nürburgring. PFC 82 is a degressive pad specifically designed to work together with ABS to give superior control and a smooth release, minimizing lockups. PFC 82 compound has an extremely low wear rate while simultaneously being extra gentle on discs, making this compound the ultimate endurance option. Long distances aren’t this pad’s only strong suit though! With a very high initial bite, this pad can also be used for medium distance sprint applications, where ABS compatibility and a low wear rate are requested. The 82 compound was developed by working closely with experienced teams and drivers to ultimately tailor this pad to have the perfect combination of durability and speed! PFC 15 Compound The new generation PFC 15 compound is becoming very popular due to its excellent braking characteristics. Very good in all conditions and excellent when running at high temperatures. Its easy control and release are appreciated by engineers and drivers. Gentle on discs and low wear rate are other excellent virtues. PFC 15 is a great compound winner in different GT3/GT4 races or open wheel categories such as US F3, F3 and Indy Lights. It has better cold bite than 11 or 13. PFC 15 is one of the most complete PFC compounds and works very well with modern racing ABS. PFC 11 Compound A new-generation sprint and medium distance friction material, giving you the ultimate in control with superior disc conditioning. Developed from PFC 01 compound with improved bite, modulation, and release characteristics. It is ultra smooth and developed to reduce wheel locking at the end of braking while giving more cold and hot bite than the endurance oriented 08 compound. Brake with confidence; brake with ultimate control and modulation. Performance Friction PFC 7968 Brake Pad Fitment Make Model Year Notes Porsche 911 991 GT3 Cup 2013 - 2019 Front Porsche Cayman 981 GT4 Clubsport 2013 - 2019 Front

Cobalt Brake Pads Porsche RC57 Racing Brake Pads (Front) Cobalt RC57 Fits The Following Vehicles: Porsche 991 GT3 Cup Car  (2013-2019) Porsche 981/718 Cayman GT4 Clubsport (2016-2022) Cobalt Friction Technologies, Inc. is a leading developer & manufacturer of friction compounds for high-performance and professional motorsport disc brake applications. With our industry-leading range of race-proven XR-Series Carbon-Ceramic materials, Cobalt has a solution to meet your most demanding performance requirements, while always exceeding your expectations with superior technical and race engineering support. PASSION The heart and soul of Cobalt Friction Technologies is fueled by our never-ending passion for motorsports. Our teams and drivers continually place greater demands on their equipment, and Cobalt Friction is there to satisfy these demands every step along the way. PERFORMANCE Cobalt Friction's customer-driven research & development is what sets us apart from the competition. Our engineers do not design compounds based on lab results alone or to solely meet overly simplified, uni-dimensional "performance criteria". Rather, we continually "step outside the box" by working with and collecting feedback from our drivers and teams at all levels of professional and amateur motorsports, right there at the race track...week in and week out. When being the best and finishing first is the only option, Cobalt Friction accepts zero compromises, and so do our customers and teams. TECHNICAL EXCELLENCE Cobalt-equipped drivers and teams are backed by race engineering support that is second to none. From the garages at the Rolex 24 at Daytona to the paddock at the SCCA Nationals, Cobalt Friction Technologies delivers the products, knowledge and power to win.