Vehicle Gear

AP Racing 350x28mm Replacement J Hook Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors)- Center hat Excluded, rotor discs and hardware only. Replacement Disc Only For AP Racing 13.01.20043 Fit The Following Cars (w/ OEM Iron Rotors) Corvette C8 Z51 Rear AP Racing by Essex 2-piece Competition J Hook Rear disc pair for Corvette C8 Z51 with iron discs 350mm x 28mm (13.78" x 1.10") 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 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.

Sparco QRT-R Racing Seat Ultra-lightweight QRT Technology At Its Best! The QRT-R is the first seat to feature Sparco’s patented QRT ultra-light technology. This QRT Technology gives an unparalleled mechanical strength/weight ratio for fiberglass composite racing seats. QRT Technology gives weight savings of 7 lbs to 10 lbs per shell. The main benefit is that QRT-R seat approaches the weight of a carbon fiber seat at a price of a fiberglass seat. The QRT-R is the lightest "Medium/Large" size fiberglass seat, the shell alone weighs only 9.9 lbs (or 15 lbs fully trimmed). The QRT-R has a unique CAD design that features a lower seating position that can fit a larger/taller driver with the exterior dimensions that can fit into smaller vehicles. The QRT-R is FIA 8855-1999 approved. Available in cloth. Requires the #600QRT side mount for proper mounting. Sparco QRT-R Racing Seat Key Features Lightest "Medium/Large" size fiberglass seat on the market Lower seating position that can fit taller/larger drivers Smaller outer dimensions for small vehicle fitment QRT Technology gives an average weight savings of 7lbs per shell FIA 8855-1999 approved Dimensions

Sparco Grid Q Racing Seat The Sparco Grid Q is engineered for superior lateral support, driver ergonomics, and safety. Its modular padding system uses individual Velcro-attached pads to fine-tune fit and create natural ventilation channels across the seating surface. A new shell design adds deep side bolsters and supportive shoulders for excellent hold under high-G loads. Built with Sparco’s QRT (Quick Resin Technology), the Grid Q achieves an ultra-light fiberglass composite shell while maintaining outstanding strength. Side cushions can be removed for additional hip room, and the harness slots accommodate a wide range of driver sizes. The Grid Q is FIA approved and HANS compatible. Sparco QRT Technology QRT delivers an exceptional strength-to-weight ratio, reducing shell weight by up to 30% versus traditional fiberglass methods—approaching carbon fiber performance at a more accessible price point. Features QRT ultralight fiberglass composite shell Deep side and shoulder bolsters for lateral support Modular Velcro padding with ventilation channels Removable side cushion for wider fit Harness slots fit a broad range of drivers HANS device compatible Fire-retardant, self-extinguishing upholstery with non-slip zones FIA 8855-1999 approved Dimensions

Sparco Pro 2000 QRT Racing Seat QRT TECHNOLOGY LIGHTENS THE ICONIC SPARCO PRO 2000 The Pro 2000 QRT is an evolution of Sparco's iconic Pro 2000 seat. The Pro 2000 QRT has been upgraded with new ergonomics and technology. It is designed for a medium-sized driver with a waist size up to 34 inches.  The Pro 2000 QRT is Sparco's deepest bolstered seat, giving the driver exceptional lateral support. It also features removable/adjustable lumbar cushions and non-slip fabric on the shoulder and bottom cushion areas for improved seat comfort. The Pro 2000 QRT is made with all-new QRT Technology, resulting in an ultra-light yet incredibly strong outer shell. The shoulder harness openings have been raised and the seat area around the mid-section has been reshaped for less interference when compared to the original Pro 2000. The Sparco Pro 2000 QRT is FIA approved.  WHAT IS QRT? Designed and developed at the Sparco OEM Composite Laboratory in Italy, QRT is a patented state-of-the-art technical process, based on aerospace technologies. QRT creates an unparalleled mechanical strength-to-weight ratio. This innovative production method generates the lightest fiberglass composite seat shells currently on the market; in fact, it guarantees a reduction in total weight of up to 30% compared to traditional production methods. The QRT seats approach the weight of a comparable carbon fiber seat at a lower price point. SPARCO PRO 2000 QRT TECHNOLOGY QRT ultra-light fiberglass composite shell Excellent fitment into small cockpits Adjustable lumbar cushions Excellent ergonomics Fire retardant fabric FIA approved SPARCO PRO 2000 QRT DIMENSIONS

Sparco EVO QRT Racing Seats As Sparco's most well known competition seat, it was a no-brainer to provide the refreshed Evo with Sparco's QRT Ultra-Light Technology. Not content to leave well enough alone, Sparco went a step further by improving the overall fit and feel of the  Sparco Evo QRT. Starting with the shoulder bolsters, Sparco trimmed down the width to help them fit into smaller cars without sacrificing support. Sparco then lowered the side bolsters just enough to improve ingress/egress into/out of the car. Finally, the shoulder belt guides have been raised for improved harness fit in all drivers. With small sports cars in mind (the Sparco Evo QRT fits perfectly in a Miata!), the Sparco Evo QRT is sure be a mainstay at the track! The Sparco EVO QRT series of seats feature the most back angle rake of all Sparco seats for a very comfortable driving position. Available in cloth or vinyl. The Sparco EVO QRT is FIA approved. Sparco EVO QRT Racing Seat Sizes The Sparco EVO series is among the most versatile competition seats we carry, available in the following four sizes to ensure proper fitment: EVO S – Small (up to 32” waist) EVO – Medium (up to 34” waist) EVO L – Large (up to 36” waist) EVO XL – Extra Large (38” waist) What Is Sparco QRT Technology? Designed and developed at the Sparco OEM Composite Laboratory in Italy, QRT is a patented state-of-the-art technical process, based on aerospace technologies. QRT creates an unparalleled mechanical strength to weight ratio. This innovative production method generates the lightest fiberglass composite seat shells currently on the market; in fact, it guarantees a reduction in total weight of up to 30% compared to traditional production methods. The QRT seats approach the weight of a comparable carbon fiber seat at a lower price point. Sparco EVO QRT Racing Seat Features QRT ultra-light fiberglass composite shell Excellent fitment into small cockpits Four Sizes: Small through XL Excellent ergonomics Fire retardant fabric Special non-slip fabric FIA 8855-1999 approved Dimensions EVO S Dimensions: EVO Dimensions: EVO L / XL Dimensions:

D1-067 Girodisc Ford S550 Mustang (w/ Brembo) Front Replacement Rings Optimize your Mustang’s braking performance with Girodisc D1-067 380mm front replacement rings. These precision-machined rotors are direct replacements for Girodisc’s two-piece systems and bolt to your existing aluminum hats using the included floating hardware kit. Built from Girodisc’s proprietary high-carbon cast iron, these rings deliver exceptional heat resistance, fade control, and consistent braking feel during both street and track use. Vehicle Fitment Compatible with:• Ford Mustang GT (S550, 2015–2023) with Performance Pack (Brembo 6-piston front brakes)• Ford Mustang GT350 (2016–2020)• Ford Mustang Mach 1 (2021–2023)Note: Designed exclusively for Girodisc 380mm two-piece front rotor systems. Not compatible with OEM one-piece rotors or carbon-ceramic assemblies. Features • Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 380mm two-piece front rotors• CNC-machined from high-carbon cast iron for superior durability and heat management• Directional curved vanes increase airflow and cooling efficiency• Maintains OEM brake bias, ABS, and traction control calibration• Precision-balanced to eliminate vibration and ensure smooth braking• Designed exclusively for Girodisc aluminum hats Specifications • Diameter: 380 mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and complete hardware kit• Sold/priced per pair Girodisc D1-067 Ford S550 Mustang Front Ring FAQs Will these fit OEM Mustang Brembo rotors? No. These replacement rings are designed specifically for Girodisc aluminum hats and cannot mount to OEM one-piece Brembo rotors. What brake pads pair best with these rotors? For street and spirited driving, Ferodo DS2500 pads are excellent. For heavy track use, Pagid RSL29 or Carbotech XP12 deliver superior bite and fade resistance. Are these rotors directional? Yes. Each rotor is labeled for left and right sides. Proper installation ensures the internal vanes draw air through the rotor for maximum cooling under load. What torque should be applied to the hardware bolts? Torque to 12 ft-lbs (16 Nm) using blue Loctite. After one complete heat cycle, recheck torque to ensure proper float and hardware integrity. Upgrade your Mustang’s stopping performance with Girodisc D1-067 380mm front replacement rings — engineered for cooling efficiency, reduced fade, and consistent braking feel lap after lap.

D1-091 Girodisc Ford S197 Mustang GT500 ('13–'14) Front Replacement Rings Maintain your GT500’s braking dominance with Girodisc D1-091 380mm front replacement rings. These performance-engineered rotors are direct replacements for Girodisc’s two-piece systems, bolting to your existing aluminum hats using the supplied floating hardware kit. Each ring is precision-machined from Girodisc’s proprietary high-carbon cast iron for exceptional heat capacity, fade resistance, and consistent braking performance through repeated high-speed stops. Vehicle Fitment Compatible with:• Ford Mustang Shelby GT500 (S197, 2013–2014)• Compatible with factory Brembo 6-piston caliper setup (Girodisc system only)Note: Designed exclusively for Girodisc 380mm two-piece front rotor systems. Not compatible with OEM one-piece or carbon-ceramic discs. Features • Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 380mm two-piece front rotors• High-carbon iron construction for superior heat management and wear resistance• Directional curved vanes promote efficient cooling and airflow• Maintains OEM brake bias, ABS, and traction control calibration• Precision-balanced to minimize vibration and optimize pedal feel• Designed exclusively for Girodisc aluminum hats Specifications • Diameter: 380 mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and full hardware kit• Sold/priced per pair Girodisc D1-091 Ford S197 Mustang GT500 ('13–'14) Front Replacement Ring FAQs Can these rings mount to OEM GT500 rotor hats? No. The D1-091 rings are made for Girodisc aluminum hats and are not compatible with factory one-piece or aftermarket cast iron rotors. What pad compounds pair best with these rotors? For street and occasional track use, Ferodo DS2500 or Hawk HPS 5.0 pads are ideal. For track-only setups, use Pagid RS29 or Carbotech XP12 for optimal bite and fade resistance. Do these rotors reduce brake fade compared to OEM? Yes. The two-piece floating design and directional vane structure significantly reduce heat buildup and resist warping during heavy use. What torque spec is required for the hardware bolts? Tighten all hardware to 12 ft-lbs (16 Nm) with blue Loctite applied. After one complete heat cycle, recheck torque to confirm proper float and safety. Upgrade your GT500’s braking precision and endurance with Girodisc D1-091 380mm front replacement rings — engineered for high-heat performance, balance, and repeatable control at any speed.

Girodisc Corvette C6 ZR1 Rear Replacement Rings Restore top-tier braking performance on your C6 ZR1 with Girodisc rear replacement rings. Designed as a direct fit for Girodisc two-piece rotor assemblies, these rings maintain factory brake balance and deliver superior cooling, consistent pedal feel, and long-lasting durability under extreme braking loads. Vehicle Fitment Compatible with:• Chevrolet Corvette C6 ZR1 (2009–2013)Note: These are replacement rotor rings only. They bolt directly to existing Girodisc aluminum hats and include new hardware for installation. Precision Replacement for Maximum Performance Each Girodisc rotor ring is machined from a proprietary high-carbon iron casting formulated for superior heat tolerance and structural integrity. The curved vane internal design acts as a centrifugal pump, drawing cool air through the disc to reduce operating temperatures and prevent brake fade during extended track sessions. When paired with Girodisc’s floating hat assemblies, these rings provide smooth, quiet operation while maintaining optimal braking balance. Features • Direct replacement for Girodisc rear rotors on the C6 ZR1• Machined from Girodisc proprietary high-carbon iron• Curved directional vane design enhances airflow and cooling• Includes new high-strength hardware kit for reassembly• Compatible with Girodisc aluminum hats only• Made and machined in the USA• Sold/priced per pair Specifications • Application: Rear axle• Vehicle: Chevrolet Corvette C6 ZR1 (2009–2013)• Material: High-carbon cast iron• Includes replacement hardware• Made in the USA• Sold/priced per pair Girodisc D2-184 Replacement Ring FAQs: Are these complete rotors? No. The D2-184 rings are replacement friction rings only and are designed to bolt to your existing Girodisc aluminum hats using the included hardware. Do they fit factory GM rotors? No. These rings are made exclusively for Girodisc two-piece rotor assemblies and will not fit OEM or other aftermarket hats. What comes in the box? Each set includes two high-carbon iron rings and all new mounting hardware required for reinstallation. When should I replace my rings? Girodisc recommends replacing rings when they reach minimum thickness or show cracks extending to the edge. This ensures consistent braking performance and safety under high heat. Maintain peak stopping power on your C6 ZR1 with Girodisc D2-184 replacement rings — engineered for durability, rebuildability, and championship-level performance.

Toyota GR Supra, BMW 348mm Front Replacement Rings Restore your braking performance with the Girodisc D1-307 Front Replacement Rings, designed for the Toyota GR Supra and BMW Z4 M40i. These precision-engineered 348mm iron rotor rings are direct replacements for your existing Girodisc two-piece rotors, delivering the same championship-level performance, reduced unsprung weight, and thermal stability that make Girodisc the gold standard for performance braking. Manufactured from Girodisc’s proprietary high-carbon cast iron alloy and machined in the USA, these rotors are built to handle extreme braking forces and high temperatures without fade. If your original Girodisc rotors have reached their wear limit, these replacement rings let you renew your braking setup while reusing your original Girodisc aluminum hats — saving cost without sacrificing quality. Features and Benefits Direct replacements for Girodisc 348mm front two-piece rotors Crafted from proprietary U.S.-poured high-carbon cast iron 48 curved directional vanes maximize airflow and cooling Lightweight two-piece design reduces unsprung mass Includes all new hardware: drive pins, bolts, and washers Engineered, machined, and balanced entirely in the USA Vehicle Fitment 2020+ Toyota GR Supra (A90 / A91) 2019+ BMW Z4 M40i BMW G29 Platform (B58 engine) These rotor rings are designed exclusively for Girodisc aluminum hats and are not compatible with OEM or other aftermarket hat assemblies. Why Choose Girodisc Girodisc performance rotors are trusted by track enthusiasts and professional racers for their ability to handle high thermal loads while maintaining consistent braking feel. The D1-307 front replacement rings deliver the same performance and cooling benefits as a brand-new set — for a fraction of the price. Each ring is optimized for even heat distribution and minimal warping, giving you confident braking under pressure lap after lap. FAQs Do these include the aluminum hats?No. The D1-307 kit includes only the iron rotor rings and a new hardware kit. Your existing Girodisc hats are reused. Are these compatible with factory rotors?No. Girodisc rings are engineered exclusively for use with Girodisc hats and cannot be mounted to OEM or other aftermarket assemblies. Are the rotors directional?Yes. Each rotor features curved internal vanes that must be installed on the correct side for proper cooling and airflow direction. What’s included?Two 348mm front rotor rings (left and right) and a full hardware kit with drive pins, bolts, and washers. Ready to Upgrade? When it’s time to refresh your braking system, the Girodisc D1-307 Front Replacement Rings deliver the unmatched cooling, strength, and consistency that define Girodisc. Perfect for both daily driving and track-day abuse, they’ll keep your Toyota GR Supra or BMW Z4 M40i stopping with confidence. Order your set today from Competition Motorsport and get back to peak performance.

D1-282 Girodisc BMW G8X Front Replacement Rings Rings only, sold as a pair with new hardware. Reuse your existing Girodisc aluminum hats. These rings are engineered for Girodisc hats only and will not fit OE or other aftermarket hats. Vehicle Fitment BMW G87 M2 – Front (for A1-282 kits) BMW G80/G81 M3 – Front (for A1-282 kits) BMW G82/G83 M4 – Front (for A1-282 kits) Quick Refresh, Track-Ready High-carbon iron rings with 72 curved vanes move air efficiently. New drive pins, clips, and Belleville washers restore proper float and clamp force for quiet street manners and durability under heat. Features Replacement rings only; includes new hardware Direct fit for Girodisc A1-282 front rotor kits High-carbon iron; USA-poured and machined 72-vane internal geometry for cooling airflow Sold/priced per pair D1-282 FAQs Minimum thickness? Replace at 34 mm or if any crack reaches the outer edge. Re-use hardware? No — install the included new hardware and torque per instructions. Re-bed pads? Yes — perform a standard bedding procedure after ring replacement.  

BMW G8X Iron Conversion Rear Replacement Rings Renew your braking performance with the Girodisc D2-322 Rear Replacement Rings, designed specifically for the Girodisc A2-322 Iron Conversion rotor system on the BMW G8X platform. Whether your M3 or M4 originally came with carbon ceramics or standard iron rotors, these rings let you restore peak performance without replacing your entire rotor assembly. Each set is precision-machined from Girodisc’s proprietary U.S.-poured high-carbon cast iron, delivering the same championship-level performance and cooling efficiency as your original Girodisc rotors. Built to withstand extreme heat cycles and track abuse, the D2-322 replacement rings bring your braking system back to life with fresh hardware and exact OEM fitment. Features and Benefits Direct replacement rings for Girodisc Iron Conversion Rear Rotors (A2-322) Includes all new attachment hardware – pins, bolts, and washers Machined from proprietary high-carbon cast iron for superior heat capacity and durability 48 curved directional vanes maximize airflow for efficient cooling Lightweight two-piece rotor design reduces unsprung and rotational mass Fully machined, balanced, and assembled in the USA Vehicle Fitment BMW G80 M3 (2021+) BMW G82 M4 (2021+) BMW G83 M4 Convertible (2021+) These replacement rings are designed exclusively for Girodisc Iron Conversion kits (part number A2-322) and will not fit OEM or other aftermarket rotor hats, including factory two-piece assemblies. Why Choose Girodisc Girodisc has earned its reputation as the leader in performance braking systems, offering precision-engineered components built for the demands of modern sports cars. Each rotor ring is designed to provide consistent braking, optimized cooling, and maximum longevity. The D2-322 replacement set lets you keep your original Girodisc hats while restoring the braking response and confidence you expect from your G8X M car. FAQs Do these include the aluminum hats?No. The D2-322 kit includes only the iron rotor rings and new hardware. You will reuse your existing Girodisc hats from the A2-322 Iron Conversion kit. Are these compatible with OEM BMW carbon ceramic or two-piece rotors?No. These are only compatible with Girodisc Iron Conversion rotor hats (A2-322) and cannot be used with OEM or other aftermarket assemblies. Are they directional?Yes. Each rotor ring has curved internal vanes designed for optimal airflow and cooling when installed on the correct side. What’s included in the box?A pair of rear replacement rings (left and right) and a complete hardware kit with new drive pins, bolts, and washers. Ready to Upgrade? If your Girodisc iron conversion rotors have reached their wear limit, the D2-322 Rear Replacement Rings will bring your BMW M3 or M4 braking system back to its peak. Experience the legendary cooling and stopping performance that make Girodisc the go-to choice for track and street enthusiasts alike. Order your set today from Competition Motorsport and get back to maximum braking confidence.

D2-318 Girodisc Cadillac CT4-V Blackwing Rear Replacement Rings D2-318 rear replacement rings are sold in pairs with new hardware. Reuse your existing Girodisc aluminum hats. Rings are designed exclusively for Girodisc hats and will not fit OE or other aftermarket hats. D2-318 Vehicle Fitment Cadillac CT4-V Blackwing – Rear (for A2-318 kits) Cost-Effective Service High-carbon iron rings with curved vanes provide consistent performance under repeated braking. New drive pins, clips, and Belleville washers restore proper float and clamping force. Features Replacement rings only; includes hardware Direct fit for Girodisc A2-318 rear rotor kits High-carbon iron; USA-poured and machined Curved vane internal design for cooling airflow Sold/priced per pair D2-318 Girodisc Cadillac Rear Replacement Rings FAQs What’s the recommended minimum thickness? Replace rear rings at 26 mm or sooner if any crack reaches the outer edge. Do I need to re-bed pads? Yes — re-bed after ring installation for optimal friction transfer. Can I mix these with OE front rotors? Yes, but best results come from matching front and rear Girodisc assemblies. Hardware reuse? Use the supplied new hardware; do not reuse worn pins/springs.

D1-311 Girodisc Audi B9 S4, S5, SQ5 Front Replacement Rings These D1-311 front replacement rings are sold in pairs with new hardware. Reuse your existing Girodisc aluminum hats. Rings are engineered exclusively for Girodisc hats and will not fit OE or other aftermarket hats. Vehicle Fitment Audi S4 (B9) – Front (for A1-311 kits) Audi S5 (B9) – Front (for A1-311 kits) Audi SQ5 (B9) – Front (for A1-311 kits) Service-Friendly Refresh High-carbon rings with curved vanes manage heat under repeated stops. New drive pins, clips, and Belleville washers restore the floating interface. Features Replacement rings only; includes hardware For Girodisc A1-311 front rotor kits High-carbon iron, machined in the USA Curved vane geometry for airflow D1-311 FAQs When to replace? Replace at the recommended service thickness or if a crack reaches the outer edge. Torque specs? Follow the included Girodisc instructions for torque and sequence. Pad rebedding? Yes—rebed pads after ring replacement. Related Products A1-311 Girodisc Audi B9 S4, S5, SQ5 Front Rotors A2-130 Girodisc Audi B8/B9 Rear Rotors D2-130 Girodisc Audi 330mm Rear Replacement Rings

Girodisc Mercedes Rear Replacement Rings Maintain the stopping power of your Mercedes AMG with Girodisc D2-123 360mm rear replacement rings. These precision-machined rings are designed to bolt directly to your existing Girodisc two-piece rotor hats using the included floating hardware kit, allowing you to refresh the wear surface without replacing the full assembly. Perfect for both street and track use, these rings restore braking consistency and thermal performance. Vehicle Fitment Compatible with:• Mercedes-Benz C63 AMG (W204 / W205 chassis)• Mercedes-Benz E63 AMG (W212 / W213 chassis)• Mercedes-Benz CLS63 AMG (C218 chassis)• Mercedes-Benz S63 AMG (W222 chassis, steel rotor applications)Note: For use with Girodisc 360mm two-piece rear rotor systems only. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 360mm two-piece rear rotors• CNC-machined from high-carbon cast iron for strength and heat control• Directional curved vanes provide superior cooling under heavy braking• Maintains OEM brake bias and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 360mm• Position: Rear• Material: High-carbon cast iron• Surface: Plain (non-dimpled/slotted)• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair• MSRP: $880.00 Girodisc D2-123 Replacement Ring FAQs Will these fit OEM Mercedes rotors? No. These are engineered specifically for Girodisc two-piece rotor systems and will not bolt to OEM or carbon-ceramic assemblies. Are both sides included? Yes. Each D2-123 kit includes left and right replacement rings along with all new hardware. Why replace just the rings instead of the full rotor? Replacing only the rings saves cost while maintaining your Girodisc hats and original performance characteristics. Do I need to use the new hardware? Yes. Always install the supplied new hardware for proper fitment, safety, and longevity. Refresh your AMG’s braking system with Girodisc D2-123 360mm rear replacement rings — precision-built for heat management, consistency, and fade-free stopping performance on the road or track.

D1-308 Girodisc Mercedes 360mm Front Replacement Rings These Girodisc D1-308 front replacement rings are sold in pairs and include new hardware. They are designed to bolt to existing Girodisc aluminum hats only (not compatible with OEM or other hats). Vehicle Fitment Mercedes-AMG GT (C190) 2017+ – Front (for Girodisc 360 mm kits) Design & Performance High-carbon iron rings with 48 curved internal vanes draw cooling air through the rotor. Floating two-piece construction reduces unsprung weight while reusable aluminum hats allow ring-only replacement. Features Replacement rings only; reuse your Girodisc hats Includes new drive pins, spring clips, and Belleville washers High-carbon iron rings with directional internal vanes Slotted face for stable friction and pad cleanup For Girodisc 360 mm front kits on the listed models D1-308 Girodisc Mercedes 360mm Front Replacement Rings FAQs: How do I know these rings match my hats? Verify your hat part number from the original Girodisc kit; D1‑308 mates to 360 mm front hats used in the listed AMG GT applications. What is the minimum thickness? Replace when worn to Girodisc’s stated discard thickness or if cracks reach an edge (inspect regularly for track use). Do I need threadlocker on the hardware? Use the supplied hardware and follow Girodisc torque/spec sheet; do not substitute fasteners. Can I run these with drilled pads or track pads? Yes. Slotted rings are compatible with OEM and aggressive compounds; follow pad bedding procedures. Related Products A1-308 Girodisc Mercedes 360mm Front Rotors A2-148 Girodisc Mercedes 360mm Rear Rotors D1-308 Girodisc Mercedes 360mm Front Replacement Rings D2-123 Girodisc Mercedes 360mm Rear Replacement Rings