Racing Brake Rotors

Porsche 992 GT3 Cup Rear Replacement Rings Keep your Porsche 992 GT3 Cup performing at its peak with the Girodisc D2-287 Rear Replacement Rings. Designed for serious racers and track-day purists, these high-performance 380x34mm iron rings are direct replacements for Girodisc’s two-piece rear rotors, offering the same exceptional strength, cooling, and balance demanded by professional motorsport. Each ring is machined from Girodisc’s proprietary high-carbon cast iron alloy, poured and finished entirely in the USA. With 48 curved directional vanes and a floating two-piece design, these replacement rings deliver consistent braking performance, improved heat management, and reduced unsprung weight—essential for precision braking on the track. Features and Benefits Direct replacement rings for Girodisc 992 GT3 Cup rear two-piece rotors Machined from proprietary U.S.-poured high-carbon cast iron for superior heat control 48 curved directional vanes maximize airflow and cooling efficiency Lightweight two-piece design minimizes unsprung mass for improved chassis response Includes new hardware: drive pins, bolts, and washers Fully machined, balanced, and assembled in the USA Vehicle Fitment 2022+ Porsche 911 GT3 Cup (992) These rings are designed exclusively for Girodisc aluminum hats and are not compatible with OEM or other aftermarket hat systems. They are a direct replacement for Girodisc rear assemblies used in competition or iron conversion setups. Why Choose Girodisc Girodisc is the benchmark in motorsport braking systems. Built for the extreme thermal loads of track racing, every rotor is precision-balanced and engineered to maintain consistent pad contact, cooling efficiency, and braking stability. The D2-287 replacement rings bring your Girodisc system back to new, ensuring your GT3 Cup continues braking as hard as it accelerates. FAQs Do these include the aluminum hats?No. The D2-287 kit includes only the rotor rings and new hardware. Your existing Girodisc hats are reused. Can these be used with factory Porsche rotors?No. Girodisc replacement rings are designed specifically for Girodisc two-piece rotors and will not fit OEM or other aftermarket systems. Are these rotors directional?Yes. Each rotor ring features curved internal vanes and must be installed on the correct side for proper airflow and cooling. What’s included?A pair of rear rotor rings (left and right) and a full hardware kit with drive pins, bolts, and washers. Ready to Refresh? Restore your Porsche 992 GT3 Cup’s braking system to peak performance with the Girodisc D2-287 Rear Replacement Rings. Designed for race conditions and precision driving, these rings deliver the strength, balance, and cooling efficiency your car deserves. Order your set today from Competition Motorsport and get back to dominating every corner and braking zone.

Lamborghini Huracán STO Rear Replacement Rings Maintain the world-class braking performance of your Lamborghini Huracán STO with Girodisc Rear Replacement Rings. These precision-engineered rings are designed to replace only the iron rotor surface, allowing you to reuse your Girodisc aluminum hats and restore peak braking efficiency with minimal expense. Each pair includes new hardware for a precise, secure installation. Race-Bred Performance, Track-Ready Design Machined in the USA from Girodisc’s proprietary cast iron, these replacement rings feature a curved vane design that actively channels cooling air through the rotor. The result is improved heat management, reduced fade, and consistent pedal feel during demanding conditions on both street and track. Features Sold as a pair and includes new replacement hardware Direct replacement for Girodisc two-piece rear rotors Reuse your existing Girodisc aluminum hats for cost savings Proprietary U.S.-poured cast iron for superior strength and thermal control Curved vane internal design for maximum cooling efficiency Fully machined and assembled in the USA Vehicle Fitment 2021–2025 Lamborghini Huracán STO (rear axle equipped with Girodisc two-piece rotors) Lamborghini Huracán STO Rear Replacement Rings FAQs: Do these fit OEM or factory two-piece rotors? No. These rings are specifically designed for Girodisc two-piece rotor systems and will not fit OEM or other aftermarket rotor assemblies. What’s included in the box? Two replacement rings, new hardware, and detailed installation instructions. Your Girodisc aluminum hats are reused. When should I replace my Girodisc rings? Replace when the rotors reach minimum thickness or if you notice heat checking, cracks, or excessive wear. Do I need to replace both sides at the same time? Yes. Always replace rings in pairs to maintain balanced braking and even wear. Can I install these myself? Installation can be done by experienced DIYers, but Girodisc recommends professional installation to ensure correct torque and safety. Do these rings come balanced? Yes. Girodisc replacement rings are pre-balanced to factory specifications for vibration-free performance. Please note: Girodisc replacement rings are designed for use only with Girodisc hats unless otherwise specified.

Toyota GR Supra, BMW 345mm Rear Replacement Rings Bring your Toyota GR Supra or BMW back to peak braking performance with the Girodisc D2-307 Rear Replacement Rings. These high-performance iron rotor rings are engineered as direct replacements for your Girodisc two-piece rotors, delivering exceptional cooling, reduced weight, and race-proven reliability for street and track use alike. When your Girodisc rotors reach their wear limit, these precision-machined rings let you refresh your braking system without buying new hats. Each ring is crafted from Girodisc’s proprietary U.S.-poured high-carbon cast iron, designed for extreme heat resistance and consistent braking under load. Whether you’re attacking corners on the track or driving hard on the street, Girodisc ensures your braking stays sharp, stable, and fade-free. Features and Benefits Direct replacements for Girodisc 345mm two-piece rear rotors Machined from proprietary high-carbon cast iron for superior durability 48 curved directional vanes optimize airflow and heat dissipation Lightweight design minimizes unsprung and rotational mass Includes all new drive pins, bolts, and washers for installation Fully machined, balanced, and assembled in the USA Vehicle Fitment 2020+ Toyota GR Supra (A90 / A91) 2019+ BMW Z4 M40i BMW G29 Platform (B58 engine) These rings are designed exclusively for Girodisc aluminum hats and will not fit OEM or other aftermarket rotor hats. Why Choose Girodisc Girodisc brake systems are the benchmark for performance and reliability in motorsport-inspired braking. The D2-307 replacement rings allow you to maintain top-tier braking performance at a fraction of the cost of full rotor replacement. Every Girodisc component is precision engineered, race-tested, and built to handle extreme thermal stress with consistent, confident braking lap after lap. FAQs Do these include the aluminum hats?No. The D2-307 kit includes only the iron rotor rings and a new hardware kit. Your existing Girodisc hats are reused. Can these be used with factory rotors?No. Girodisc replacement rings are designed exclusively for Girodisc two-piece rotors and will not bolt to OEM or other aftermarket hats. Are these rotors directional?Yes. Each rotor ring features curved internal vanes and must be installed on the correct side for optimal airflow and cooling efficiency. What comes in the box?A pair of 345mm rear rotor rings (left and right) plus all new drive pins, bolts, and washers. Ready to Upgrade? When it’s time to restore the full stopping power of your Toyota GR Supra or BMW Z4, the Girodisc D2-307 Rear Replacement Rings deliver uncompromising quality, cooling performance, and long-term durability. Order your set today from Competition Motorsport and keep your braking performance at its absolute best.

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.

D2-319 Girodisc Corvette C8 Z06, E-Ray Rear Replacement Rings These Girodisc D2-319 rear replacement rings are sold in pairs and include replacement hardware. They are designed to be used with existing Girodisc aluminum hats on Corvette C8 Z06 and E-Ray rear applications and are not compatible with OEM or other aftermarket hats. Vehicle Fitment Chevrolet Corvette C8 Z06 (Rear) Chevrolet Corvette C8 E-Ray (Rear) Refresh Your Two-Piece Rear Rotors High-carbon iron rings with 48 curved vanes deliver strong cooling and stable performance under heavy braking. Reusing your Girodisc hats keeps long-term service costs low. Features Replacement rings only; reuse Girodisc aluminum hats Sold in pairs with replacement hardware High-carbon iron rings for reliable braking 48 curved vanes for efficient cooling Direct fit for Girodisc A2-319 rear rotor kits D2-319 Girodisc Corvette C8 Z06, E-Ray Rear Replacement Rings FAQs: Do these include hats? No, these are rings only and require existing Girodisc hats. Are they sold individually? No, they are sold as a pair. Are these compatible with OEM hats? No, only Girodisc hats are compatible. Are these suited for track use? Yes, they are built for demanding heat cycles. Related Products A1-320 Girodisc Corvette C8 Z06, E-Ray Front Iron Rotor Conversion A2-319 Girodisc Corvette C8 Z06, E-Ray Rear Rotors D1-320 Girodisc Corvette C8 398mm Front Replacement Rings D2-319 Girodisc Corvette C8 Z06, E-Ray Rear Replacement Rings

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.

Corvette C5, C6 Z51 Rear Replacement Rings When your Corvette’s braking performance starts to fade, the Girodisc D2-324 Rear Replacement Rings are the solution. Designed for the Corvette C5 and C6 Z51, these high-performance iron rings restore the incredible stopping power and thermal control that Girodisc systems are known for. Whether you’re tearing down a straightaway or cruising through canyon roads, this replacement set keeps your braking system fresh, balanced, and ready for action. Each ring is crafted from Girodisc’s proprietary high-carbon cast iron alloy, poured and machined entirely in the USA. The design utilizes curved internal vanes that act like miniature air pumps, constantly pulling cooling air through the rotor faces to minimize heat buildup and reduce brake fade. If your original Girodisc rotors have reached their wear limit, these direct replacements will bring your system back to peak performance without the cost of new hats. Features and Benefits Direct bolt-on replacements for existing Girodisc rear rotors Machined from proprietary U.S.-cast high-carbon iron for strength and heat capacity 48 curved directional vanes maximize airflow and cooling efficiency Lightweight two-piece design reduces unsprung mass and rotational inertia Includes brand-new mounting hardware and detailed installation instructions Manufactured, machined, and balanced in the USA Vehicle Fitment Chevrolet Corvette C5 Z51 (1997–2004) Chevrolet Corvette C6 Z51 (2005–2013) These replacement rings are engineered exclusively for use with Girodisc aluminum hats. They will not fit OEM or other aftermarket hat systems. Why Choose Girodisc Girodisc brake systems are trusted by professional racers and serious enthusiasts who demand precision, consistency, and reliability. Each component is CAD-modeled, race-tested, and built to deliver world-class braking response. Replacing worn rings instead of the entire assembly saves cost while maintaining the exact performance that made your Girodisc setup exceptional in the first place. FAQs Do these include the aluminum hats?No. The D2-324 kit includes only the iron rotor rings and new attachment hardware. Your existing Girodisc hats are reused. Can I use these with factory Corvette rotors?No. Girodisc rings are engineered specifically for Girodisc hats and will not bolt to OEM rotors or other aftermarket systems. What’s included in the box?Two rear rotor rings (left and right) plus all new drive pins, bolts, and washers for reassembly. Are these rotors directional?Yes. Each rotor features curved internal vanes and must be installed on the correct side for optimal airflow and cooling. Ready to Upgrade? Restore your Corvette’s stopping confidence with Girodisc D2-324 Rear Replacement Rings. Experience lighter, cooler, and more consistent braking lap after lap. Order your set today from Competition Motorsport and get back to braking perfection.

Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Rear Replacement Rings These Girodisc D2-357 rear replacement rings are sold in pairs and include all necessary replacement hardware. They are designed to work exclusively with Girodisc aluminum hats. The hats are the only components that should be reused during installation. These rings are not compatible with OEM or other aftermarket hats. Vehicle Fitment • Nissan Skyline GT-R R32 V-Spec (Rear)• Nissan Skyline GT-R R33 (All models – Rear)• Nissan Skyline GT-R R34 (All models – Rear) Serviceable Design, Track-Ready Materials Machined from proprietary high-carbon iron castings formulated to Girodisc’s specifications, these replacement rings deliver excellent thermal stability and wear resistance under high-performance driving conditions. The 2-piece rotor design allows you to refresh the braking surface while retaining the original Girodisc hats, making maintenance both cost-effective and performance-oriented. Features • Sold in pairs with replacement hardware• Designed exclusively for Girodisc aluminum hats• Proprietary high-carbon iron rings for consistent braking• Cost-effective way to refresh worn rotors• High-quality construction made in the USA Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Rear Replacement Rings FAQs: Do these include new hardware? Yes, all necessary replacement hardware is included with the rings. Can these rings be used with OEM hats? No, they are only compatible with Girodisc aluminum hats for proper fit and safety. Are these rings sold individually? No, they are sold in pairs. What is the correct part number for the rear replacement rings? D2-357 is the part number for Nissan Skyline GT-R rear applications.

Girodisc Replacement Rear Rotor Rings for Lotus Emira D2-388 Vehicle fitment • 2022+ Lotus Emira (rear axle) When the time comes to service your Lotus Emira’s rear brakes, the Girodisc D2-388 replacement rotor rings restore full performance without the cost of replacing the complete assembly. Designed to mount directly onto your existing A2-388 hats, these rings deliver the same high-carbon iron strength, curved-vane cooling, and track-ready performance as your original Girodisc setup. Durable, high-performance replacement rings Each ring is machined from Girodisc’s proprietary high-carbon iron alloy, engineered for thermal stability and durability under repeated heavy braking. The 48 curved internal vanes work like a centrifugal pump to draw air through the hub, keeping temperatures down during demanding street or track use. Because the hats are fully reusable, you only need to replace the rings — saving money while keeping your braking system race-ready. D2-388 Features • Direct replacement rings for Girodisc A2-388 rear rotor assemblies• 350 mm diameter × 32 mm thickness• Proprietary high-carbon iron metallurgy• 48 curved-vane internal cooling design• Designed and manufactured in-house in Bellingham, WA• Reuses your existing Girodisc aluminum hats and hardware• Recommended minimum thickness: 30 mm Note: These are rotor rings only. Hats and hardware are not included; designed for use with Girodisc A2-388 hats. Frequently Asked Questions Do these come with hats or hardware? No. The D2-388 kit includes rotor rings only. You’ll reuse your Girodisc A2-388 hats and hardware. How do I know when it’s time to replace the rings? Replace them when thickness reaches 30 mm or when cracks extend to the edge of the ring. Are these rings track-capable? Absolutely. They are built to handle repeated heat cycles while remaining compliant for street driving. Do I need special tools for installation? Standard shop tools are sufficient, but careful torqueing is required. Professional installation is recommended if you are not experienced with brake assembly.

Girodisc 328x28mm Replacement Rings (D54) Need new rings for your Brembo or StopTech big brake kit? Girodisc has you covered. These 328x28mm replacement rings are 100% plug-and-play with your existing hats, offering factory-fit compatibility, superior cooling, and precise braking performance. Each kit includes new floating pin hardware, so installation is seamless and secure. Vehicle Fitment These replacement rings fit Girodisc, Brembo, and StopTech two-piece rotor systems utilizing 328x28mm discs. Ideal for performance and track-focused vehicles that need consistent braking performance and rebuildable rotor assemblies.Note: These are friction rings only and install onto existing aluminum hats using the included hardware. Precision-Built for Performance The disc is made from Girodisc’s proprietary cast iron alloy, poured in the USA and machined in-house to exacting tolerances. Each rotor uses 48 curved directional vanes designed to function as a centrifugal pump, drawing air through the rotor to keep temperatures stable under high-stress braking. This engineering ensures exceptional fade resistance, consistent pedal feel, and extended rotor life — perfect for both street and circuit use. Features • Direct replacement for Girodisc, Brembo, and StopTech 328x28mm applications• Includes new floating hardware kit (two sets)• High-carbon iron alloy for strength and crack resistance• 48 curved vanes for efficient heat evacuation• Machined and balanced in the USA• Bolt-on fitment with existing aluminum hats• Sold/priced per pair Specifications • Application: 328x28mm two-piece rotor systems (D54)• Material: Proprietary high-carbon cast iron• Vane count: 48 curved directional• Includes: Two rotor rings and two hardware kits• Made in the USA• Sold/priced per pair Girodisc GD328.28.54 Replacement Ring FAQs Will these fit my Brembo or StopTech big brake kit? Yes — these are designed to bolt directly to existing 328x28mm hats for both Brembo and StopTech systems using the D54 configuration. Do the replacement rings include hardware? Yes. Each pair ships with two complete hardware kits for installation, including new floating pins, washers, and bolts. Do I need to buy new hats? Not unless your existing hats are damaged. Girodisc rings are made to reuse your original hats for cost-effective rebuilds. Can these be used for racing? Absolutely. Girodisc’s metallurgy and vane design are track-proven for endurance and sprint racing, providing stable, fade-resistant performance. Rebuild your Brembo or StopTech big brake kit the right way with Girodisc GD328.28.54 328x28mm replacement rings — precision, performance, and value engineered for serious braking.

FITS: BREMBO / STOPTECH 332x32mm BIG BRAKE KITS REPLACEMENT ROTOR DISCS ONLY, DOES NOT INCLUDE ALUMINUM HAT. Competition Motorsport is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country.  We ship most products same or next business day to ensure we meet your delivery deadline. The GiroDisc replacement rotor system is a direct rotor disc replacement for the GiroDisc 2-piece hat and rotor and no modifications are necessary.   The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance.  The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat.  The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement to minimize replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) The Girodisc GD355.32.52 Replacement Rotor Rings (D52) are precision-built replacements for Girodisc two-piece rotor systems using the D52 configuration. Sized at 355mm x 32mm, these genuine Girodisc rings restore full braking performance while allowing you to reuse your existing aluminum hats and floating hardware, saving time and cost without compromising quality. Precision Engineering for Long-Term Performance Each Girodisc replacement ring is manufactured in-house in the USA from Girodisc’s proprietary cast iron alloy, designed to handle the extreme heat and stress of high-performance driving. The curved vane internal design acts as a centrifugal air pump, increasing airflow through the rotor to reduce operating temperatures and prevent fade. These rings are machined to exact tolerances and include a new hardware kit for a complete, bolt-on installation. Features • Dimensions: 355mm x 32mm (D52 configuration)• Direct replacement for Girodisc two-piece D52 systems• Reuses existing Girodisc aluminum hats• Proprietary cast iron alloy poured and machined in the USA• Curved vane internal geometry for efficient cooling• Includes new hardware for installation• Directional vanes for left and right rotors• Sold/priced per pair Vehicle Fitment The Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) fit Girodisc D52-based two-piece systems used on:• Porsche Cayman / Boxster (Girodisc 355mm D52 kits)• BMW M2 / M3 / M4 (Girodisc 355mm D52 front or rear systems)• Audi S4 / S5 (Girodisc 355mm D52 setups)• Subaru WRX STI with Girodisc D52 355mm conversion• Other high-performance applications using Girodisc D52 hat patternAlways verify your hat pattern and rotor dimensions match the D52 specification before ordering. Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) FAQs What’s included in the kit? Two iron rotor rings (left and right) and a full set of new mounting hardware for reassembly. Do I reuse my aluminum hats? Yes. These rings are designed to bolt directly to your existing Girodisc hats using the included hardware kit. Are they compatible with OEM or other brands? No. Girodisc rings are engineered specifically for Girodisc aluminum hats and hardware. Are the rotors directional? Yes. Each rotor features curved vane geometry for left and right installation, ensuring optimal airflow and cooling. What material are they made from? Girodisc’s proprietary cast iron alloy provides high strength, excellent thermal stability, and consistent friction under extreme conditions. Are they sold as a set? Yes. The Girodisc GD355.32.52 355x32mm Replacement Rotor Rings (D52) are sold and priced per pair, including all required hardware. Restore factory-level braking performance and reliability with Girodisc GD355.32.52 Replacement Rotor Rings (D52)—precision-engineered in the USA for unmatched quality, cooling, and endurance.

Girodisc GD355.32.62 355x32mm Replacement Rotor Rings (Wide Annulus) The Girodisc GD355.32.62 Replacement Rotor Rings (Wide Annulus) are precision-engineered to replace worn iron rings on Girodisc two-piece brake systems using the D62 hat configuration. These 355x32mm rings are crafted for performance vehicles utilizing Brembo big brake kits that require a wide annulus pad contact area. Restore Performance with Genuine Girodisc Components Manufactured in the USA from Girodisc’s proprietary cast iron alloy, these rings are engineered for maximum strength, heat resistance, and consistent friction. The wide annulus design provides a larger pad contact area for improved wear balance and braking stability. Each rotor features directional curved vanes that act as a centrifugal pump, pulling cool air through the disc to minimize fade and maintain optimal performance under track conditions. Features • Dimensions: 355mm x 32mm (D62 Wide Annulus)• Direct replacement rings for Girodisc two-piece D62 systems• Designed for use with wide annulus Brembo calipers and pads• Proprietary cast iron alloy poured and machined in the USA• Curved vane internal geometry for maximum cooling• Reuses Girodisc aluminum hats• Includes new hardware for installation• Sold/priced per pair Vehicle Fitment The Girodisc GD355.32.62 355x32mm Replacement Rotor Rings (Wide Annulus) fit Girodisc D62-based systems commonly used on:• Brembo 4-piston and 6-piston big brake kits (355mm applications)• Porsche Cayman / Boxster (Brembo GT 355mm systems)• Subaru WRX STI (Brembo GT wide annulus 355mm setup)• Mitsubishi Evo X with Brembo 355mm upgrade• BMW M2 / M3 / M4 with Brembo 355mm GT kitsAlways verify your hat bolt pattern and pad annulus match the D62 configuration before ordering. Girodisc GD355.32.62 355x32mm Replacement Rotor Rings (Wide Annulus) FAQs What does “wide annulus” mean? It refers to the pad contact area width on the rotor. Wide annulus rotors are designed for Brembo GT calipers using pads with a broader friction face. Can I reuse my aluminum hats? Yes. These replacement rings are designed to bolt directly to Girodisc aluminum hats using the included hardware. Do these include hardware? Yes. Each kit includes a complete set of new bolts, washers, and drive pins for proper installation. Are the rings directional? Yes. Each rotor features left and right curved vane geometry for optimal cooling and airflow direction. Do they fit OEM or other aftermarket hats? No. Girodisc replacement rings are specifically machined for Girodisc D62 aluminum hats and are not compatible with other brands. Are they sold as a pair? Yes. The Girodisc GD355.32.62 355x32mm Replacement Rotor Rings (Wide Annulus) are sold and priced per pair and include a complete hardware kit. Keep your braking system at peak performance with Girodisc GD355.32.62 355x32mm Replacement Rotor Rings (Wide Annulus)—the perfect OEM-quality solution for maintaining the precision, cooling, and durability your Girodisc system was designed for.

380x28mm Replacement Rotor Rings (D54) Refresh your Girodisc braking system with the GD380.28.54 Replacement Rings, designed for the D54 380x28mm two-piece rotor assemblies. When your existing Girodisc rotors reach their wear limit, these precision-engineered replacement rings restore braking performance, cooling efficiency, and stopping confidence—without the need to replace your aluminum hats. Each ring is precision-machined in the USA from Girodisc’s proprietary high-carbon cast iron alloy, delivering exceptional thermal stability, strength, and fade resistance under the most demanding driving conditions. Whether on the street or at the track, these 380x28mm rings keep your braking consistent, smooth, and powerful lap after lap. Features and Benefits Direct replacements for Girodisc D54 380x28mm two-piece rotors Machined from proprietary U.S.-poured high-carbon cast iron for superior durability 48 curved directional vanes maximize airflow and cooling capacity Lightweight two-piece design reduces unsprung mass and improves suspension response Includes all new drive pins, bolts, and washers for installation Fully machined, balanced, and assembled in the USA Compatibility Designed exclusively for Girodisc D54 380x28mm rotor assemblies. These rings are only compatible with Girodisc aluminum hats and are not designed for use with OEM or other aftermarket two-piece rotor systems. Why Choose Girodisc Girodisc is trusted worldwide for precision-engineered braking components that excel under heat and stress. The GD380.28.54 replacement rings embody the brand’s motorsport heritage, ensuring consistent pedal feel, superior cooling, and long-lasting performance. Replacing just the rings instead of the entire rotor system saves cost while preserving the exceptional quality of your Girodisc setup. FAQs Do these include the aluminum hats?No. The GD380.28.54 kit includes only the iron rotor rings and a complete hardware kit. Your existing Girodisc hats are reused. Are these compatible with OEM rotors?No. Girodisc replacement rings are designed solely for Girodisc two-piece rotors and will not fit OEM or other aftermarket assemblies. Are they directional?Yes. Each ring features curved internal vanes that must be installed on the correct side for proper cooling and airflow. What’s included?A pair of 380x28mm rotor rings (left and right) and a full hardware kit including drive pins, bolts, and washers. Ready to Refresh? Bring your Girodisc system back to full braking performance with the GD380.28.54 380x28mm Replacement Rings. Designed for high-performance street and track use, they deliver the strength, balance, and cooling efficiency that define Girodisc. Order your set today from Competition Motorsport and keep your braking power at its absolute best.

Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) The Girodisc GD380.32.52 Replacement Rotor Rings (D52) are designed as direct replacements for worn rotor rings in your existing Girodisc two-piece brake system. Manufactured in-house to the same exacting standards as all Girodisc components, these 380x32mm rings restore your braking performance while allowing you to reuse your original aluminum hats and hardware. Restore Peak Braking Performance Each Girodisc replacement ring is cast from Girodisc’s proprietary iron alloy in the USA and precision machined to exacting tolerances. The curved vane internal design functions as a centrifugal air pump, improving airflow and heat dissipation to keep temperatures consistent lap after lap. These replacement rings include new hardware and are ready to bolt directly onto your existing Girodisc hats. Features • Size: 380mm x 32mm (D52)• Direct replacement rotor rings for Girodisc two-piece systems• Compatible with Girodisc aluminum hats using D52 pattern• Proprietary cast iron alloy poured and machined in the USA• Curved vane internal geometry for maximum cooling efficiency• Includes new hardware kit for installation• Reuses existing aluminum hats• Sold/priced per pair Vehicle Fitment The Girodisc GD380.32.52 Replacement Rotor Rings (D52) fit multiple Girodisc brake systems used on high-performance vehicles, including:• Porsche 997.2 Turbo / Turbo S• Porsche 991 Carrera / Carrera S (with Girodisc 380mm upgrade kit)• Audi R8 V8 / V10 (with Girodisc 380mm rear kit)• McLaren 540C / 570S / 570GT (with Girodisc D52-based systems)• BMW F8X M2 / M3 / M4 (with Girodisc 380mm retrofit kits)Always confirm your hat pattern and bolt circle match the D52 specification before ordering. Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) FAQs What is included with these replacement rings? The kit includes two 380x32mm iron rotor rings (left and right) along with all new hardware for installation. Can I reuse my existing aluminum hats? Yes. These replacement rings are designed to bolt directly to your Girodisc aluminum hats using the provided hardware. Are the rings directional? Yes. Each rotor has directional curved vanes—ensure left and right sides are installed correctly for proper cooling airflow. What materials are used? The rings are made from Girodisc’s proprietary cast iron alloy, known for high heat capacity, durability, and consistent friction performance. Do these fit OEM or other aftermarket hats? No. Girodisc replacement rings are engineered specifically for Girodisc hats and may not fit other brands’ hardware or bolt patterns. Are they sold individually or as a set? The Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) are sold and priced per pair, including all required installation hardware. Maintain peak braking performance with genuine Girodisc GD380.32.52 Replacement Rotor Rings (D52)—crafted in the USA for reliability, strength, and precision fitment.

Girodisc 380x35mm Replacement Rotor Rings (D52) Need new rings for your Brembo or StopTech big brake kit? Girodisc has you covered. These 380x35mm replacement rings are 100% plug-and-play with your existing aluminum hats, offering a perfect fit and race-proven performance. Each set includes new floating pin hardware for a complete refresh of your braking system. Vehicle Fitment These Girodisc 380x35mm replacement rings fit a variety of big brake kits using 380x35mm rotors, including systems from Brembo, StopTech, and other performance brands. Verify your original rotor size and hat configuration before ordering to ensure compatibility.Note: These are replacement friction rings only and must be installed on existing Girodisc or compatible aluminum hats using the included hardware. Precision Engineering, Made in the USA The rotor rings are machined from Girodisc’s proprietary high-carbon cast iron, poured and finished in-house in the USA. Each rotor utilizes 72 curved directional vanes, engineered to act as a centrifugal air pump that pulls cooling air through the disc to lower operating temperatures and prevent fade during extreme braking. Whether on the street or at the track, Girodisc ensures consistent braking, superior pedal feel, and unmatched thermal control. Features • Direct-fit replacement for 380x35mm Girodisc, Brembo, and StopTech applications• Includes two new floating hardware kits• 72 curved vanes for maximum cooling efficiency• Proprietary high-carbon iron for strength and crack resistance• Machined, balanced, and finished in the USA• Bolt-on installation with existing hats• Sold/priced per pair Specifications • Diameter: 380mm• Thickness: 35mm• Vane Count: 72 curved directional• Position: Front or rear, depending on application• Includes: Two rotor rings and two complete hardware kits• Made in the USA• Sold/priced per pair Girodisc GD380.35.52 Replacement Ring FAQs Will these fit my Brembo or StopTech big brake kit? Yes — these are a direct bolt-on for systems using 380x35mm rotors and compatible aluminum hats. Do the rings come with new hardware? Yes. Each pair includes two complete hardware kits with new floating pins, bolts, and washers. Do I need to buy new hats? Not unless your existing hats are damaged. Girodisc rings are designed for re-use with your current hats to save cost and installation time. Can these be used for track driving? Absolutely. Girodisc’s 72-vane cooling design and proprietary iron alloy make these ideal for high-heat track conditions and extended endurance use. Rebuild your Brembo or StopTech big brake kit with confidence using Girodisc GD380.35.52 380x35mm replacement rings — precision-built, track-tested, and proudly made in the USA.