Girodisc Rotors

Girodisc Alfa Romeo 4C Rear Rings Restore the razor-sharp braking feel of your Alfa Romeo 4C with Girodisc D2-078 rear replacement rings. Designed as direct replacements for Girodisc two-piece rotors, these 305mm rings bolt to your existing Girodisc aluminum hats using the included floating hardware kit. Refresh the wear surface without replacing the full rotor assembly, maintaining performance and reducing long-term maintenance costs. Vehicle Fitment Compatible with:• Alfa Romeo 4C Coupe (rear)• Alfa Romeo 4C Spider (rear)Note: For vehicles equipped with Girodisc 305mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair with new floating hardware kit• Direct replacements for Girodisc 305mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes enhance airflow and reduce heat buildup• Maintains factory brake balance and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 305mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair• MSRP: $630.00 Girodisc D2-078 Alfa Romeo 4C Rear Replacement Ring FAQs Are these compatible with the OEM Alfa Romeo 4C brake setup? No. These are designed only for Girodisc two-piece rotor hats and will not fit factory one-piece rotors. Will these work with upgraded street or track pads? Yes. They’re compatible with all major pad brands including Ferodo, Pagid, and Hawk for both street and track driving. Do these require any modifications for installation? None. They bolt directly to your existing Girodisc aluminum hats using the included floating hardware. What’s the benefit of Girodisc over the OEM steel rotors? Girodisc’s two-piece floating design reduces unsprung weight, improves cooling, and maintains consistent braking under high temperatures. Enhance your Alfa Romeo 4C’s braking system with Girodisc D2-078 305mm rear replacement rings — precision-engineered for lightweight performance, cooling efficiency, and track-ready reliability.

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

Ford S197 Mustang GT500 ('13–'14) Rear Replacement Rings Refresh the stopping power on your 2013–2014 Shelby GT500 with Girodisc Rear Replacement Rings. These direct-fit rings let you reuse your existing Girodisc aluminum hats, restoring like-new braking performance while keeping costs and downtime low. Each pair arrives with new hardware and clear instructions for a clean swap. Engineered to run hard and cool Girodisc rings are machined in the USA from proprietary cast iron and use a race-developed curved vane design that pumps cooling air through the disc. The result is consistent pedal feel and fade resistance whether you’re carving back roads or running open-track sessions. Features Sold as a pair; includes new replacement hardware Direct replacement for existing Girodisc two-piece rear rotors Reuse your Girodisc aluminum hats to save money and time Proprietary U.S.-poured cast iron for durability and heat control Curved vane internal design promotes efficient cooling Precision machined and finished in the USA Vehicle Fitment 2013–2014 Ford Mustang Shelby GT500 (S197 chassis) equipped with Girodisc two-piece rear rotors Ford S197 Mustang GT500 ('13–'14) Rear Replacement Rings FAQs: Do these fit OEM or other brands’ two-piece rotors? These rings are designed only for Girodisc hats and will not fit OEM two-piece systems or other aftermarket brands unless specifically noted. What’s included in the box? Two replacement rings with new hardware and installation instructions. You’ll reuse your existing Girodisc aluminum hats. When should I replace my rings? Replace when the rotor reaches minimum thickness or if you see heat checking, cracks, or other signs of distress during inspection. Do I need to replace both sides at once? Yes, replacing rings in pairs keeps braking performance balanced side-to-side. Can I install these at home? Experienced DIYers can perform the swap, but professional installation is recommended to ensure correct fastener torque and safety. Do I need new pads? It’s a good time to inspect pads; switching to a compound matched for iron rotors can optimize bite and wear.

Girodisc Porsche 993 Rear Rings Restore your Porsche 993’s braking performance with Girodisc D2-103 rear replacement rings. These precision-engineered 322mm rings are designed to bolt directly onto your existing Girodisc aluminum hats, providing a cost-effective refresh of your two-piece rotor system. Each set includes both left and right rings plus all necessary new floating hardware for a secure, factory-quality installation. Vehicle Fitment Compatible with:• Porsche 993 Carrera / Carrera S• Porsche 993 Turbo• Porsche 993 Carrera 4 / 4SNote: For use with Girodisc 322mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair and includes new floating hardware kit• Direct replacements for Girodisc 322mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Curved directional vanes improve cooling and reduce fade• Maintains OEM brake balance and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 322mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and complete hardware kit• Sold/priced per pair Girodisc D2-103 Replacement Ring FAQs Will these fit factory Porsche rotors? No. These are designed specifically for Girodisc two-piece rotor systems and will not bolt to factory or PCCB rotors. Are both sides included? Yes. Each D2-103 kit includes both left and right replacement rings with all new hardware. Why replace only the rings? Replacing just the rings allows you to reuse your Girodisc hats, saving cost and maintaining peak braking performance. Do I need to install the new hardware? Yes. Always use the supplied new hardware for proper torque, safety, and fitment accuracy. Upgrade your Porsche 993 braking system with Girodisc D2-103 rear replacement rings — precision-built for cooling, strength, and consistent braking performance on both road and track.

Girodisc BMW E9X 335i Rear Rings Maintain the precise braking feel of your BMW 335i with Girodisc D2-114 rear replacement rings. These direct-fit 328mm rings are designed to bolt onto your existing Girodisc aluminum hats, letting you replace only the rotor surface instead of the full assembly. Each set includes both left and right rings plus a complete floating hardware kit, restoring your braking performance to factory-fresh condition. Vehicle Fitment Compatible with:• BMW 335i / 335is (E90 / E92 / E93 chassis)• BMW 335d (E90 chassis)Note: For vehicles equipped with Girodisc 328mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair with new hardware kit• Direct replacements for Girodisc 328mm two-piece rear rotors• CNC-machined from high-carbon cast iron for improved heat capacity• Directional curved vanes enhance cooling efficiency• Maintains OEM brake bias and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 328mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair• MSRP: $680.00 Girodisc D2-114 Replacement Ring FAQs Will these fit OEM BMW rotors? No. These are designed specifically for Girodisc two-piece rotor systems and will not bolt to factory rotors. Are both sides included? Yes. Each D2-114 kit includes both left and right replacement rings plus a complete hardware set. Why replace only the rings? Replacing just the rings saves cost and retains your Girodisc hats, providing consistent braking and reduced unsprung weight. Do I need to replace the hardware? Yes. Always use the supplied new hardware to ensure safe and precise installation. Upgrade your BMW E9X 335i braking system with Girodisc D2-114 rear replacement rings — precision-engineered for thermal efficiency, strength, and fade-free performance on both street and track.

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.

Girodisc Mercedes Rear Replacement Rings (Dimpled & Slotted) Upgrade your Mercedes AMG’s braking performance with Girodisc D2-123DS 360mm dimpled and slotted rear replacement rings. Designed as direct-fit replacements for Girodisc two-piece rear rotors, these rings bolt to your existing Girodisc aluminum hats using the included floating hardware kit. The dimpled and slotted design enhances bite, clears debris, and helps maintain consistent braking under extreme conditions. 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 vehicles equipped with Girodisc 360mm two-piece rear rotors. Not for OEM or carbon-ceramic systems. Features • Sold as a left/right pair and includes new floating hardware kit• Dimpled and slotted surface increases pad bite and gas evacuation• CNC-machined from high-carbon cast iron for superior heat control• Curved directional vanes provide maximum cooling under load• 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: Dimpled and slotted• Mount type: Floating two-piece system• Includes: Two rings and full hardware kit• Sold/priced per pair• MSRP: $980.00 Girodisc D2-123DS Replacement Ring FAQs Will these fit OEM Mercedes rotors? No. These are engineered for Girodisc two-piece rotor systems and will not fit factory or carbon-ceramic setups. What’s the advantage of the dimpled and slotted design? It improves initial pad bite, helps vent gases, and maintains a cleaner braking surface for consistent stopping power. Are both sides included? Yes. Each D2-123DS kit includes left and right replacement rings plus a complete hardware kit. Do I need to replace the hardware? Yes. Each kit includes new floating hardware that must be used for proper installation and long-term reliability. Enhance your AMG’s braking response with Girodisc D2-123DS 360mm rear replacement rings — the ideal blend of precision, durability, and cooling performance for the street or track.

Girodisc Audi 330mm Rear Rings Restore your Audi’s braking precision with Girodisc D2-130 330mm rear replacement rings. These direct-fit rings are designed to bolt onto existing Girodisc aluminum hats, letting you refresh the wear surface without replacing the entire rotor assembly. Each set includes both left and right rings plus new floating hardware for a complete installation. Vehicle Fitment Compatible with:• Audi S4 (B8, B8.5, and B9 chassis)• Audi S5 (B8, B8.5, and B9 chassis)• Audi A4 / A5 models equipped with Girodisc 330mm two-piece rear rotorsNote: For Girodisc two-piece rotor systems only. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair and includes new floating hardware kit• Direct replacements for Girodisc 330mm two-piece rear rotors• High-carbon cast iron provides excellent heat dissipation and strength• Curved directional vanes improve cooling and reduce fade• Maintains factory brake balance and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 330mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair• MSRP: $580.00 Girodisc D2-130 Replacement Ring FAQs Will these fit OEM Audi rotors? No. These rings are designed exclusively for Girodisc two-piece rotor systems. Are both sides included? Yes. Each D2-130 kit includes both left and right rear replacement rings plus a complete hardware set. Why replace only the rings? It allows you to reuse your Girodisc hats, saving cost while maintaining high braking performance and balance. Do I need to install the new hardware? Yes. Always use the supplied new hardware to ensure proper fitment and safe operation. Upgrade your Audi’s braking system with Girodisc D2-130 330mm rear replacement rings — precision-built for cooling, strength, and dependable stopping power on both street and track.

Girodisc Audi 300mm Rear Replacement Rings Restore your Audi’s braking precision with Girodisc 300mm rear replacement rings. Designed as direct-fit replacements for existing Girodisc two-piece rotor assemblies, these high-carbon iron rings deliver exceptional heat management, reduced unsprung weight, and smooth, fade-resistant braking performance on the street or track. Vehicle Fitment Compatible with:• Audi B5 S4 (with Stasis or 034Motorsport rear big brake kit)• Audi B6 S4 (with upgraded rear 300mm Girodisc system)• Audi B7 S4 (rear 300mm conversion)Note: These are replacement friction rings only and mount directly to existing Girodisc aluminum hats using the supplied hardware kit. Precision-Machined Performance Each Girodisc replacement ring is cast from a proprietary high-carbon iron alloy and machined in the USA for maximum precision and durability. The curved directional vanes inside the rotor act as a centrifugal air pump, pulling cooling air through the disc to dissipate heat efficiently. This design minimizes brake fade, vibration, and cracking — maintaining a consistent pedal feel even under demanding driving conditions. Features • Direct replacement for 300mm Girodisc rear rotor assemblies• Compatible with Audi S4 B5/B6/B7 models using 300mm upgrades• High-carbon iron alloy resists warping and thermal stress• Directional vane design for efficient heat dissipation• Machined, balanced, and finished in the USA• Includes new floating hardware kit• Sold/priced per pair Specifications • Diameter: 300mm• Position: Rear• Material: High-carbon cast iron• Includes: Two rotor rings and full hardware kit• Made in the USA• Sold/priced per pair Girodisc D2-143 Replacement Ring FAQs Will these fit my OEM Audi rear rotors? No — these are designed specifically for Girodisc or compatible two-piece rotor assemblies using 300mm hats. Do they include hardware? Yes, each set includes a full floating hardware kit with new pins, bolts, and washers for secure installation. Can I reuse my Girodisc hats? Yes, these rings are designed to bolt directly to your existing aluminum hats unless the hats are damaged or worn. Are these recommended for track use? Absolutely. Girodisc rotors are engineered to handle repeated thermal cycling and heavy braking typical in track and high-performance driving. Renew your Audi’s braking system with Girodisc D2-143 300mm rear replacement rings — precision-built in the USA for strength, cooling efficiency, and reliable stopping power.

Girodisc Corvette, Camaro Rear Rings The Girodisc D2-145 rear replacement rings are designed for the 390mm Girodisc two-piece rotor systems used on Chevrolet Corvette C7 and Camaro SS/ZL1 models. These precision-engineered rings bolt directly to your existing Girodisc aluminum hats and include all new floating hardware, letting you replace only the wear surface for a cost-effective, high-performance brake refresh. Vehicle Fitment Compatible with:• Chevrolet Corvette C7 (including Grand Sport and Z06)• Chevrolet Camaro SS / ZL1 (6th Gen, 390mm Girodisc rear rotors)Note: For use only with Girodisc 390mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair with full hardware kit• Direct replacements for Girodisc 390mm two-piece rear rotors• CNC-machined from high-carbon cast iron for superior heat capacity• Curved directional vanes improve airflow and cooling• Maintains OEM brake balance and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 390mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair Girodisc D2-145 Replacement Ring FAQs Will these fit factory Corvette or Camaro rotors? No. These are designed specifically for Girodisc two-piece rotor hats and are not compatible with factory or carbon-ceramic setups. Are both sides included? Yes. Each D2-145 kit includes both left and right replacement rings along with a complete hardware kit. Why replace just the rings instead of the full rotor? It allows you to maintain your Girodisc hats, lower cost, and restore braking performance without replacing the full assembly. Do I need to use the new hardware? Yes. The included new hardware must be used to ensure correct fitment and safety. Upgrade your Corvette or Camaro braking performance with Girodisc D2-145 390mm rear replacement rings — precision-built for strength, cooling, and fade-free stopping power on the street or the track.

Girodisc Porsche 380mm Rear Rings The Girodisc D2-146 rear replacement rings are designed as direct-fit replacements for the 380mm Girodisc two-piece rotor system on Porsche 991 and 992 GT3 models. Each set includes left and right rings plus all new floating hardware required for installation, allowing you to restore your braking performance without replacing the full rotor assembly. Vehicle Fitment Compatible with:• Porsche 991 GT3 / GT3 RS (rear, 380mm Girodisc two-piece rotors)• Porsche 992 GT3 / GT3 RS (rear, 380mm Girodisc two-piece rotors)Note: For use only with Girodisc two-piece rotor systems. Not compatible with OEM or PCCB rotors. Features • Sold as a left/right pair and includes new floating hardware• Direct replacements for Girodisc 380mm two-piece rear rotors• Precision CNC-machined from high-carbon cast iron• 48 curved directional vanes improve airflow and heat management• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 380mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair Girodisc D2-146 Replacement Ring FAQs Will these fit OEM Porsche rotors? No. These rings are engineered for Girodisc two-piece rotor systems only and are not compatible with OEM or PCCB setups. Are both sides included? Yes. The D2-146 kit includes both left and right replacement rings along with new floating hardware. Why replace just the rings instead of the full rotor? It saves cost and allows you to retain your Girodisc hats while restoring full braking performance. Do I need to use the new hardware? Yes. Each set includes new hardware that must be used to ensure proper fitment, torque, and reliability. Upgrade your Porsche’s braking performance with Girodisc D2-146 rear replacement rings — engineered for precision, durability, and fade-free performance on both road and track.

Girodisc Corvette C7 Z06 / Grand Sport Rear Replacement Rotor Rings   The Girodisc D2-147 Rear Replacement Rotor Rings are precision-engineered replacements for Girodisc two-piece rear rotors used on the Chevrolet Corvette C7 Z06 and Grand Sport. Designed to restore braking performance and maintain Girodisc’s unmatched cooling efficiency, these rings deliver lightweight strength, balance, and durability for both street and track use. Vehicle Fitment • Chevrolet Corvette C7 Z06 – Rear• Chevrolet Corvette C7 Grand Sport – Rear• Designed for Girodisc two-piece rotor systems• Will not fit OEM or non-Girodisc two-piece rotors High-Performance Construction for the C7 Platform Each Girodisc D2-147 replacement ring is manufactured in the USA using Girodisc’s proprietary high-carbon cast iron alloy, developed for superior strength and thermal stability. The internal curved vane design acts as a centrifugal air pump, forcing cooling air through the disc to minimize fade and maintain consistent braking under the most demanding conditions. Sold as a matched pair, the rings include new hardware and are a direct bolt-on fit to your existing Girodisc aluminum hats. Features • Size: 370mm x 30mm• Direct replacement for Girodisc Corvette C7 Z06 / Grand Sport rear rotors• Proprietary high-carbon iron alloy poured and machined in the USA• Curved vane internal geometry for improved airflow and cooling• Includes full hardware kit (pins, bolts, washers)• Reuses Girodisc aluminum hats• Maintains OEM brake bias and ABS calibration• Sold/priced per pair ($730.00)• Not compatible with OEM or non-Girodisc hats Girodisc D2-147 Corvette C7 Z06 / Grand Sport Rear Replacement Rotor Rings FAQs Can I reuse my Girodisc aluminum hats? Yes. These replacement rings are designed to bolt directly onto your existing Girodisc hats using the supplied hardware kit. Are these compatible with OEM or factory rotors? No. Girodisc rings are designed exclusively for Girodisc two-piece systems and will not fit OEM or other aftermarket hats. What’s included in the kit? Two 370mm rear iron rotor rings (left and right) and all necessary hardware for reassembly. Are the rotors directional? Yes. Each rotor is marked left and right and uses directional curved vanes for optimal cooling and airflow. Do these improve performance over OEM rotors? Yes. Girodisc rotors reduce unsprung weight, improve heat dissipation, and provide consistent braking under high loads, making them ideal for both street and track performance. Are they sold as a set? Yes. The Girodisc D2-147 Corvette C7 Z06 / Grand Sport Rear Replacement Rotor Rings are sold and priced per pair and include all required hardware. Maintain your Corvette’s legendary braking precision with Girodisc D2-147 Rear Replacement Rotor Rings—crafted in the USA for unmatched quality, cooling, and race-proven performance.

Girodisc Porsche 390mm Rear Rotor Rings The Girodisc D2-154 Rear Replacement Rotor Rings are precision-engineered replacements for Girodisc two-piece rear rotors on Porsche GT models. Designed to restore the braking performance, cooling capacity, and balance of your Girodisc system, these rings deliver exceptional quality and durability for both street and track use. Vehicle Fitment • Porsche 991 GT3 / GT3 RS – Rear• Porsche 992 GT3 / GT3 RS – Rear• Porsche 718 GT4 RS – Rear• Designed for Girodisc two-piece rotor systems• Will not fit OEM or non-Girodisc two-piece rotors Track-Proven Engineering for Porsche GT Models Each Girodisc D2-154 replacement ring is cast and machined in the USA using Girodisc’s proprietary high-carbon iron alloy, developed to withstand extreme heat while maintaining consistent performance. The internal curved vane design functions as a centrifugal air pump, drawing air through the rotor to maximize cooling and prevent fade. Sold as a matched pair, these replacement rings include all new hardware and mount directly to your existing Girodisc aluminum hats for a quick and precise installation. Features • Size: 390mm x 32mm• Direct replacement for Girodisc Porsche 991 / 992 GT3, GT3 RS, and 718 GT4 RS rear rotors• Proprietary cast iron alloy poured and machined in the USA• Curved vane internal geometry for optimal cooling and fade resistance• Includes complete hardware kit for installation• Reuses Girodisc aluminum hats• Maintains OEM brake bias and ABS calibration• Sold/priced per pair• Not compatible with OEM or other aftermarket hats Girodisc D2-154 Porsche 390mm Rear Replacement Rotor Rings FAQs Can I reuse my Girodisc aluminum hats? Yes. These replacement rings are designed to bolt directly onto your Girodisc aluminum hats using the included hardware kit. Are these compatible with OEM or other brands? No. Girodisc rings are engineered exclusively for Girodisc two-piece rotor systems and will not fit OEM or other aftermarket hats. What’s included in the kit? Two rear iron rotor rings (left and right) and all new hardware required for installation. Are the rotors directional? Yes. Each rotor features directional curved vanes to ensure optimal cooling—be sure to install left and right sides correctly. Do these improve performance over OEM rotors? Absolutely. Girodisc rotors run cooler, resist warping, and offer superior braking consistency under repeated high-temperature conditions compared to OEM discs. Are they sold as a pair? Yes. The Girodisc D2-154 Porsche 390mm Rear Replacement Rotor Rings are sold and priced per pair and include all necessary hardware for installation. Maintain your Porsche GT car’s world-class braking performance with Girodisc D2-154 Rear Replacement Rotor Rings—crafted in the USA to deliver unmatched cooling, precision, and endurance on track or street.

Girodisc Ford GT350/GT350R Rear Rotor Rings Rear Fitment, Ford Shelby GT350/GT350R with Girodisc A2-162 rotors The Girodisc D1-162 is the direct replacement rotor rings for your Girodisc A2-162 brake rotor kit. This complete kit consists of two new discs (rotor rings) and all replacement hardware. You will re-use the Girodisc aluminum hats from your A2-162 kit and bring your braking feel back to new. Girodisc GT350 Rear Rotor Rings Details Manufacturer: Girodisc Manufacturer Part Number: D2-162 Surface: Slotted Material: Steel Intended for Street/Track Use: Yes For Use with Stock Calipers: Yes Rotor Construction: Vented Rotor Style: Slotted surface Rotor Material: Iron Rotor Finish: Black E-coat Quantity: Sold pair (one axle set) Sold/priced per pair of rings only (does not include center hat and does NOT fit OEM hats.) Girodisc Advantages Girodisc brake kits are seen at every track weekend on very exotic and extreme track cars. What made Girodisc owners leave their OEM rotors and upgrade to a 2 piece Girodisc kit? Less Rotating Mass via two-piece design Grade 12 floating hardware to allow the rotor to grow when heated Curved vane design creates a cooler rotor Significant cost reduction compared to OEM Girodisc Floating Rotor Rings Quality hi-carbon cast iron is the foundation of every Girodisc brake rotor. Every rotor ring is made carefully in house at the Girodisc factory in Washington state. The Girodisc rotor utilizes a curved vane design that was originally developed in racing to act as a centrifugal air pump to force cooling air from the center of the rotor ring to the outside. This principle is similar to what is know as a squirrel cage fan design. By having impellers (vanes) between the two rotor faces, the air is moved radially, from the center outward, changing the direction of the airflow and increasing velocity. This design is mechanically strong, reliable, and very effective. Girodisc Rotor Ring Hardware The Girodisc rotor ring and light-weight aluminum hat have a floating mount system, which utilizes 8 or 10 high strength alloy steel drive pins, manufactured by Girodisc in the USA to their own specifications and cadmium plated for long-lasting corrosion resistance. These drive pins take the load from braking actions while maintaining the axial and radial float between the hat and disc. The drive pins are secured by grade 12 cap screws with hardened washers. In order to keep the rotors from making noise when cold, the pins are mounted with anti-noise spring washers on the rotor side which allow the rotor to grow with heat expansion but eliminate the rattle and noise associated with floating rotors. This float also allows the rotor to self-center between the pads. Girodisc Rotor Ring Replacement Once the Girodisc system is in place, simply replace the cast iron rotor when needed. Your Girodisc replacement rotor rings come complete with two new rotor rings and all required floating rotor hardware. This is a very simple task that is quite fun. The aluminum rotor hat usually does not ever need replacement unless bent or damaged. If you damaged has reached your Girodisc hat, you likely have more than a few other things to replace also. The hat is rugged and overly strong.

Girodisc Honda Civic Type R Rear Rings Refresh the braking performance on your Honda Civic Type R (FK8 or FL5) with the Girodisc D2-166 rear replacement rings. These are direct-fit rings designed to bolt onto your existing Girodisc two-piece rotor hats — complete with new hardware, letting you replace only the outer wear surface while keeping your rotor hats in place. Vehicle Fitment Compatible with:• 2017-2024 Honda Civic Type R (FK8 & FL5) – rear application only, with Girodisc two-piece rotor system Features • Sold as a pair (left & right) and includes new hardware kit• Direct replacement rings for Girodisc two-piece rear rotors• Machined from high-carbon iron for excellent thermal performance and durability• Maintains factory braking bias and ABS functionality when properly installed• Requires Girodisc aluminum hats — not compatible with OEM or other brand hats Specifications • Material: High-carbon cast iron• Mount type: Floating two-piece rotor system• Includes: Two rings and full hardware kit• Position: Rear• Sold/priced per pair Girodisc D2-166 Replacement Ring FAQs Will these fit non-Girodisc rotor hats? No. These replacement rings are only compatible with Girodisc two-piece rotor hats and will not bolt onto OEM or other aftermarket hats. :contentReference[oaicite:1]{index=1} Are both sides included in the kit? Yes. The D2-166 kit contains left and right rear rings along with the required hardware kit for installation. :contentReference[oaicite:2]{index=2} Why replace just the rings instead of the full rotor? Replacing only the rings allows you to refresh the braking surface, maintain the high-quality Girodisc hats, reduce cost, and avoid unnecessary full rotor replacement when the hats are still in good condition. :contentReference[oaicite:3]{index=3} Can I reuse my old mounting hardware? No. New floating hardware is included with each set and should be used for proper fitment and safety. :contentReference[oaicite:4]{index=4} Upgrade your Honda Civic Type R’s braking system with Girodisc D2-166 rear replacement rings — engineered for consistent stops, high performance, and track-ready durability.

Girodisc D2-168 Replacement Rear Rotor Ring Kit REPLACEMENT ROTOR RINGS & NEW INSTALLATION HARDWARE. DOES NOT INCLUDE ALUMINUM HATS. Competition Motorsport is an authorized dealer for Girodisc products. As one of the largest stocking dealers in the country, we ship most Girodisc products the same or next business day to ensure we meet your delivery deadline. These Girodisc replacement rotor rings are direct replacements for the iron discs on your Girodisc two-piece rotors, and no modifications are necessary. New cap screws and washers are included with these replacement rotors. We do not recommend re-using the old hardware. The replacement rotor rings 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 their 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 two-piece Girodisc design allows for rotor ring-only replacement to minimize replacement costs and deliver outstanding performance and cooling. Sold/priced per pair.