GiroDisc Racing Brakes & Technologies
D2-015 Girodisc Ferrari 360 Challenge Rear Replacement Rings
$975.00
Girodisc Ferrari 360 Challenge Rear Rings
Restore your Ferrari 360 Challenge’s race-ready braking performance with Girodisc D2-015 330mm rear replacement rings. Designed as direct-fit replacements for Girodisc two-piece rotors, these rings bolt directly to existing Girodisc aluminum hats using the supplied floating hardware kit. Each rotor ring is precision-machined from high-carbon cast iron for improved heat capacity, faster recovery between braking zones, and consistent pedal feel during competitive sessions.
Vehicle Fitment
Compatible with:• Ferrari 360 Challenge (rear)• Ferrari 360 Modena (with Girodisc 330mm two-piece rotor conversion)Note: Designed for Girodisc 330mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic systems.
Features
• Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 330mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes optimize cooling and airflow• Balanced for reduced vibration under high braking loads• Maintains OEM brake bias and ABS calibration• 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 new hardware kit• Sold/priced per pair
Girodisc D2-015 Ferrari 360 Challenge Rear Ring FAQs
Are these legal for Ferrari Challenge or vintage racing? Yes. The D2-015 rings meet specifications for Challenge-class track events and historic Ferrari race series when used with Girodisc hats.
Can they be used with OEM Modena calipers? Yes. When installed with Girodisc two-piece hats, these rings maintain correct offset and clearance with factory Modena and Challenge calipers.
How do they perform compared to stock 360 Challenge rotors? Girodisc rings deliver superior cooling, lighter weight, and reduced heat soak, ideal for endurance and sprint racing formats.
What’s the recommended break-in process? Perform 8–10 medium stops from 60 mph to 10 mph with cool-downs between each stop to evenly transfer pad material and prevent hotspots.
Upgrade your Ferrari 360 Challenge with Girodisc D2-015 330mm rear replacement rings — precision-built for durability, balance, and unmatched braking control on the race circuit.
GiroDisc Racing Brakes & Technologies
D2-021 Girodisc Ferrari 246 / 308 Rear Replacement Rings
$789.00
Girodisc Ferrari 246, 308 Rear Rings
Maintain the legendary braking balance of your classic Ferrari with Girodisc D2-021 310mm rear replacement rings. These precision-engineered rings are designed as direct-fit replacements for Girodisc two-piece rotors, bolting to your existing Girodisc aluminum hats with the included floating hardware kit. Each ring is machined from high-carbon cast iron for consistent friction, smooth pedal feel, and improved thermal stability—ideal for spirited road driving or vintage track events.
Vehicle Fitment
Compatible with:• Ferrari 246 GT / GTS (Dino)• Ferrari 308 GTB / GTS (all variants)• Ferrari 308 GT4 (Dino)Note: Designed for Girodisc 310mm two-piece rear rotor systems only. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 310mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes enhance airflow and cooling• Maintains factory brake bias and pedal modulation• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 310mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair
Girodisc D2-021 Ferrari 246 / 308 Rear Replacement Ring FAQs
Can these be used with original Ferrari calipers? Yes. The D2-021 rings are fully compatible with OEM Ferrari calipers when used with Girodisc hats.
Do they improve braking compared to factory rotors? Yes. The Girodisc system reduces unsprung weight, improves cooling, and delivers more consistent pedal feel during aggressive driving.
Are these suitable for classic concours or restoration use? Absolutely. They retain the factory dimensions and appearance while offering modern performance and serviceability.
How often should I replace these rings? Service intervals vary with use—typically every 20,000–30,000 street miles or after visible wear and heat cycling on track.
Preserve your Ferrari’s performance heritage with Girodisc D2-021 310mm rear replacement rings—engineered for balance, cooling, and durability in both classic road and track conditions.
GiroDisc Racing Brakes & Technologies
D2-022 Girodisc Mercedes 330mm Rear Replacement Rings
$1,118.00
Girodisc Mercedes 330mm Rear Rings
Refresh the stopping performance of your Mercedes AMG with Girodisc D2-022 330mm rear replacement rings. These precision-engineered rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the worn rotor surface to maintain lightweight performance, reduce service costs, and preserve your AMG’s braking balance on road or track.
Vehicle Fitment
Compatible with:• Mercedes-Benz C63 AMG (W204 / W205 chassis)• Mercedes-Benz E63 AMG (W212 / W213 chassis)• Mercedes-Benz CLA45 AMG (W117 chassis, steel rotor applications)Note: Designed for Girodisc 330mm two-piece rear rotor systems only. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 330mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron for durability• Directional curved vanes provide superior airflow and heat management• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 330mm• 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: $780.00
Girodisc D2-022 Mercedes Rear Ring FAQs
Do these fit factory Mercedes rotor hats? No. The D2-022 rings are designed exclusively for Girodisc aluminum hats and will not fit OEM one-piece rotors.
Can I use these with AMG Performance Pack calipers? Yes. They’re fully compatible with all OEM AMG calipers using the steel rotor configuration.
Are these suitable for daily driving? Absolutely. Girodisc rotors deliver quiet operation on the street while providing race-ready performance under load.
When should I replace my Girodisc rings? Replace them when the rotor surface reaches minimum thickness or shows heat checking from repeated heavy braking.
Upgrade your Mercedes AMG braking system with Girodisc D2-022 330mm rear replacement rings — engineered for precision, cooling, and fade-free braking on both street and circuit.
GiroDisc Racing Brakes & Technologies
D2-022DS Girodisc Mercedes 330mm Rear Replacement Rings (Dimpled & Slotted)
$1,262.00
Girodisc Mercedes 330mm Rear Rings (Dimpled & Slotted)
Upgrade your Mercedes AMG’s braking system with Girodisc D2-022DS 330mm dimpled and slotted rear replacement rings. These precision-engineered rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. The dimpled and slotted design improves pad bite, aids gas evacuation, and keeps the braking surface clean for consistent performance during aggressive driving.
Vehicle Fitment
Compatible with:• Mercedes-Benz C63 AMG (W204 / W205 chassis)• Mercedes-Benz E63 AMG (W212 / W213 chassis)• Mercedes-Benz CLA45 AMG (W117 chassis, steel rotor applications)Note: Designed for Girodisc 330mm two-piece rear rotor systems. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair and includes full floating hardware kit• Direct replacements for Girodisc 330mm two-piece rear rotors• Dimpled and slotted design increases pad bite and reduces glazing• CNC-machined from high-carbon cast iron for strength and heat control• Directional curved vanes provide superior cooling efficiency• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 330mm• Position: Rear• Material: High-carbon cast iron• Surface: Dimpled and slotted• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair
Girodisc Mercedes Rear Replacement Ring FAQs
Do these fit factory Mercedes rotor hats? No. The D2-022DS rings are designed exclusively for Girodisc aluminum hats and will not fit OEM one-piece rotors.
Are they compatible with factory AMG calipers? Yes. They’re fully compatible with OEM AMG calipers and maintain the stock pad sweep area.
What’s the advantage of dimpled and slotted rotors? The design enhances initial pad bite, clears brake dust and gases, and improves pedal consistency under repeated heavy braking.
Are these suitable for track use? Yes. The dimpled and slotted pattern helps dissipate heat efficiently, making them ideal for both spirited street driving and occasional track use.
Enhance your AMG’s stopping performance with Girodisc D2-022DS 330mm rear replacement rings — engineered for precision, cooling, and lasting performance on the street or circuit.
GiroDisc Racing Brakes & Technologies
D2-023 Girodisc McLaren 350mm Rear Replacement Rings
$860.00
Girodisc McLaren 350mm Rear Rings
Restore the legendary braking performance of your McLaren with Girodisc D2-023 350mm rear replacement rings. These precision-engineered rings are designed to bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit, allowing you to refresh the wear surface without replacing the entire assembly. Crafted from Girodisc’s proprietary high-carbon cast iron, they deliver consistent pedal feel, superior heat management, and reduced fade on road or track.
Vehicle Fitment
Compatible with:• McLaren 540C (rear)• McLaren 570S / 570GT / 570S Spider (rear)• McLaren 600LT (rear)Note: For vehicles equipped with Girodisc 350mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors.
Features
• Sold as a left/right pair and includes complete floating hardware kit• Direct replacements for Girodisc 350mm two-piece rear rotors• CNC-machined from high-carbon cast iron for thermal stability• Directional curved vanes optimize cooling and reduce fade• Maintains OEM brake bias and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 350mm• 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 D2-023 McLaren Rear Replacement Ring FAQs
Can these be used with McLaren’s factory carbon-ceramic brakes? No. These are for steel Girodisc two-piece systems only and will not fit OEM carbon-ceramic setups.
Will they work with factory McLaren calipers? Yes. They are designed to fit perfectly with the OEM caliper spacing and pad profile when used with Girodisc hats.
Are these suitable for track driving? Absolutely. The high-carbon alloy and floating design deliver exceptional heat management and reduced fade in high-load conditions.
What’s the advantage of replacing just the rings? It saves cost and allows you to retain your lightweight Girodisc hats, reducing unsprung mass and maintaining factory balance.
Upgrade your McLaren’s braking system with Girodisc D2-023 350mm rear replacement rings — precision-built for durability, cooling, and fade-free performance on the street or circuit.
GiroDisc Racing Brakes & Technologies
D2-031 Girodisc Porsche 986 / 987 Rear Replacement Rings
$1,118.00
Girodisc Porsche 986, 987 Rear Rings
Refresh the braking performance of your Porsche Cayman or Boxster with Girodisc D2-031 299mm rear replacement rings. These precision-engineered rings are designed to bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the worn rotor surface while maintaining the lightweight performance of your Girodisc two-piece system.
Vehicle Fitment
Compatible with:• Porsche 986 Boxster / Boxster S (1997–2004, rear)• Porsche 987 Boxster / Boxster S (2005–2012, rear)• Porsche 987 Cayman / Cayman S (2006–2012, rear)Note: For use with Girodisc 299mm two-piece rear rotor systems only. Not compatible with OEM or PCCB carbon-ceramic rotors.
Features
• Sold as a left/right pair and includes complete floating hardware kit• Direct replacements for Girodisc 299mm two-piece rear rotors• High-carbon cast iron construction improves heat capacity and stability• Directional curved vanes enhance airflow and reduce fade• Maintains factory brake balance and ABS functionality• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 299mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair
Girodisc D2-031 Porsche 986 / 987 Rear Replacement Ring FAQs
Do these fit factory Porsche rotor hats? No. The D2-031 rings are designed only for Girodisc aluminum hats and will not fit factory one-piece or PCCB systems.
Can I reuse my Girodisc hardware? No. Each kit includes brand new hardware that must be used during installation for proper torque and float tolerance.
Are these compatible with the factory calipers? Yes. The D2-031 rings are engineered to maintain the stock caliper offset and fitment with OEM or aftermarket pads.
Are they suitable for autocross or light track use? Absolutely. These rings provide excellent heat control and consistent braking performance under spirited driving conditions.
Restore confidence and control in your Porsche Cayman or Boxster with Girodisc D2-031 299mm rear replacement rings — precision-built for cooling, strength, and long-lasting braking performance on the street or track.
GiroDisc Racing Brakes & Technologies
D2-032 Girodisc Porsche 350mm Rear Replacement Rings
$1,262.00
Girodisc Porsche 350mm Rear Rings
Restore precise braking feel in your Porsche with Girodisc D2-032 350mm rear replacement rings. These precision-machined rings bolt directly to existing Girodisc aluminum hats using the included floating hardware kit. Replace only the wear surface and maintain the lightweight, high-performance benefits of your Girodisc two-piece system — perfect for both road and track driving.
Vehicle Fitment
Compatible with:• Porsche 997 Carrera S (rear)• Porsche 997 Carrera 4S (rear)• Porsche 997 GTS (rear)• Porsche 997 Targa 4S (rear)Note: For Girodisc 350mm two-piece rear rotor systems only. Not compatible with OEM or PCCB carbon-ceramic rotors.
Features
• Sold as a left/right pair with new floating hardware kit• Direct replacements for Girodisc 350mm two-piece rear rotors• High-carbon cast iron delivers excellent heat dissipation and strength• Curved directional vanes maximize cooling and prevent fade• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 350mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and complete hardware kit• Sold/priced per pair• MSRP: $880.00
Girodisc D2-032 Porsche 997 Rear Replacement Ring FAQs
Do these fit the factory Porsche two-piece rotors? No. These are designed only for Girodisc aluminum hats and are not compatible with OEM rotor assemblies.
Can I use these with the factory calipers? Yes. These rings are designed to work seamlessly with the stock Porsche calipers when paired with Girodisc hats.
Are they suitable for heavy track use? Absolutely. Girodisc’s floating design and high-carbon alloy handle repeated high-temperature braking without warping or cracking.
When should I replace my Girodisc rings? Replace them when the rotors reach minimum thickness or show visible surface heat checking from repeated track cycles.
Upgrade your Porsche’s braking performance with Girodisc D2-032 350mm rear replacement rings — precision-engineered for balance, cooling, and endurance under the toughest driving conditions.
GiroDisc Racing Brakes & Technologies
D2-033 Girodisc Rear Replacement Rotor Rings (325mm)
$1,004.00
FITS: PORSCHE 911 C2/C4 / 996 / 997.1 (1999-2008)
REPLACEMENT ROTOR DISC 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 Giro Disc 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 grade12 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 Racing Brakes & Technologies
D2-034 Girodisc Lamborghini Gallardo (2004–2008) Rear Replacement Rings
$1,118.00
Girodisc Lamborghini Gallardo (2004–2008) 335mm Rear Replacement Rings
Renew the stopping power of your Lamborghini Gallardo with Girodisc D2-034 335mm rear replacement rings. These precision-engineered components are designed as direct replacements for Girodisc two-piece rotors, bolting to your existing Girodisc aluminum hats with the included floating hardware kit. Replace only the wear surface to maintain your lightweight, high-performance braking setup and reduce long-term service costs.
Vehicle Fitment
Compatible with:• Lamborghini Gallardo (2004–2008, rear)• Lamborghini Gallardo SE (2006, rear)• Lamborghini Gallardo Nera / Spyder (rear)Note: Designed exclusively for Girodisc 335mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic brake systems.
Features
• Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 335mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Curved directional vanes maximize airflow and cooling efficiency• Maintains OEM brake balance and ABS performance• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 335mm• 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 D2-034 Lamborghini Gallardo Rear Replacement Ring FAQs
Can these be used with factory Gallardo rotors or hats? No. The D2-034 rings are designed specifically for Girodisc aluminum hats and will not fit OEM one-piece or carbon-ceramic assemblies.
Are these compatible with both coupe and Spyder models? Yes. They fit all 2004–2008 Gallardo variants equipped with Girodisc 335mm two-piece rear rotor systems.
Do these improve braking performance over stock rotors? Yes. Girodisc’s two-piece floating design improves cooling, reduces weight, and enhances pedal feel during extended spirited driving or track use.
How often should I replace the rings? Replace the rings when rotor thickness reaches minimum specification or when surface cracking from heat cycling becomes visible.
Upgrade your Lamborghini Gallardo’s braking system with Girodisc D2-034 335mm rear replacement rings — engineered for precision, cooling, and durability worthy of a true Italian supercar.
GiroDisc Racing Brakes & Technologies
D2-035 Girodisc Porsche 981, 718 Rear Replacement Rings
$1,118.00
Girodisc Porsche 981, 718 Rear Rings
Refresh your Porsche’s braking performance with Girodisc D2-035 350mm rear replacement rings. These precision-machined, high-carbon cast iron rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the wear surface to restore full braking performance while retaining your lightweight Girodisc two-piece system.
Vehicle Fitment
Compatible with:• Porsche 981 Cayman / Boxster (rear)• Porsche 718 Cayman / Boxster (rear)Note: For Girodisc 350mm two-piece rear rotor systems only. Designed to mate with original Girodisc aluminum hats — not compatible with factory two-piece rotor hats or PCCB systems.
Features
• Sold as a left/right pair with new floating hardware kit• CNC-machined from high-carbon cast iron for heat capacity and strength• Curved directional vanes maximize cooling and reduce fade• Bolt-on fitment to Girodisc aluminum hats — no modifications required• Balanced and heat-treated for consistent braking feel• Manufactured in Bellingham, WA, USA
Specifications
• Diameter: 350mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair• MSRP: $780.00
Girodisc D2-035 Porsche 981 / 718 Rear Replacement Ring FAQs
Can these be installed with the OEM Porsche hats? No. These are designed exclusively for Girodisc aluminum hats and are not compatible with factory two-piece rotor assemblies.
Will these fit PCCB or steel brake systems? Only the Girodisc steel two-piece rotor system — they are not designed for Porsche Ceramic Composite Brakes (PCCB).
Are they suitable for track use? Yes. The high-carbon alloy and floating design resist cracking and warping under repeated high-temperature braking on track.
How do I know when to replace the rings? Replace them when the rotor surface reaches minimum thickness or shows visible heat checking, per Girodisc wear specifications.
Restore confidence in your Porsche 981 or 718 Cayman and Boxster with Girodisc D2-035 350mm rear replacement rings — the perfect blend of precision, performance, and cost-effective service life.
GiroDisc Racing Brakes & Technologies
D2-043 Girodisc Rear Replacement Rotor Rings
$1,075.00
Girodisc Ford GT (2005–2006) Rear Replacement Rings
Maintain the legendary braking performance of your Ford GT with Girodisc D2-043 rear replacement rings. These 330mm high-performance rings are designed to bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit, allowing you to refresh the rotor surface without replacing the entire assembly. Each ring is machined from Girodisc’s proprietary high-carbon alloy for exceptional strength, cooling, and thermal stability during spirited or track driving.
Vehicle Fitment
Compatible with:• Ford GT (2005–2006, rear)Note: For vehicles equipped with Girodisc 330mm 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 330mm two-piece rear rotors• CNC-machined from high-carbon cast iron for superior heat capacity• Directional curved vanes improve airflow and cooling under load• Maintains OEM brake bias and ABS calibration• 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 full hardware kit• Sold/priced per pair
Girodisc Ford GT Rear Replacement Ring FAQs
Can these be installed with factory Ford GT calipers? Yes. The D2-043 rings work perfectly with the stock Brembo calipers when used with Girodisc two-piece rotor hats.
How do these compare to OEM rotors? Girodisc rings offer lighter weight, better cooling, and superior heat cycling performance compared to the factory one-piece rotors.
Are these suitable for extended track sessions? Absolutely. The floating mount and high-carbon alloy design resist cracking and warping during heavy track use.
Do these include hardware? Yes. Each kit includes a full set of new drive pins, bolts, and washers that must be used during installation.
Refresh your supercar’s braking performance with Girodisc D2-043 330mm rear replacement rings — precision-engineered for the Ford GT’s balance of power, control, and endurance on both street and track.
GiroDisc Racing Brakes & Technologies
D2-044 Girodisc Mercedes A45, CLA45, GLA45 Rear Replacement Rings
$975.00
Girodisc Mercedes A45, CLA45, GLA45 Rear Replacement Rings
Maintain top-tier braking performance in your AMG with Girodisc rear replacement rings for the Mercedes A45, CLA45, and GLA45. These precision-engineered high-carbon iron rings are direct replacements for your existing Girodisc two-piece rotor assemblies, restoring factory fit and race-level stopping confidence.
Vehicle Fitment
Compatible with:• Mercedes-AMG A45 (All Years)• Mercedes-AMG CLA45 (All Years)• Mercedes-AMG GLA45 (All Years)Note: These are replacement friction rings only, designed to bolt directly to existing Girodisc aluminum hats using the included hardware kit.
Performance-Driven Design
Each Girodisc ring is crafted from proprietary high-carbon cast iron for exceptional durability, heat control, and resistance to cracking under heavy braking. The directional curved vane design acts as an internal pump to pull air through the disc, reducing brake fade and maintaining consistent pedal feel. Machined and finished entirely in the USA, Girodisc replacement rings ensure long service life and repeatable braking performance for high-output AMG models.
Features
• Direct replacement for Girodisc rear rotor assemblies on AMG A45, CLA45, and GLA45• Proprietary high-carbon cast iron delivers superior heat dissipation• Directional vane design maximizes airflow and cooling• Includes complete hardware kit for installation• Designed for use with Girodisc aluminum hats only• Made in the USA• Sold/priced per pair
Specifications
• Application: Rear axle• Vehicles: Mercedes-AMG A45, CLA45, GLA45• Material: High-carbon cast iron• Includes new hardware• Made in the USA• Sold/priced per pair
Girodisc D2-044 Replacement Ring FAQs
Are these compatible with OEM Mercedes brake hats? No. These rings are designed exclusively for Girodisc aluminum hats and will not fit OEM assemblies.
Do these include new hardware? Yes. Every set includes new drive pins, bolts, and washers for proper installation and long-term reliability.
Can these be used with performance brake pads? Absolutely. Girodisc rings perform best when paired with high-performance street or track compounds such as Pagid, Ferodo, or Endless.
How do these improve braking over stock rotors? The two-piece design reduces unsprung mass and improves heat transfer, giving you better pedal modulation and quicker cooling after repeated hard stops.
Equip your AMG A45, CLA45, or GLA45 with Girodisc D2-044 replacement rings for consistent, fade-free braking under the most demanding street or track conditions.
GiroDisc Racing Brakes & Technologies
D2-047 Girodisc Mitsubishi Evo X Rear Replacement Rings
$903.00
Girodisc Mitsubishi Evo X Rear Rings
Restore precision braking on your Mitsubishi Evo X with Girodisc D2-047 330mm rear replacement rings. Designed as direct-fit replacements for Girodisc two-piece rotors, these rings bolt to your existing aluminum hats using the included floating hardware kit. Refresh the wear surface without replacing the entire assembly, keeping your Evo’s braking system light, responsive, and track-ready.
Vehicle Fitment
Compatible with:• Mitsubishi Lancer Evolution X (2008–2015, rear)Note: For vehicles equipped with Girodisc 330 mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors.
Girodisc D2-047 Features
• Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 330 mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron for heat stability• Directional curved vanes enhance airflow and reduce fade• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 330 mm• 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 D2-047 Evo X Rear Replacement Ring FAQs
Do these fit the stock Evo X rotors? No. These are engineered for Girodisc two-piece rotor hats and won’t fit factory one-piece rotors.
Are these compatible with OEM Brembo calipers? Yes. They are a direct fit with the factory Brembo calipers when used with Girodisc hats.
Can I use aggressive track pads with these rings? Absolutely. The high-carbon alloy resists cracking and heat distortion under demanding race or time-attack conditions.
How much weight do these save over OEM rotors? The two-piece Girodisc system typically saves 4–6 lbs per corner, reducing unsprung mass and improving suspension response.
Upgrade your Mitsubishi Evo X with Girodisc D2-047 330 mm rear replacement rings — precision-built for fade-free performance, lighter weight, and superior thermal control on both street and circuit.
GiroDisc Racing Brakes & Technologies
D2-049 Girodisc Rear Replacement Rotor Rings (350mm)
$1,147.00
FITS: PORSCHE CAYMAN S / BOXSTER S (2005-2014+) WITH PCCB
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 Giro Disc 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 grade12 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 Racing Brakes & Technologies
D2-050 Girodisc Rear Replacement Rotor Rings
$1,204.00
Girodisc Audi R8, Lamborghini Rear Rings
Restore the braking precision of your Audi R8 or Lamborghini Gallardo with Girodisc D2-050 rear replacement rings. These 356mm rings are direct-fit replacements for Girodisc two-piece rotors, designed to bolt to your existing aluminum hats using the included floating hardware kit. Replace only the wear surface and maintain your Girodisc hats for a cost-effective, high-performance solution that delivers consistent stopping power on street and track.
Vehicle Fitment
Compatible with:• Audi R8 (V8 and V10, rear, steel rotor applications)• Lamborghini Gallardo (rear, steel rotor applications)Note: For vehicles equipped with Girodisc 356mm 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 356mm two-piece rear rotors• CNC-machined from high-carbon cast iron for superior heat control• Curved directional vanes improve airflow and cooling efficiency• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 356mm• 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 D2-050 Rear Replacement Ring FAQs
Will these fit the factory Audi R8 or Gallardo rotors? No. These rings are specifically designed for Girodisc two-piece rotor hats and will not fit OEM or carbon-ceramic systems.
Do these perform well under track conditions? Yes. The high-carbon alloy and floating design ensure consistent friction, improved cooling, and reduced fade during extended track sessions.
Can I mix these with OEM front rotors? It’s not recommended — optimal performance is achieved when running Girodisc rotors at all four corners for balanced heat management and pedal feel.
How long do these typically last? Longevity depends on use — typically 20,000+ street miles or several track weekends with proper bedding and pad choice.
Upgrade your Audi R8 or Lamborghini Gallardo with Girodisc D2-050 356mm rear replacement rings — engineered for superior heat control, balanced braking, and precision performance worthy of your supercar.
GiroDisc Racing Brakes & Technologies
D2-067 Girodisc Ford S550 Mustang Rear Replacement Rings
$760.00
Girodisc Ford S550 Mustang Rear Rings
Refresh your Ford Mustang’s braking system with Girodisc D2-067 rear replacement rings. Designed for the 330mm Girodisc two-piece rotor system, these rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the wear surface for a cost-effective solution that maintains peak braking performance and reduces unsprung weight.
Vehicle Fitment
Compatible with:• Ford Mustang GT (S550, 2015–2023, rear)• Ford Mustang Bullitt (2019–2020, rear)• Ford Mustang Shelby GT350 / GT350R (rear)Note: For vehicles equipped with Girodisc 330mm two-piece rear rotor systems. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with full hardware kit• Direct replacements for Girodisc 330mm two-piece rear rotors• CNC-machined from high-carbon cast iron for strength and thermal control• Directional curved vanes improve airflow and reduce fade• Maintains OEM brake balance and ABS calibration• 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 new hardware kit• Sold/priced per pair• MSRP: $530.00
Girodisc D2-067 Mustang Rear Replacement Ring FAQs
Do these fit the factory Mustang brake setup? No. These are designed exclusively for Girodisc two-piece rotor systems and will not fit factory one-piece rotors.
Are these compatible with performance brake pads? Yes. They work with all major pad brands including Hawk, Ferodo, and G-LOC for both street and track use.
Can I install these with basic hand tools? Yes. If you already have Girodisc two-piece rotors, installation is straightforward with standard tools and a torque wrench.
How do these perform compared to OEM rotors? The Girodisc system offers improved cooling, lighter weight, and consistent pedal feel during repeated heavy braking.
Upgrade your Mustang’s braking performance with Girodisc D2-067 330mm rear replacement rings — engineered for superior heat control, strength, and confidence on both road and track.
