Racing Brake Rotors

Girodisc Rear Replacement Rings for Porsche 981 / 718 Refresh your braking system with Girodisc D2-035 rear replacement rotor rings. These rings include hardware and bolt directly to existing Girodisc hats to restore peak stopping power without the cost of full rotor replacement. D2-035 Vehicle fitment • Porsche 981 / 718 Cayman & Boxster (rear axle) compatible with Girodisc 2-piece systems.• Designed to mate with original Girodisc rear hats only — not compatible with factory two-piece rotor hats. Note: Always verify hat ID, bolt pattern, and rotor outer diameter compatibility before installation. Engineered for longevity & cost-effectiveness The D2-035 rings are precision-machined from high-carbon cast iron. They reuse your existing Girodisc aluminum hats and updated hardware, allowing you to extend the life of your braking system at a lower cost. D2-035 Features • Sold as a pair with all replacement mounting hardware• High-carbon cast iron rotor rings• Bolt-on fitment to Girodisc hats (no machining required)• Balanced and heat-treated for reliable performance• Compatible with floating rotor design using drive pins, spring clips and washers• Proprietary Girodisc design, manufactured in Bellingham, WA• Recommended “as new” rebuild when rings are worn or at minimum thickness Related Products Girodisc D1-035 Front Replacement Rings Girodisc A2-035 Rear Rotors Girodisc A1-035 Front Rotors Service guidance • Replace rings when depth or wear reaches minimum spec or upon fatigue cracking.• Retain Girodisc hats and reuse them with these new D2-035 rings when performing service. Restore precision braking for your Porsche 981 / 718 at a fraction of the cost: the Girodisc D2-035 rings let you keep your lightweight hat assemblies while delivering renewed performance, fade resistance, and reliability.

FITMENT (REAR): Ford GT 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. REPLACEMENT ROTOR RINGS ONLY. Need new rings for your Girodisc (or Brembo or Stoptech) two-piece rotors? We've got them. Replacement rings come complete with new hardware and full instructions for re-assembly. Or, if you like, you can send us the hats and we will do all the re-assembly for only the cost of shipping.  This service is available for the life of your rotors.Price is for a pair of rings and two hardware kits.

D2-044 Girodisc Mercedes A45, CLA45, GLA45 Rear Replacement Rings D2-044 are rear rings only, sold in pairs with replacement hardware. Reuse your existing Girodisc aluminum hats. Rings are designed exclusively for Girodisc hats and are not compatible with OE or factory 2-piece hats from other brands. Vehicle Fitment Mercedes-AMG A45 (W176) – Rear (for A2-044 kits) Mercedes-AMG CLA45 (C117) – Rear (for A2-044 kits) Mercedes-AMG GLA45 (X156) – Rear (for A2-044 kits) Track-Ready Materials High-carbon iron with curved vanes supports consistent temperatures across the pad face. New hardware restores the floating interface to reduce coning and hotspotting. Features Replacement rings only; includes hardware Direct fit for Girodisc A2-044 rear rotor kits High-carbon iron, USA-poured and machined Curved vane internal design for cooling airflow D2-044 FAQs Parking brake compatibility? Fully compatible — the hat offset and ring dimensions maintain OE parking brake function. Street noise? The spring-preloaded floating hardware minimizes chatter during normal use. Mix with OE front rotors? Yes, but best results come from matching front and rear Girodisc assemblies. What’s included? Two rings plus new drive pins, springs, and fasteners. Related Products A1-310 Girodisc Mercedes A45, CLA45, GLA45 Front Rotors A2-044 Girodisc Mercedes A45, CLA45, GLA45 Rear Rotors D1-310 Girodisc Mercedes A45, CLA45, GLA45 Front Replacement Rings

FITS: MITSUBISHI EVO X 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 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.

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.

D2-050 Girodisc Replacement Rear Rotor Ring Kit REPLACEMENT ROTOR RINGS ONLY. INCLUDES 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.

FITMENT (REAR): Ford Shelby GT500 (2007-12) Ford Mustang BOSS 302(S) Ford Mustang GT (2011-14 w/ Brembo calipers) 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. REPLACEMENT ROTOR RINGS ONLY. Need new rings for your Girodisc two-piece rotors? We've got them. Replacement rings come complete with new hardware and full instructions for re-assembly. Or, if you like, you can send us the hats and we will do all the re-assembly for only the cost of shipping.  This service is available for the life of your rotors.Price is for a pair of rings and two hardware 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.

FITS: FERRARI 430 CHALLENGE 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.

D2-102 Girodisc Rear Replacement Rotor Rings (Discontinued Rotor Design) Discontinued Rotor Design, Final Sale, No Returns or Excahanges FITS: FERRARI 430 CHALLENGE 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.

FITS: FERRARI 430 SCUDERIA 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.

D1-111 Girodisc Rear Replacement Rotor Rings FITS: FERRARI 458 ITALIA and 488 GTB 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 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 their own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from heavy braking 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.

D2-119 Girodisc Replacement Rear Rotor Rings REPLACEMENT ROTOR RINGS 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.

D2-123 Girodisc Mercedes 360mm Rear Replacement Rings These Girodisc D2-123 rear replacement rings are sold in pairs with hardware and are engineered to bolt to existing Girodisc aluminum hats (rings only). Not compatible with OEM or third‑party hats. Vehicle Fitment Mercedes-Benz C63 AMG Black Series (W204) 2012 – Rear (for Girodisc 360 mm kits) Design & Performance High-carbon iron rings with 48 curved internal vanes draw cooling air through the rotor. Floating two-piece construction reduces unsprung weight while reusable aluminum hats allow ring-only replacement. Features Replacement rings only; reuse your Girodisc rear hats Supplied with replacement floating hardware High-carbon iron, slotted; directional internal vanes Built for repeated heat cycles in street/track use For Girodisc 360 mm rear kits on the listed model D2-123 Girodisc Mercedes 360mm Rear Replacement Rings FAQs: Are these specific to the Black Series? Yes—this ring kit is confirmed for the 2012 C63 AMG Black Series with Girodisc 360 mm rear hats.Do they change brake balance? No. Rings maintain OEM geometry when paired with the matching Girodisc hat.What’s included? Left and right slotted rings, new drive pins/spring hardware, and instructions.When should rings be replaced? When at or below minimum thickness, or if thermal cracks propagate to an edge. Related Products A1-308 Girodisc Mercedes 360mm Front Rotors A2-148 Girodisc Mercedes 360mm Rear Rotors D1-308 Girodisc Mercedes 360mm Front Replacement Rings D2-123 Girodisc Mercedes 360mm Rear Replacement Rings

D2-123DS Girodisc Mercedes 360mm Rear Replacement Rings (Dimpled & Slotted) These Girodisc D2-123DS rear replacement rings are sold in pairs and include replacement hardware. They are engineered to work exclusively with existing Girodisc aluminum hats and are not compatible with OEM or other aftermarket hats. Vehicle Fitment Mercedes models matched with 360 mm rear rotor systems For Girodisc rear kits using 360 mm rotors Cost-Effective Service, Track-Ready Materials High-carbon iron rings with dimpled & slotted surfaces improve pad bite and gas evacuation while maintaining stability under heat. Reusing your Girodisc hats keeps long-term service costs down. Features Replacement rings only; reuse Girodisc aluminum hats Sold in pairs with replacement hardware Dimpled & slotted surface for consistent bite High-carbon iron with 48 curved vanes for cooling Direct fit for compatible Girodisc 360 mm rear kits D2-123DS Girodisc Mercedes 360mm 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 with hardware. Can I use OEM hats? No, these rings are only compatible with Girodisc hats. Are these suitable for track use? Yes, they offer strong bite and cooling for performance driving. Related Products Related Products A1-308DS Girodisc Mercedes 360mm Front Rotors (Dimpled & Slotted) A2-148DS Girodisc Mercedes 360mm Rear Rotors (Dimpled & Slotted) D1-308DS Girodisc Mercedes 360mm Front Replacement Rings (Dimpled & Slotted) D2-123DS Girodisc Mercedes 360mm Rear Replacement Rings (Dimpled & Slotted)

D2-130 Girodisc Audi 330mm Rear Replacement Rings D2-130 rear replacement rings are sold in pairs with new hardware. Reuse your Girodisc aluminum hats. These rings are designed exclusively for Girodisc hats. Vehicle Fitment Audi S4 (B8/B9) – Rear (for A2-130 kits) Audi S5 (B8/B9) – Rear (for A2-130 kits) Audi SQ5 (B8/B9) – Rear (for A2-130 kits) Cost-Effective Service High-carbon iron rings with curved vanes offer consistent braking under heat. New drive pins and Belleville washers restore proper float. Features Replacement rings only; includes hardware Direct fit for Girodisc A2-130 rear rotor kits High-carbon iron; machined in the USA Curved vane design for airflow D2-130 FAQs Can I use OE hats? No—rings are only compatible with Girodisc hats. Sold per pair? Yes, rings and hardware for both sides are included. Bedding? Rebed pads after installation for optimal performance. Related Products A1-311 Girodisc Audi B9 S4, S5, SQ5 Front Rotors D1-311 Girodisc Audi B9 S4, S5, SQ5 Front Replacement Rings A2-130 Girodisc Audi B8/B9 Rear Rotors