Racing Brake Rotors

D2-322 Girodisc BMW G8X Iron Conversion Rear Replacement Rings Price: $880.00 D2-322 are rear rings only for the G8X rear iron conversion (A2-322). Sold in pairs with new hardware; reuse your existing Girodisc aluminum hats. Rings are designed exclusively for Girodisc hats. Vehicle Fitment BMW G80/G81 M3 with CCB – Rear (for A2-322 kits) BMW G82/G83 M4 with CCB – Rear (for A2-322 kits) Cost-Effective Refresh High-carbon iron rings with curved vanes provide consistent braking under repeated heat cycles. New drive pins, clips, and Belleville washers restore proper float and clamping force. Features Replacement rings only; includes hardware Direct fit for Girodisc A2-322 rear rotor kits High-carbon iron; USA-poured and machined Curved-vane internal design for airflow Sold/priced per pair D2-322 FAQs Minimum thickness? Replace at 26 mm or sooner if any crack reaches the outer edge. Can I use OE hats? No — these rings are only for Girodisc hats. Do I need to re-bed pads? Yes — re-bed after ring replacement to stabilize the friction layer. Hardware reuse? Use the supplied new hardware; do not reuse worn pins/springs. Related Products A2-322 Girodisc BMW G8X M3, M4 Rear Iron Rotor Conversion A1-322 Girodisc BMW G8X M3, M4 Front Iron Rotor Conversion D1-220 Girodisc BMW F8X/G8X 400mm Front Replacement Rings

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

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

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

FITS: BREMBO / STOPTECH 355x32mm BIG BRAKE KITS FITMENT (FRONT): Ford Mustang FR500S Brembo Big Brake Kit 355mm x 32mm Stoptech Big Brake Kit 355mm x 32mm 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.

GD355.32.62 Girodisc Replacement Rotor Rings When it's time to refresh your brake setup without ditching the whole rotor, the Girodisc GD355.32.62 Replacement Rotor Rings are your pit crew's dream come true. Designed for racers who demand every ounce of braking performance lap after lap, these rotor rings deliver the stopping power you need without the weight (or wallet) penalty of buying brand new hats every time. Quick pit stop? These rings will have you back out there setting personal bests before your tires even cool down. Top-Tier Braking Performance Without The Full Rotor Cost Features: Direct Replacement Fit: Designed to bolt directly onto your existing Girodisc rotor hats, saving you serious time and money. Advanced Material Construction: Crafted from high-carbon alloy specifically engineered for extreme track day and racing abuse. Think ultra-consistent bite, lap after lap. Lightweight Advantage: By refreshing just the friction surface, you maintain Girodisc's unsprung weight savings compared to bulky, heavy factory rotors. Heat Management: Special venting and material blend means better thermal capacity and crack resistance, even when you're braking so late it feels like physics is about to quit. Environmentally Smarter: Reusing your hats cuts down on waste, making this a smarter choice for your car *and* your conscience. Technical Specifications: Part Number: GD355.32.62 Compatibility: Fits specific Girodisc two-piece rotor setups (confirm fitment for your exact application). Material: Proprietary high-carbon alloy iron Design: Slotted surface for better pad bite and debris evacuation What's Included: (2) Rotor rings + hardware kit FAQs: GD355.32.62 Girodisc Replacement Rotor Rings Are these Girodisc rings compatible with my OEM rotor hats? No, these are designed specifically for Girodisc hats. You must already have a Girodisc two-piece system installed. How do I know if GD355.32.62 is the right part for my car? Check the original part number on your Girodisc rotors or contact us with your vehicle and brake system details—we'll help you confirm fitment. Do these rings come pre-assembled? No, they ship as rotor rings with a fresh hardware kit. You'll reuse your existing Girodisc hats during assembly. What makes Girodisc rotor rings better than other replacement options? Girodisc uses a proprietary alloy and specific engineering to handle the brutal heat cycles of racing. It's a noticeable upgrade over generic two-piece setups. Keep your track weapon braking sharp without breaking the bank. Grab your Girodisc GD355.32.62 Replacement Rotor Rings today and get back to chasing lap records with confidence. Competition Motorsport sales@competitionmotorsport.com | 844-438-7244

Girodisc Porsche 986/987/996/997.1 Front Rotors The Girodisc system is a direct replacement for the OE disc with the addition of the included caliper spacers and longer bolts. This upgrade increases the rotor diameter from 317mm to 340mm, improving braking force, cooling capacity, and pedal feel. It’s a true bolt-on upgrade that retains your factory calipers and ABS function while reducing unsprung and rotational mass for quicker suspension response and acceleration. Lightweight, High-Performance 2-Piece Rotors The central hat section is machined from U.S.-sourced 6061-T6 aircraft-grade aluminum, while the rotor rings are Girodisc’s proprietary high-carbon cast iron. Each component is made in the USA and machined in-house for precision fitment and consistency. The rotors feature a curved vane design that acts as a centrifugal pump, drawing cooling air through the disc during use for superior heat management on both street and track. Girodisc A1-031 Features Upgrades OE 317mm discs to 340mm for greater thermal capacity and stopping power Floating mount system with 10 cadmium-plated steel drive pins for controlled float and quiet operation Reduces unsprung and rotational mass for sharper handling Fully serviceable—replace just the rotor rings when worn Includes caliper spacers and longer bolts for proper fitment Designed, cast, and machined in the USA Vehicle Fitment Works with factory calipers—no permanent modifications required. Includes caliper spacers and longer bolts. Porsche 986 Boxster (1997–2004, all non-Big-Red applications) Porsche 987 Boxster / Cayman (2005–2012, non-S) Porsche 996 Carrera (1999–2004, non-Turbo / non-GT) Porsche 997.1 Carrera (2005–2008, non-S) Does not fit: 996/997 Turbo, GT3/GT2, PCCB/ceramic brake packages, or 997.2 models. Technical Specifications Diameter: 340mm (OE 317mm) Vane Design: Curved, directional Hat Material: 6061-T6 aluminum, black anodized Ring Material: High-carbon cast iron Hardware: 10 floating drive pins with Class 12.9 fasteners Sold/Price: Per pair Girodisc A1-031 FAQs Do I need different brake pads? No. These rotors retain the factory caliper and pad shape—just choose your preferred compound for street or track use. Will these make noise like race rotors? No. Girodisc’s spring washer hardware prevents the rattle commonly found in floating rotors while maintaining proper float for thermal expansion. Are the rings replaceable? Yes. The design allows you to replace only the iron rings and reuse the aluminum hats, saving long-term cost. Can I use these for track days? Absolutely. They’re engineered to handle repeated heat cycles without warping or cracking when paired with proper pads and fluid. Upgrade your Porsche braking system with precision-engineered Girodisc rotors. Order today and experience improved stopping performance and reduced weight.

PORSCHE 981 BOXSTER S/CAYMAN S FRONT CALIPER REBUILD KIT Track days can be especially hard on the piston seals and dust boots in your brake calipers. Heat, in particular, will do a number on them. (Titanium heat shields behind your pads can help with that.)  This kit is put together from the highest-quality components to rebuild a brake caliper back to like-new condition. One kit is required per caliper (we suggest doing them both as long as you're doing it).  Once you rebuild them, get the Ti heat shields as well and lengthen the interval between rebuilds.  The shields and seals are available as a kit for convenience (and a bit of savings). We only source superior quality brake components (brakes for track use are serious business); some kits don't take it as seriously.  Any questions give us a call, we're happy to help!

PORSCHE FRONT CALIPER REBUILD KIT Track days can be especially hard on the piston seals and dust boots in your brake calipers. Heat, in particular, will do a number on them. (Titanium heat shields behind your pads can help with that.)  This kit is put together from the highest-quality components to rebuild a brake caliper back to like-new condition. One kit is required per caliper (we suggest doing them both as long as you're doing it).  Once you rebuild them, get the Ti heat shields as well and lengthen the interval between rebuilds.  The shields and seals are available as a kit for convenience (and a bit of savings). We only source superior quality brake components (brakes for track use are serious business); some kits don't take it as seriously.  Any questions give us a call, we're happy to help!

PORSCHE PCCB FRONT CALIPER REBUILD KIT Track days can be especially hard on the piston seals and dust boots in your brake calipers. Heat, in particular, will do a number on them. (Titanium heat shields behind your pads can help with that.)  This kit is put together from the highest-quality components to rebuild a brake caliper back to like-new condition. One kit is required per caliper (we suggest doing them both as long as you're doing it).  Once you rebuild them, get the Ti heat shields as well and lengthen the interval between rebuilds.  The shields and seals are available as a kit for convenience (and a bit of savings). We only source superior quality brake components (brakes for track use are serious business); some kits don't take it as seriously.  Any questions give us a call, we're happy to help!

PORSCHE 981 BOXSTER S/CAYMAN S REAR CALIPER REBUILD KIT Track days can be especially hard on the piston seals and dust boots in your brake calipers. Heat, in particular, will do a number on them. (Titanium heat shields behind your pads can help with that.)  This kit is put together from the highest-quality components to rebuild a brake caliper back to like-new condition. One kit is required per caliper (we suggest doing them both as long as you're doing it).  Once you rebuild them, get the Ti heat shields as well and lengthen the interval between rebuilds.  The shields and seals are available as a kit for convenience (and a bit of savings). We only source superior quality brake components (brakes for track use are serious business); some kits don't take it as seriously.  Any questions give us a call, we're happy to help!

PORSCHE REAR CALIPER REBUILD KIT Track days can be especially hard on the piston seals and dust boots in your brake calipers. Heat, in particular, will do a number on them. (Titanium heat shields behind your pads can help with that.)  This kit is put together from the highest-quality components to rebuild a brake caliper back to like-new condition. One kit is required per caliper (we suggest doing them both as long as you're doing it).  Once you rebuild them, get the Ti heat shields as well and lengthen the interval between rebuilds.  The shields and seals are available as a kit for convenience (and a bit of savings). We only source superior quality brake components (brakes for track use are serious business); some kits don't take it as seriously.  Any questions give us a call, we're happy to help!

The problem of brake fluid boiling is simply traced to heat transferring from the rotors and pads directly into the fluid through the caliper pistons.  When brake fluid boils, it releases air that is normally part of the molecular structure of the fluid.  This air is compressible, of course, and the brake pedal goes to the floor instead of moving the caliper pistons.  Production cars tend to suffer from this on track days because they don't have the extensive cooling ducts and exotic brake materials found on racing cars.   Race-only brake calipers generally come with titanium caliper pistons for one reason: titanium has low thermal conductivity. This means it's very bad at transferring heat, which is good if you're trying to keep your brake fluid from boiling.  Here's a comparison of materials and their relative thermal conductivity ratings (lower is better): Titanium 6AL-4V = 6.7 W/mk Steel = 52 W/mk Aluminum = 130 W/mk Most fixed calipers use aluminum pistons which are, unfortunately, excellent at transferring braking heat to your brake fluid. Our solution is to place Girodisc's thin titanium shims between the brake pad and the caliper pistons. This helps prevent braking heat from transferring into the pistons and, thus, into the fluid.  For cars that are going to see hard or multiple track days, these shims are affordable protection from losing your brake pedal at the wrong time and making your track day very expensive. Water jet cut to exact size; no cutting, grinding, or swearing involved. Price is per axle (four shims)

Girodisc Titanium Brake Pad Shields FITMENTS: Porsche 991, 992, GT4 (Front) The problem of brake fluid boiling is caused by braking heat transferring from the rotors and pads directly into the fluid through the caliper pistons. When brake fluid boils, it releases air that is normally part of the molecular structure of the fluid. This air is compressible, of course, so brake pedal pressure compresses this air instead of pushing brake fluid and moving the caliper pistons. The brake pedal goes to the floor. Production street cars tend to suffer from this on track days because they don't have the extensive cooling ducts and exotic brake materials found on race cars. Race-only brake calipers generally come with titanium caliper pistons for one reason: titanium has very low thermal conductivity, which means it's bad at transferring heat. That's good if you're trying to keep your brake fluid from boiling. Here's a comparison of materials and their relative thermal conductivity ratings in Watts per meter-Kelvin (lower is better): Titanium 6AL-4V = 6.7 W/mK Steel = 52 W/mK Aluminum = 130 W/mK Most fixed calipers use aluminum pistons which are, unfortunately, excellent at transferring braking heat to your brake fluid. Our solution is to place Girodisc's thin titanium shims between each brake pad and the caliper pistons. This helps prevent braking heat from transferring into the pistons and, thus, into the fluid. For cars that are going to see hard driving or multiple track days, these shims are affordable protection against losing your brake pedal at the worst possible time, making your track day very expensive. Water-jet cut to exact size, so there's no cutting, grinding, or swearing involved. Price is per axle (four shims)

Girodisc Titanium Brake Pad Shields FITS: Porsche 991, 992, GT4 Rear The problem of brake fluid boiling is due to heat transferring from the rotors and pads directly into the fluid through the caliper pistons. When brake fluid boils, it releases air that is normally part of the molecular structure of the fluid. This air is compressible, of course, and the brake pedal goes to the floor instead of moving the caliper pistons. Production cars tend to suffer from this on track days because they don't have the extensive cooling ducts and exotic brake materials found on race cars. Race-only brake calipers generally come with titanium caliper pistons for one reason: titanium has low thermal conductivity. This means it's very bad at transferring heat, which is good if you're trying to keep your brake fluid from boiling. Here's a comparison of materials and their relative thermal conductivity ratings (lower is better):   Titanium 6AL-4V = 6.7 W/mk Steel = 52 W/mk Aluminum = 130 W/mk   Most fixed calipers use aluminum pistons which are, unfortunately, excellent at transferring braking heat to your brake fluid. Our solution is to place Girodisc's thin titanium shims between the brake pad and the caliper pistons. This helps prevent braking heat from transferring into the pistons and, thus, into the fluid.  For cars that are going to see hard or multiple track days, these shims are affordable protection from losing your brake pedal at the wrong time and making your track day very expensive. Water jet cut to exact size; no cutting, grinding, or swearing involved. Price is per axle (four shims)

Lotus Emira Rear Caliper Rebuild Kit Been to a few too many track days? If your rear calipers are feeling sticky or weak, this kit replaces the hard-worked piston seals and dust boots to get them operating like new. Fitment Lotus Emira rear caliper. If you are unsure about compatibility, compare your caliper’s piston count and dimensions to your factory service information. Refresh your rear braking performance with a precise, track-tested kit Each kit services one front caliper and includes new piston seals and high-temperature dust boots built to our spec. Pair rebuilt calipers with titanium pad shields to reduce heat transfer and extend service intervals. CCRK2-388 Features One kit services one front caliper Includes piston seals and dust boots made to our specifications Designed to withstand high brake temperatures common on track Restores caliper feel, consistency, and pad release Recommended with titanium pad shields for added heat protection What’s included Piston seals and dust boots sufficient to rebuild one Lotus Emira rear brake caliper. Fitment Lotus Emira front caliper. If you are unsure about compatibility, compare your caliper’s piston count and dimensions to your factory service information. Installation notes Clean all components thoroughly; avoid scratching piston surfaces Use appropriate brake assembly lube and fresh DOT-rated brake fluid specified by the vehicle manufacturer After assembly, bleed the system and verify a firm, consistent pedal Follow torque specs and procedures in the factory service manual Lotus Emira Front Caliper Rebuild Kit CCRK2-388 FAQs Does one kit cover both front calipers? No. One kit services one caliper. Order two kits to service both rear calipers. How do I know my caliper seals need replacement? Common signs include uneven pad wear, dragging brakes, fluid seepage, a soft pedal, or pistons that don’t retract smoothly after braking. Can I install this at home? Experienced DIYers can rebuild calipers with the right tools and a service manual. If you are unsure, consult a professional technician. Do I need new brake fluid after the rebuild? Yes. Always use fresh fluid that meets the manufacturer’s specification and fully bleed the system after service. Will titanium pad shields really help? They reduce heat transfer from pads to pistons, helping protect seals and fluid, especially during repeated high-temperature track use. Ready to restore consistent braking performance? Add the Lotus Emira Rear Caliper Rebuild Kit to your cart, and consider titanium pad shields to keep your system cooler on track.