Brake Rotors

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 991 C2S/C4S 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 991 C2S/C4S 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.

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 rear 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 rear 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 rear 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 Rear Caliper Rebuild Kit CCRK2-388 FAQs Does one kit cover both rear 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.

PFC Porsche 991 GT3 Cup / GT4 Clubsport Front Slotted Replacement Disc – 380mm Restore your braking performance with the PFC Front Slotted Replacement Disc, engineered specifically for the Porsche 991 GT3 Cup and Porsche Cayman GT4 Clubsport with PFC front rotors. This is a set of two replacement discs (rotor rings) only, and does not include the aluminum rotor hats. Designed for uncompromising track performance, this 380mm V2/V3 slotted disc restores the exceptional stopping power, durability, and heat management of your PFC front brake rotors. Precision-Machined for Motorsport Applications Crafted from high-quality materials and manufactured to exacting motorsport standards, this replacement disc ensures consistent performance under extreme braking conditions. The V2/V3 slotted design enhances pad bite, improves heat dissipation, and reduces the risk of glazing—making it ideal for sprint racing and high-intensity track use. Key Features: Optimized Dimensions: 380mm diameter x 32mm thickness for perfect fit and performance. V2/V3 Slotted Design: Maximizes braking efficiency, heat management, and debris removal. Direct Replacement: Fits Porsche 991 GT3 Cup (Sprint) and Porsche Cayman GT4 Clubsport (FIA GT4 homologated) models with PFC front slotted two-piece floating rotors. Track-Focused Performance: Engineered for demanding racing environments. Disc Only: Brake bell not included. Compatibility: Porsche 991 GT3 Cup (Sprint) – Not for use in official Porsche Carrera Cup championships.Porsche Cayman GT4 Clubsport (FIA GT4 homologated) GT4CS Replaces Part Numbers: 380.32.0054.451 380.32.0054.461 Whether you're chasing podiums or refining your lap times, the PFC Front Slotted Replacement Disc returns the braking performance, reliability, and precision the PFC brake rotors on your Porsche 991 GT3 Cup or GT4 Clubsport demands. Order today from Competition Motorsport for expert service and fast shipping.

Performance Friction PFC 380.070.63-64 380mm Two-Piece Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors) Porsche 991 GT3 (Front) Porsche 991 GT3RS (Front) Porsche 981 GT4 (Front) PFC the manufacturer of Porsche Cup braking systems developed a 380x34mm front rotor replacement kit that is a direct replacement for the OEM Iron Brake rotors.  Performance Friction PFC V3 Discs with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. Sold/priced per pair.

Performance Friction PFC 380.075.63-64 380mm Two-Piece Rear Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors) Porsche 992 GT3 (Rear) Porsche 992 GT3RS (Rear) Porsche 718/982 GT4RS (Rear) Porsche 991 GT2RS/GT3/GT3RS (Rear) Porsche 981 GT4 (Rear) PFC the manufacturer of Porsche Cup braking systems developed a 380x30 mm rear rotor replacement kit that is a direct replacement for the OEM Steel Brake rotors.  Performance Friction PFC V3 Disks with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. PFC’s V3 discs are optimized to ensure the highest level of performance, wear and durability for your Porsche’s braking system.  These high-performance OEM replacement assemblies now feature aluminium hats in both front and rear, similar to the original. There is a saving of over one pound by trimming excess material from the unused areas around the disc in our new V3 ZeroFailures™ design, which will allow for disc changes in a matter of seconds with a flat head screwdriver. Sold/priced per pair.

Performance Friction PFC 380.30.0065.451/461 380mm Rear Floating Racing Brake Rotors Replacement Rotors only (no hats) for 380.075.63/64 which fit the Following Cars (w/ OEM Iron Rotors) Porsche 992 GT3 (Rear) Porsche 992 GT3RS (Rear) Porsche 718/982 GT4RS (Rear) Porsche 991 GT2RS/GT3/GT3RS (Rear) Porsche 981 GT4 (Rear) PFC the manufacturer of Porsche Cup braking systems developed a 380x30 mm rear rotor replacement kit that is a direct replacement for the OEM Steel Brake rotors.  Performance Friction PFC V3 Disks with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. PFC’s V3 discs are optimized to ensure the highest level of performance, wear and durability for your Porsche’s braking system.  These high-performance OEM replacement assemblies now feature aluminium hats in both front and rear, similar to the original. There is a saving of over one pound by trimming excess material from the unused areas around the disc in our new V3 ZeroFailures™ design, which will allow for disc changes in a matter of seconds with a flat head screwdriver. Sold/priced per pair.

Performance Friction PFC 380.34.0062.451/461 380mm Front Floating Racing Brake Rotor Replacements Fit The Following Cars (w/ OEM Iron Rotors) - Center hat Excluded, rotor disc only. Replacement Disc Only For PFC 380.070.63/64 Porsche 991 GT3 (Front) Porsche 991 GT3RS (Front) Porsche 981 GT4 (Front) PFC the manufacturer of Porsche Cup braking systems developed a 380x34mm front rotor replacement kit that is a direct replacement for the OEM Iron Brake rotors.  Performance Friction PFC V3 Discs with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. Sold/priced per pair.

Performance Friction PFC 390.075.63-64 390mm Two-Piece Rear Floating Racing Brake Rotors Fit The Following Cars (w/ OEM PCCB Rotors) Porsche 992 GT3 (Rear) Porsche 992 GT3RS (Rear) Porsche 718/982 GT4RS (Rear) Porsche 991 GT2RS/GT3/GT3RS (Rear) Porsche 981 GT4 (Rear) PFC the manufacturer of Porsche Cup braking systems developed a 390x32 mm rear rotor replacement kit that is a direct replacement for the OEM Steel Brake rotors.  Performance Friction PFC V3 Disks with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. PFC’s V3 discs are optimized to ensure the highest level of performance, wear and durability for your Porsche’s braking system.  These high-performance OEM replacement assemblies now feature aluminium hats in both front and rear, similar to the original. There is a saving of over one pound by trimming excess material from the unused areas around the disc in our new V3 ZeroFailures™ design, which will allow for disc changes in a matter of seconds with a flat head screwdriver. Sold/priced per pair.

Performance Friction PFC 390.32.0066.451/461 390mm Replacement Rear Floating Racing Brake Rotors Fit The Following Cars (w/ OEM PCCB Rotors)- Center hat Excluded, rotor disc only. Replacement Disc Only For PFC 390.075.63/64 Porsche 992 GT3 (Rear) Porsche 992 GT3RS (Rear) Porsche 718/982 GT4RS (Rear) Porsche 991 GT2RS/GT3/GT3RS (Rear) Porsche 981 GT4 (Rear) PFC the manufacturer of Porsche Cup braking systems developed a 390x32 mm rear rotor replacement kit that is a direct replacement for the OEM Steel Brake rotors.  Performance Friction PFC V3 Discs with Zero Failure Technology Unique Rotor and Hat interface, eliminating most hardware. The elimination of hardware reduces weight, complexity, and installation time for less down time and more seat time on the track.  Replace your rotor discs in minutes with a flat head screwdriver PFC metallurgy specified for high Thermal stability and mechanical strength for increased longevity 48 vane geometry engineered for increased airflow for increased brake cooling during the heat of the battle while on track Patented slot pattern for increased initial bit and pad surface conditioning Lightweight forged hard anodized aluminum hat for increased durability and performance The two-piece PFC V3 design allows for disc-only replacement as well, minimizing future replacement costs and delivering outstanding performance. PFC’s V3 discs are optimized to ensure the highest level of performance, wear and durability for your Porsche’s braking system.  These high-performance OEM replacement assemblies now feature aluminium hats in both front and rear, similar to the original. There is a saving of over one pound by trimming excess material from the unused areas around the disc in our new V3 ZeroFailures™ design, which will allow for disc changes in a matter of seconds with a flat head screwdriver. Sold/priced per pair.