991.2 GT3/GT3RS/GT2RS

Girodisc Porsche 991 GT3 Rear Rotors Designed for the demanding performance of the 991 GT3 and GT3 RS, these Girodisc rear rotors provide a lighter, stronger, and more heat-efficient upgrade over factory iron rotors. Built for drivers who push their cars to the limit, they offer exceptional pedal feel, cooling performance, and precision without altering OEM brake balance or ABS function. A2-146 Girodisc Porsche 991 GT3/GT3RS Rear Rotor Fitment Porsche 911 GT3 (991.1 & 991.2)Porsche 911 GT3 RS (991.1 & 991.2)Compatible with OEM iron rotor systems and factory calipers. Precision-Built for Track and Street Use The Girodisc system bolts directly to the factory hubs and calipers—no modifications or pad changes required. Each rotor features a CNC-machined 6061-T6 aluminum hat paired with Girodisc’s proprietary high-carbon cast-iron friction ring. The two-piece floating design allows for thermal expansion without warping, keeping braking consistent during intense heat cycles. Curved internal vanes act as centrifugal pumps to force cooling air through the disc, extending rotor life and minimizing fade. A2-146 Girodisc Porsche 991 GT3/GT3RS Rear Rotor Features • Direct replacement for OEM iron rear rotors—no modifications required• Billet 6061-T6 aluminum hats with anodized finish• Proprietary high-carbon cast-iron rings, cast and machined in the USA• Floating mount system with cadmium-plated drive pins and anti-noise washers• Curved internal vane design improves airflow and cooling• Maintains factory brake balance and ABS efficiency• Fully rebuildable—replace only the iron rings when worn• Sold/priced per pair A2-146 Girodisc Porsche 991 GT3/GT3RS Rear Rotor FAQs: Do these fit both the 991 GT3 and GT3 RS? Yes. They’re designed specifically for OEM iron rotor-equipped 991 GT3 and GT3 RS models and work with stock Brembo calipers. Do I need to change my brake pads or hardware? No. Unlike many aftermarket systems, Girodisc rotors retain full compatibility with OEM pads and hardware. What kind of performance gain should I expect? Expect reduced unsprung mass, better cooling efficiency, and improved pedal consistency under heavy braking conditions. Are these rotors suitable for track use? Absolutely. The floating two-piece construction and curved vane cooling make them ideal for extended track sessions or spirited driving on twisty roads. Bring race-proven braking precision to your Porsche 991 GT3 with Girodisc’s rear rotors—crafted for balance, responsiveness, and reliability at any speed.

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

AP Racing Radi-CAL R4 Racing Brake Fluid Among the Highest Dry Boilings Point On The Market Today AP Racing Radi-CAL R4 racing brake fluid has an ultra-high typical dry boiling point, at 644º F / 340º C. Radi-CAL R4 racing brake fluid has been designed to perform better than any other product at the extremes of heavy-duty braking in top levels of professional racing. AP Racing Radi-CAL R4 has outstanding resistance to vapor lock and pedal fade under the most exacting conditions. A higher vapor lock point means a firmer brake pedal at the extremes of brake temperatures. Enhanced lubricity means R4 is a better lubricant than other market-leading racing brake fluids. This helps extend the life of the metal moving parts in your brake system while increasing system efficiency. Radi-CAL R4 can be mixed with other DOT 3 and DOT 4 racing brake fluid, although for maximum performance your braking system should be thoroughly purged with R4 fluid. AP Racing Radi-Cal Pro R4 Brake Fluid Details: Manufacturer: AP Racing Manufacturer part number: AP-CP7005 DOT rating: DOT 4 Dry Boiling Point: 644º F / 340º C Wet Boiling Point: 383º F / 195º C Bottle Size: 500 ml (16.9 fl. oz.)

Ferodo 11 FCP4665 Porsche Rear Brake Pads Designed for use with iron brake rotors only. Not for carbon-ceramic rotors. Ferodo FCP4665 Porsche Rear Brake Pad Fitment: Make Model Build (Year) Front Rear Porsche 918 Spyder 15 - X Porsche 991 GT3 [iron brakes] 14 - 18 X Porsche 991 GT3 RS [iron brakes] 16 -  X Porsche 991 Turbo [iron brakes] 13 - 19 X Porsche 991 Turbo S [iron brakes] 13 - 19 X Porsche 991.2 GT3 [iron brakes] 18 - X Porsche 991.2 GT3 RS [iron brakes] 19 - X Porsche 991 911 Speedster [iron brakes] 19 - X Porsche 718 Cayman GT4 4.0 [982] [iron brakes] 19 - X Porsche Cayman GT4 [981] 16 - 20 X Porsche 992 Turbo [iron brakes] 20 - X Porsche 992 GT3 [iron brakes] 22 - X Porsche 718 Cayman GT4 4.0 RS [982] [iron brakes] 21 - X   Ferodo DS3.12 Brake Compound Details The DS3.12 is the latest evolution in Ferodo's incredible DS line. Sports cars today have more of everything: more horsepower, more sophisticated aero, higher curb weights, and stickier tires. These attributes place serious demands on a vehicle's brake system. The Ferodo DS3.12 is the modern pad compound designed from the start to explicitly handle those demands. Ferodo DS1.11 Brake Compound Details The DS1.11 has a lower mu than the DS3.12 at all temperatures and can be characterized as a moderate mu pad vs. other endurance racing compounds. They require more pedal force than the DS3.12, and they have a slightly declining torque curve as temperatures rise. As they get hotter and you dive deeper into a turn, you may feel like you need to push a little harder on the brake pedal to elicit the same response (which is a feel many drivers actually prefer). Some drivers feel that the DS1.11 is more controllable on street tires than DS3.12 since ABS cannot be activated as easily. It will last a fairly long time vs. many other pad compounds on the market but does not last quite as long as the DS3.12. They are very gentle on discs at track temperatures when a proper pad transfer layer is maintained. The DS1.11 also has an outstanding max temp and fade resistance, just not quite as high as 3.12. We're not aware of anyone who has faded them, and most people differentiate between the DS1.11 and DS3.12 based on feel. Ferodo DSUno Brake Compound Details For our customers who enjoy the performance of the DS1.11, but just want a little more bite, we recommend the DSUNO. It doesn't wear quite as long as the DS1.11, but it does offer a higher overall mu once it reaches track temperatures. Ferodo DS2500 Brake Compound Details Although we always recommend using a dedicated race pad for the track, the DS2500 is one of the best hybrid street/track pads on the market. It features the moderately high bite and solid fade resistance of a track pad, with the relatively low dust and noise levels of a street pad. When used as a street pad, it can produce some squeal on certain vehicle platforms. If you drive aggressively on the street, do some canyon runs, autocross, and maybe some light track duty on street tires, the DS2500 is tough to beat. Ferodo FCP4665 Compound Comparison Chart The cold friction profile of the Ferodo DS1.11 is predictable and grows linear as your pad heats up with very good fade resistance all the way to its maximum 1382 F limit. Another common use of the Ferodo DS1.11 is an advanced track day driver in the red group in a well set-up chassis with sticky rubber and aero. Ferodo FCP4665 Operating Temperature Comparison Chart Ferodo FCP4665 Friction Coefficient (Mu) Comparison Chart

Carbotech CT1741 Performance & Racing Brake Pads Cobalt CT1741 Fits The Following Vehicles: Make Model Build (Year) Front Rear Porsche 991 GT3 [iron brakes] 14 - 16 X Porsche 991 GT3 RS [iron brakes] 16  X Porsche 991 Turbo [iron brakes] 13 - 19 X Porsche 991 Turbo S [iron brakes] 13 - 19 X Porsche 991.2 GT3 [iron brakes] 18 - 19 X Porsche 991.2 GT3 RS [iron brakes] 19 X Porsche 991 911 Speedster [iron brakes] 19 X Porsche 992 3.0 Carrera S [iron brakes] 20 - X Porsche 992 3.0 Carrera 4S [iron brakes] 20 - X Porsche 718 Cayman GT4 4.0 [982] [cast iron brakes] 19 - X Porsche Cayman GT4 [981] 16 -20 X Porsche 718 Cayman GTS 4.0 [982] [cast iron brakes] 2016 X Porsche 992 Turbo [iron brakes] 20 - X Porsche 992 GT3 / GT3RS [iron brakes] 22 - X Porsche 718 Cayman GT4 4.0 RS [982] [cast iron brakes] 23 - X Precision braking starts here. The Carbotech CT1741 brake pads offer world-class stopping power across a range of compounds engineered for HPDE, club racing, time trials, and daily driving. Whether you're shaving tenths at a national event or building consistency during weekend track days, there's a Carbotech compound tailored to your performance goals. Manufactured in the USA using Carbotech’s proprietary ceramic and metallic formulations, these pads deliver unmatched modulation, rotor friendliness, and fade resistance. Friction materials have evolved significantly over the years. Brake pads were originally made with organic ingredients such as asbestos and carbon, held together by a strong resin. Most brake pads sold today are considered semi-metallic, semi-metallic brake pads use brass, copper, and steel wool shavings held together by a resin. Unfortunately, the main drawback about the use of steel strands, iron, graphite, and small amounts of filer and friction modifiers (used to provide strength and conduct heat away from the rotors) is that the metal shavings and iron must rub against steel rotors every time the brakes are applied. This generates more noise and is a lot more abrasive on the rotors. It also creates corrosive dust that can damage your braking system as well as the paint on your wheels and car. Friction materials that contain Ceramic Kevlar formulations have become recognized for their desirable blend of traits. This allows the Ceramic Kevlar pads to handle higher brake temperatures with less heat fade, and provide faster recovery after heavy braking. It also reduces brake dust and makes wheel maintenance easier! Ceramic Kevlar compounds extend brake life compared to most other semi-metallic and organic materials, and at the same time they outlast other premium pad materials by a significant margin, without compromising in noise control, pad life, and all around braking performance. The CT1741 shape fits a variety of high-performance applications, making it a go-to solution for drivers looking for track day brake pads that match their skill level and intensity. Carbotech CT1741 Brake Pad Highlights Multiple compounds available to match driving style and track conditions Fade-resistant ceramic-metallic formulations designed for extreme temperature stability Rotor-friendly design ensures longer disc life and reduced operating costs Made in the USA with race-proven quality and compound development Perfect for HPDE, time trials, autocross, club racing, and pro-level motorsports Available Compounds for the Carbotech CT1741 Brake pad 1521: street compound designed for spirited street driving. Low dust and quiet operation with high initial bite.  1521 friction coefficient rated at 0.47. AX6: Autocross-focused compound offering more initial bite than 1521. Great for Solo and light-duty track use where cold bite matters. AX6 friction coefficient rated at 0.50. RP2: Ideal for racers seeking durability and rotor life in endurance club racing. Very low wear rates and excellent release characteristics. RP2 friction coefficient rated at 0.50. XP8: Entry-level race compound perfect for advanced HPDE and club racing. Consistent torque and excellent modulation under high heat. XP8 friction coefficient is rated at 0.56. XP10: Mid-tier race pad with higher bite and fade resistance than XP8. Excellent for time trials, wheel-to-wheel racing, and aggressive HPDE. XP10 friction coefficient is rated at 0.60. XP12: Designed for heavier cars or high-speed tracks. High torque levels and consistent performance across wide temperature ranges. XP12 friction coefficient is rated at 0.65. XP20: Ultra-high torque and friction. For drivers who demand maximum stopping power in pro-level racing environments.  XP20 friction coefficient rated at 0.68. XP24: Highest friction compound in the Carbotech lineup. Built for pro racing applications requiring peak performance and extreme heat tolerance. XP24 friction coefficient rated at 0.70. Carbotech 1521 The Carbotech™ 1521™ is a high-performance street compound. The 1521™ compound is known for its release and modulation, along with unmatched rotor friendliness. 1521™ is also a low dust and low noise compound with an excellent initial bite. This compound's excellent linear torque production provides incredible braking force without ABS intervention. Carbotech™ 1521™ operating range starts out at ambient and goes up to 800°F (426°C+). 1521™ is suitable for ALL street cars, perfect for your tow vehicle or fleet vehicle. Carbotech™ 1521™ is NOT recommended for track use. Carbotech AX6 The AX6™ is specifically engineered for Autocross applications. A high-torque brake compound delivering reliable and consistent performance over a wide operating temperature range of 50°F to 1000°F + (10°C to 537°C+). The advanced compound matrix provides an excellent initial bite, high coefficient of friction at lower temperatures along with very progressive brake modulation and release characteristics. NOT FOR STREET USE! Carbotech RP2 The RP2™ compound was engineered for endurance racing based on our highly successful XP™ Series formulations. RP2™ has a strong initial bite, a little less modulation than our XP12™, but still maintains the rotor friendliness of our XP™ series compounds. RP2™ has great fade resistance with a temperature range of 250°F to 1450°F+ (121°C to 787°C). RP2™ is as rotor friendly as our XP™ series compounds. NOT FOR STREET USE! Carbotech XP8 A high torque brake compound with a wide operating temperature range of 200°F-1250°F+ (93°C to 676°C+). Carbotech™ XP8™ is their first racing compound. It provides good initial bite at race temperatures, high coefficient of friction, excellent modulation, and release characteristics. XP8™ offers extremely high fade resistance and is very rotor friendly. It's perfect for track day use with any tire.  NOT FOR STREET USE! Carbotech XP10 When Carbotech™ unleashed the XP10™ it immediately gathered multiple regional, divisional, and national championships. The XP10™ has a strong initial bite with a coefficient of friction and rotor friendliness unmatched in the industry. Fade resistance is in excess of 1475°F (801°C). XP10™ still maintains the highly-praised release, excellent modulation and rotor friendliness that have made all Carbotech™ compounds so successful. NOT FOR STREET USE! Carbotech XP12 Another highly successful XP™ series compound with an excellent initial bite, torque and fade resistance over and above the XP10™ compound. XP12™ has a temperature range of 250°F to 1850°F+ (121°C to 1010°C+). The XP12™ has that excellent Carbotech™ release and modulation that has made all other Carbotech™ compounds so successful. The XP12™ is more rotor aggressive than XP10™ but compared to the competition the XP12™ is still very rotor friendly. NOT FOR STREET USE! Carbotech XP20 XP20™ is the latest iteration of the highly successful XP™ series of compounds.  With an extremely aggressive initial bite, linear torque curve and excellent fade resistance the XP20™ is a major step in a progression of the XP™ series of compounds from Carbotech™. XP20™ has a temperature range of 275°F to 2000°F+ (135°C to 1093°C+). Carbotech™ XP20™ maintains our tradition of having the outstanding release and modulation that has made all other Carbotech™ compounds so successful.  NOT FOR STREET USE! Carbotech XP24 XP24™ is the pinnacle compound of the extremely successful XP™ Series of compounds engineered by Carbotech™. This compound is based on the same fundamentals that exist in all other Carbotech™ formulations. XP24™ has even more initial bite, more overall bite, and more torque along with the most linear torque curve we have ever offered. The thermal characteristics are of the highest Carbotech™ offers along with one of the highest coefficient of friction ratings offered by anyone in the braking industry. This compound is the longest wearing compound Carbotech™ offers as it was originally engineered for endurance applications at the highest pro racing levels. This revolutionary new compound has been extremely successful with an open wheel, closed wheel, sprint, and endurance applications. XP24™ has a temperature range of 400°F to 2000°F+ (204°C to 1093°C+). NOT FOR STREET USE! Carbotech CT1741 Frequently Asked Questions (FAQ) 1. Which Carbotech compound is best for daily driving? 1521 is ideal for spirited street use with minimal dust and noise.. 2. What’s the best compound for beginner HPDE drivers? XP8 is a great starting point for advanced HPDE, offering strong bite and fade resistance without being overly aggressive. 3. Can I mix Carbotech compounds front and rear? Yes, many drivers use a more aggressive compound in the front (e.g., XP12) and a slightly less aggressive one in the rear (e.g., XP10) to fine-tune balance. 4. Are Carbotech pads hard on rotors? No. All Carbotech compounds are known for being rotor-friendly, helping reduce rotor wear and operating costs. 5. Which compound is best for endurance racing? RP2 is engineered specifically for long-distance events where pad and rotor life are just as important as torque output. 6. Do Carbotech pads require special bedding procedures? Yes. A proper bedding-in process is critical for optimal performance. Carbotech provides detailed bedding instructions with every set of pads. Carbotech Brake Pad Bedding Procedures The bedding process transfers friction material from the pads into the pores of the brake rotor. It also matches the microscopic contours of the pads and rotors to increase surface contact. Proper bedding of pads & rotors will result in greater performance, longer pad life & less rotor wear. Failure to properly bed in your pads could lead to friction materials chunking and breaking up. This could also lead to overheating your pads and causing them to glaze over resulting in the car not being able to stop or slow fast enough. All new brake pads require a bedding process. The proper way to bed your brake pads and brake discs (rotors) is to bed them on the racetrack, NOT on the street. Start this process by pumping your brakes a few times to assure proper installation. Once on track perform several moderate (medium) near stops (to a very slow rolling speed) to thoroughly warm up the pads and rotors. This should take 1-2 laps. This allows a thin layer of the pad material to be transferred into the micro-grooves of the rotor. After the pads/rotors are warm, perform a series of hard near stops (to a slow rolling speed) until some brake fade is felt. This process should take about 2-4 laps (depending on the track). Once this occurs, then stay off the brakes (as much as possible) and bring your car into the pits/paddock to completely cool. Do not lock the tires during this operation. Allow brake pads and/or rotors cool down to ambient temperatures; no less than 30 minutes. The total bedding procedure should not take more than 5-6 laps or about 10-15 minutes. Failure to properly bed in your pads could cause friction material to chunk and break up resulting in poor pad performance and pad life. Improper bedding can also lead to overheating your pads and causing them to glaze over, resulting in the car not being able to stop or slow properly.

Performance Friction PFC 410.34.0063.451/461 410mm Replacement Front Floating Racing Brake Rotors Fit The Following Cars which use PFC 410.069.63/64 (w/ OEM Iron Rotors or PCCB Rotors) - Center hat Excluded, rotor disc only. Replacement Disc Only For PFC 410.069.63/64 and 410.057.63/64 Porsche 992 GT3 PCCB/Iron (Front) Porsche 992 GT3RS PCCB/Iron (Front) Porsche 991 GT2RS PCCB (Front) Porsche 991 GT3 PCCB (Front) Porsche 991 GT3RS PCCB (Front) Porsche 718 / 982 GT4RS PCCB or Iron (Front) Porsche 718 GT4 PCCB (Front) PFC the manufacturer of Porsche Cup braking systems developed a 410mm front rotor replacement kit that is a direct replacement for the OEM 991 GT or 718 GT4 PCCB Brake rotors or OEM 718 / 982 GT4RS with PCCB or Iron 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 380.30.0065.451/461 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.

Carbotech CT1740 Performance & Racing Brake Pads Cobalt CT1740 Fits The Following Vehicles: Make Model Build (Year) Front Rear Porsche 918 Spyder 15 - X Porsche 991 GT3 [iron brakes] 14 - 18 X Porsche 991 GT3 RS [iron brakes] 16 -  X Porsche 991 Turbo [iron brakes] 13 - 19 X Porsche 991 Turbo S [iron brakes] 13 - 19 X Porsche 991.2 GT3 [iron brakes] 18 - X Porsche 991.2 GT3 RS [iron brakes] 19 - X Porsche 991 911 Speedster [iron brakes] 19 - X Porsche 718 Cayman GT4 4.0 [982] [iron brakes] 19 - X Porsche Cayman GT4 [981] 16 - 20 X Porsche 992 Turbo [iron brakes] 20 - X Porsche 992 GT3 [iron brakes] 22 - X Porsche 718 Cayman GT4 4.0 RS [982] [iron brakes] 21 - X Precision braking starts here. The Carbotech CT1740 brake pads offer world-class stopping power across a range of compounds engineered for HPDE, club racing, time trials, and daily driving. Whether you're shaving tenths at a national event or building consistency during weekend track days, there's a Carbotech compound tailored to your performance goals. Manufactured in the USA using Carbotech’s proprietary ceramic and metallic formulations, these pads deliver unmatched modulation, rotor friendliness, and fade resistance. Friction materials have evolved significantly over the years. Brake pads were originally made with organic ingredients such as asbestos and carbon, held together by a strong resin. Most brake pads sold today are considered semi-metallic, semi-metallic brake pads use brass, copper, and steel wool shavings held together by a resin. Unfortunately, the main drawback about the use of steel strands, iron, graphite, and small amounts of filer and friction modifiers (used to provide strength and conduct heat away from the rotors) is that the metal shavings and iron must rub against steel rotors every time the brakes are applied. This generates more noise and is a lot more abrasive on the rotors. It also creates corrosive dust that can damage your braking system as well as the paint on your wheels and car. Friction materials that contain Ceramic Kevlar formulations have become recognized for their desirable blend of traits. This allows the Ceramic Kevlar pads to handle higher brake temperatures with less heat fade, and provide faster recovery after heavy braking. It also reduces brake dust and makes wheel maintenance easier! Ceramic Kevlar compounds extend brake life compared to most other semi-metallic and organic materials, and at the same time they outlast other premium pad materials by a significant margin, without compromising in noise control, pad life, and all around braking performance. The CT1740 shape fits a variety of high-performance applications, making it a go-to solution for drivers looking for track day brake pads that match their skill level and intensity. Carbotech CT1740 Brake Pad Highlights Multiple compounds available to match driving style and track conditions Fade-resistant ceramic-metallic formulations designed for extreme temperature stability Rotor-friendly design ensures longer disc life and reduced operating costs Made in the USA with race-proven quality and compound development Perfect for HPDE, time trials, autocross, club racing, and pro-level motorsports Available Compounds for the Carbotech CT1741 Brake pad 1521: street compound designed for spirited street driving. Low dust and quiet operation with high initial bite.  1521 friction coefficient rated at 0.47. AX6: Autocross-focused compound offering more initial bite than 1521. Great for Solo and light-duty track use where cold bite matters. AX6 friction coefficient rated at 0.50. RP2: Ideal for racers seeking durability and rotor life in endurance club racing. Very low wear rates and excellent release characteristics. RP2 friction coefficient rated at 0.50. XP8: Entry-level race compound perfect for advanced HPDE and club racing. Consistent torque and excellent modulation under high heat. XP8 friction coefficient is rated at 0.56. XP10: Mid-tier race pad with higher bite and fade resistance than XP8. Excellent for time trials, wheel-to-wheel racing, and aggressive HPDE. XP10 friction coefficient is rated at 0.60. XP12: Designed for heavier cars or high-speed tracks. High torque levels and consistent performance across wide temperature ranges. XP12 friction coefficient is rated at 0.65. XP20: Ultra-high torque and friction. For drivers who demand maximum stopping power in pro-level racing environments.  XP20 friction coefficient rated at 0.68. XP24: Highest friction compound in the Carbotech lineup. Built for pro racing applications requiring peak performance and extreme heat tolerance. XP24 friction coefficient rated at 0.70. Carbotech 1521 The Carbotech™ 1521™ is a high-performance street compound. The 1521™ compound is known for its release and modulation, along with unmatched rotor friendliness. 1521™ is also a low dust and low noise compound with an excellent initial bite. This compound's excellent linear torque production provides incredible braking force without ABS intervention. Carbotech™ 1521™ operating range starts out at ambient and goes up to 800°F (426°C+). 1521™ is suitable for ALL street cars, perfect for your tow vehicle or fleet vehicle. Carbotech™ 1521™ is NOT recommended for track use. Carbotech AX6 The AX6™ is specifically engineered for Autocross applications. A high-torque brake compound delivering reliable and consistent performance over a wide operating temperature range of 50°F to 1000°F + (10°C to 537°C+). The advanced compound matrix provides an excellent initial bite, high coefficient of friction at lower temperatures along with very progressive brake modulation and release characteristics. NOT FOR STREET USE! Carbotech RP2 The RP2™ compound was engineered for endurance racing based on our highly successful XP™ Series formulations. RP2™ has a strong initial bite, a little less modulation than our XP12™, but still maintains the rotor friendliness of our XP™ series compounds. RP2™ has great fade resistance with a temperature range of 250°F to 1450°F+ (121°C to 787°C). RP2™ is as rotor friendly as our XP™ series compounds. NOT FOR STREET USE! Carbotech XP8 A high torque brake compound with a wide operating temperature range of 200°F-1250°F+ (93°C to 676°C+). Carbotech™ XP8™ is their first racing compound. It provides good initial bite at race temperatures, high coefficient of friction, excellent modulation, and release characteristics. XP8™ offers extremely high fade resistance and is very rotor friendly. It's perfect for track day use with any tire.  NOT FOR STREET USE! Carbotech XP10 When Carbotech™ unleashed the XP10™ it immediately gathered multiple regional, divisional, and national championships. The XP10™ has a strong initial bite with a coefficient of friction and rotor friendliness unmatched in the industry. Fade resistance is in excess of 1475°F (801°C). XP10™ still maintains the highly-praised release, excellent modulation and rotor friendliness that have made all Carbotech™ compounds so successful. NOT FOR STREET USE! Carbotech XP12 Another highly successful XP™ series compound with an excellent initial bite, torque and fade resistance over and above the XP10™ compound. XP12™ has a temperature range of 250°F to 1850°F+ (121°C to 1010°C+). The XP12™ has that excellent Carbotech™ release and modulation that has made all other Carbotech™ compounds so successful. The XP12™ is more rotor aggressive than XP10™ but compared to the competition the XP12™ is still very rotor friendly. NOT FOR STREET USE! Carbotech XP20 XP20™ is the latest iteration of the highly successful XP™ series of compounds.  With an extremely aggressive initial bite, linear torque curve and excellent fade resistance the XP20™ is a major step in a progression of the XP™ series of compounds from Carbotech™. XP20™ has a temperature range of 275°F to 2000°F+ (135°C to 1093°C+). Carbotech™ XP20™ maintains our tradition of having the outstanding release and modulation that has made all other Carbotech™ compounds so successful.  NOT FOR STREET USE! Carbotech XP24 XP24™ is the pinnacle compound of the extremely successful XP™ Series of compounds engineered by Carbotech™. This compound is based on the same fundamentals that exist in all other Carbotech™ formulations. XP24™ has even more initial bite, more overall bite, and more torque along with the most linear torque curve we have ever offered. The thermal characteristics are of the highest Carbotech™ offers along with one of the highest coefficient of friction ratings offered by anyone in the braking industry. This compound is the longest wearing compound Carbotech™ offers as it was originally engineered for endurance applications at the highest pro racing levels. This revolutionary new compound has been extremely successful with an open wheel, closed wheel, sprint, and endurance applications. XP24™ has a temperature range of 400°F to 2000°F+ (204°C to 1093°C+). NOT FOR STREET USE! Carbotech CT1740 Frequently Asked Questions (FAQ) 1. Which Carbotech compound is best for daily driving? 1521 is ideal for spirited street use with minimal dust and noise.. 2. What’s the best compound for beginner HPDE drivers? XP8 is a great starting point for advanced HPDE, offering strong bite and fade resistance without being overly aggressive. 3. Can I mix Carbotech compounds front and rear? Yes, many drivers use a more aggressive compound in the front (e.g., XP12) and a slightly less aggressive one in the rear (e.g., XP10) to fine-tune balance. 4. Are Carbotech pads hard on rotors? No. All Carbotech compounds are known for being rotor-friendly, helping reduce rotor wear and operating costs. 5. Which compound is best for endurance racing? RP2 is engineered specifically for long-distance events where pad and rotor life are just as important as torque output. 6. Do Carbotech pads require special bedding procedures? Yes. A proper bedding-in process is critical for optimal performance. Carbotech provides detailed bedding instructions with every set of pads. Carbotech Brake Pad Bedding Procedures The bedding process transfers friction material from the pads into the pores of the brake rotor. It also matches the microscopic contours of the pads and rotors to increase surface contact. Proper bedding of pads & rotors will result in greater performance, longer pad life & less rotor wear. Failure to properly bed in your pads could lead to friction materials chunking and breaking up. This could also lead to overheating your pads and causing them to glaze over resulting in the car not being able to stop or slow fast enough. All new brake pads require a bedding process. The proper way to bed your brake pads and brake discs (rotors) is to bed them on the racetrack, NOT on the street. Start this process by pumping your brakes a few times to assure proper installation. Once on track perform several moderate (medium) near stops (to a very slow rolling speed) to thoroughly warm up the pads and rotors. This should take 1-2 laps. This allows a thin layer of the pad material to be transferred into the micro-grooves of the rotor. After the pads/rotors are warm, perform a series of hard near stops (to a slow rolling speed) until some brake fade is felt. This process should take about 2-4 laps (depending on the track). Once this occurs, then stay off the brakes (as much as possible) and bring your car into the pits/paddock to completely cool. Do not lock the tires during this operation. Allow brake pads and/or rotors cool down to ambient temperatures; no less than 30 minutes. The total bedding procedure should not take more than 5-6 laps or about 10-15 minutes. Failure to properly bed in your pads could cause friction material to chunk and break up resulting in poor pad performance and pad life. Improper bedding can also lead to overheating your pads and causing them to glaze over, resulting in the car not being able to stop or slow properly.

Spiegler Stainless Brake Lines - Porsche Rear 2 Line Kit Fitments include Most Porsche Models Spiegler 100% stainless front or rear brake lines for various Porsche models. ***DOES NOT REMOVE/REPLACE REAR CALIPER HARD LINE***  These line kits were revised to retain the rear hard line on these applications. On the rear calipers, the hard line bracket is bolted to the caliper and therefore does not need to be disconnected in order to remove the caliper for a brake pad change. Features All components manufactured in USA and Europe Stress-free Torsion Fitting System. Abrasion resistant coating/sheath Aircraft quality stainless steel fittings and bolts. Heavy gauge, tightly woven stainless steel braid Stringent and consistent quality control Du Pont PTFE- Teflon® lining DOT compliant Full testing battery on all parts, with lifetime warranty  Benefits Allows 360 degree rotation of banjo fitting for correct alignment and strain reduction Eliminates snagging and chafing Superior strength, longevity, and safety Eliminates line swell, more consistent feel Reduces line expansion and provides greater durability Quality assurance, road legal Allows for personalization Purchase and drive with confidence

Spiegler Stainless Brake Lines - Porsche Front and Rear 4 Line Kit Fitments include Most Porsche Spiegler 100% stainless brake lines for various Porsche models. Front 4 Line Kit that replaces the OEM caliper hard line and increases line length for easier pad changes. Allows for caliper removal without opening hydraulic connection or removing the bracket attached to the spindle. Features All components manufactured in USA and Europe Stress-free Torsion Fitting System. Abrasion resistant coating/sheath Aircraft quality stainless steel fittings and bolts. Heavy gauge, tightly woven stainless steel braid Stringent and consistent quality control Du Pont PTFE- Teflon® lining DOT compliant Wide range of colors Full testing battery on all parts, with lifetime warranty  Benefits Allows 360 degree rotation of banjo fitting for correct alignment and strain reduction Eliminates snagging and chafing Superior strength, longevity, and safety Eliminates line swell, more consistent feel Reduces line expansion and provides greater durability Quality assurance, road legal Allows for personalization Purchase and drive with confidence

AP Racing 380x34mm Replacement J Hook Rotor Rings Replacement Disc Only For AP Racing 13.01.20017 Rotor discs and installation hardware only. Center hat excluded. Fits The Following Cars (w/ OEM Iron Rotors) Porsche 991 GT3 (Front) Porsche 991 GT3RS (Front) Porsche 981 GT4 (Front) AP Racing by Essex 2-piece Competition J Hook front disc pair for 981 GT4, 991.1 & 991.2 GT3 & GT3 RS with iron discs 380mm x 34mm (14.96" x 1.34") 72 Vane, D66 Huge increase in airflow, cooling capacity, and durability vs. OEM discs Saves 2 lbs. unsprung weight per side vs. OEM iron discs Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips Sold/priced per pair of rotor rings (including hardware). AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down. AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and Preparation of AP Racing J Hook Discs Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

AP Racing 380x30mm 2-piece J Hook Rear Brake Rotors for Porsche (OEM Iron) 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) Sold/priced per pair. AP Racing 2-piece Competition J Hook rear disc pair for 991.1 & 991.2 GT3 (including GT3RS), 992 GT3, and 718 GT4 and GT4 RS with iron discs 380x30mm (14.96" x 1.18") 72 Vane, D67 radial depth Huge increase in airflow, cooling capacity, and durability vs. OEM discs Saves 3-4 lbs. unsprung weight per side Retains full parking brake functionality Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips Sold/priced per pair. AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down.   AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and preparation of AP Racing J Hook Disc Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.

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 410.069.63-64 410mm Two-Piece Front Floating Racing Brake Rotors Fit The Following Cars (w/ OEM Iron Rotors or PCCB Rotors) Porsche 991 GT2RS PCCB (Front) Porsche 991 GT3 PCCB (Front) Porsche 991 GT3RS PCCB (Front) Porsche 718 / 982 GT4RS PCCB or Iron (Front) Porsche 718 GT4 PCCB (Front) PFC the manufacturer of Porsche Cup braking systems developed a 410mm front rotor replacement kit that is a direct replacement for the OEM 991 GT or 718 GT4 PCCB Brake rotors or OEM 718 / 982 GT4RS with PCCB or Iron 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. Sold/priced per pair.

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 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.