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Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Audi B9 RS5 REPLACEMENT ROTOR DISCS ONLY, DOES NOT INCLUDE ALUMINUM HAT. Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. The GiroDisc replacement rotor system is a direct rotor disc replacement for the GiroDisc 2-piece hat and rotor and no modifications are necessary. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement to minimize replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

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

REPLACEMENT ROTOR RINGS ONLY. INCLUDES NEW INSTALLATION HARDWARE. DOES NOT INCLUDE ALUMINUM HATS. Thunderhill is an authorized dealer for Girodisc products. As one of the largest stocking dealers in the country, we ship most Girodisc products the same or next business day to ensure we meet your delivery deadline. These Girodisc replacement rotor rings are direct replacements for the iron discs on your Girodisc two-piece rotors, and no modifications are necessary. New cap screws and washers are included with these replacement rotors. We do not recommend re-using the old hardware. The replacement rotor rings and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by Girodisc in the USA to their own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The two-piece Girodisc design allows for rotor ring-only replacement to minimize replacement costs and deliver outstanding performance and cooling. Sold/priced per pair.

REPLACEMENT ROTOR RINGS ONLY. INCLUDES NEW INSTALLATION HARDWARE. DOES NOT INCLUDE ALUMINUM HATS. Thunderhill is an authorized dealer for Girodisc products. As one of the largest stocking dealers in the country, we ship most Girodisc products the same or next business day to ensure we meet your delivery deadline. These Girodisc replacement rotor rings are direct replacements for the iron discs on your Girodisc two-piece rotors, and no modifications are necessary. New cap screws and washers are included with these replacement rotors. We do not recommend re-using the old hardware. The replacement rotor rings and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by Girodisc in the USA to their own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The two-piece Girodisc design allows for rotor ring-only replacement to minimize replacement costs and deliver outstanding performance and cooling. Sold/priced per pair.

REPLACEMENT ROTOR RINGS ONLY. INCLUDES NEW INSTALLATION HARDWARE. DOES NOT INCLUDE ALUMINUM HATS. Thunderhill is an authorized dealer for Girodisc products. As one of the largest stocking dealers in the country, we ship most Girodisc products the same or next business day to ensure we meet your delivery deadline. These Girodisc replacement rotor rings for the Nissan R35 GT-R are Girodisc's updated variant. If you're not sure these are correct for your Girodisc rotors, please contact us. They the are direct replacements for the iron discs on your Girodisc two-piece rotors, and no modifications are necessary. New cap screws and washers are included with these replacement rotors. We do not recommend re-using the old hardware. These rings will not work with factory center hats. They are designed to work with Girodisc hats only. The replacement rotor rings and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by Girodisc in the USA to their own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The two-piece Girodisc design allows for rotor ring-only replacement to minimize replacement costs and deliver outstanding performance and cooling. Sold/priced per pair.

Girodisc D1-186 Replacement Rotor Rings (Discs) Girodisc replacement rotor rings are direct replacements for the iron discs on your Girodisc A1-186 two-piece rotors, with no modifications necessary. New cap screws and washers are included with these replacement rotors. We do not recommend re-using the old hardware. (This kit is contains two cast-iron discs and associated hardware. No aluminum center hat.) The replacement rotor rings and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by Girodisc in the USA and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from braking while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. Rotor ring-only replacement helps to minimize costs and deliver outstanding performance. Sold/priced per pair.

Girodisc D2-220 Replacement Rotor Rings (380mm) Girodisc replacement rotor rings are direct replacements for the iron discs on your Girodisc A2-220 380mm two-piece rotors, with no modifications necessary. New cap screws and washers are included with these replacement rotors. We do not recommend re-using the old hardware. (This kit is contains two cast-iron discs and associated hardware. No aluminum center hat.) The replacement rotor rings and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by Girodisc in the USA and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from braking while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. Rotor ring-only replacement helps to minimize costs and deliver outstanding performance. Sold/priced per pair.

Race Technologies Racing Brake Pads RT RE10 COMPOUND1 RE10 is the ultimate endurance race compound, offering a balance of excellent stopping power, low thermal conductivity, and extremely low pad and rotor wear. Utilizing the latest friction material technology, Race Technologies RE10 offers consistent performance in the most demanding environments. Typical applications include professional endurance racing, club racing, and HPDE on high braking demand platforms. RACING PAD NOTES: Running a "racing use only" pad on the street could produce excessive noise and dust. Rotor wear could be accelerated if driven at consistently cold temperatures or used in the incorrect temperature range. Racing pads are designed to work in specific temperature ranges so it's important to choose the right compound for the environment the vehicle will be used in. Pad compounds are tested on a brake dynamometer over repeated brake applications to test the materials in a controlled environment. Real-world wear rates and temperatures will be influenced by car setup, grip levels, track layout and other variables. Note 1: "RE" denotes a "racing use only" pad compound.

Pagid Racing Brake Pad Shape No. 4945 Fits the Following Vehicles: Make Model Build (Year) Front Rear Nissan R35 GTR [ceramic brakes] 2009 - 24 X Pagid Racing Brake Pads are engineered for high-performance driving, delivering exceptional stopping power, durability, and control under the most demanding conditions. Trusted by professional racers and performance enthusiasts worldwide, these pads are crafted using advanced friction materials and cutting-edge technology to ensure consistent performance, low fade, and excellent modulation. Whether you're on the track or tackling aggressive street driving, Pagid Racing Brake Pads provide the reliability and confidence you need to push your vehicle to its limits. Pagid RSC 1 Compound (Ceramic Rotors Only) A race and track day compound for all known types of ceramic brake discs, RSC 1 is a low metallic resin bonded material containing steel and aramid fibers. This material features good all-round characteristics and is suitable for all types of usage.

Schroth Enduro Six-Point Racing Harness Endurance racing drivers need easy, fast methods to get in and out of the car during a race. The Schroth Enduro 6 Point Racing Harness uses the newest, most innovative technology to ensure quality, durability, and ease of use during quick driver changes in the most arduous conditions. The Schroth Enduro 6 Point Racing Harness is considered the fastest, easiest harness to use among many drivers. The Schroth Enduro 6 Point Racing Harness has been tested for quality and ease of use in the WEC endurance series, and in 24-hour races at legendary venues like Germany’s Nordschleife (the "Green Hell"). This Schroth Enduro 6 Point Racing Harness is at the top of its game, constructed for racers who need superior driver restraint technology. The new design of the ZIP Adjuster technology is integrated into the lap belt buckle attachments, making the position of the adjusters ideal for quick, precise tightening. The design, featuring clearly-marked belt release straps, extra large, easy-to-see, yellow hand loops on the lap belts, also ensures efficient, smooth releases and tightenings for quicker, easier driver changes. The Schroth Enduro 6 Point Racing Harness has these Zip Adjusters on the shoulder belts. A first choice for racing schools or corporate ride-along days where transitioning customers in and out of the racecar means more drivers per session! Available in black or red. See Schroth's Harness Installation Checklist Here Features: FIA Certified ZIP Adjusters in shoulder belts ensure best fit Simple and easy-to-adjust ZIP adjusters integrated into the lap belt latches Extra large, easy-to-grab hand loops on the shoulder belts Sewn-in bungee loops on the shoulder belts Two-inch (50mm) lap belts provide superior safety and comfort Patented RFR lightweight buckle Included Hardware: Six SG23 7/16" eyebolts Twelve S3 washers Two SG39 reinforcement plates

Bell KC7-CMR Champion Karting Helmet The Bell KC7-CMR Champion Karting Pro Series Helmet delivers race-proven performance and championship-inspired design for the next generation of drivers. Built on the same platform as the Bell HP7, this youth karting helmet blends modern aggressive styling with classic elements influenced by legendary champions. Designed to inspire confidence and ambition, the KC7-CMR Champion is the perfect choice for young drivers chasing podiums in competitive karting environments. Engineered with a lightweight carbon fiberglass composite shell and advanced multi-density liner, the KC7-CMR provides exceptional impact protection while maintaining comfort during long sessions. Featuring a Double Screen Anti-Fog visor, optimized aerodynamics, and a high-efficiency ventilation system, this helmet delivers superior visibility, cooling, and performance. Certified to FIA CMR-2016 standards, the KC7-CMR Champion is built specifically for youth karting and is not compatible with FHR systems. Bell KC7-CMR Champion Helmet Highlights Lightweight carbon fiberglass composite shell Approximate weight: 1,185g in sizes 54-56 and 1,230g in sizes 57-59, +/- 3% Advanced multi-density, multi-piece liner for energy absorption and impact protection Optical-grade 2mm Double Screen Anti-Fog visor for clear visibility 14-channel ventilation system for maximum airflow and driver cooling Aerodynamic shell and shield design to reduce noise and improve stability Synthetic rubber gasket seal helps prevent dirt and water intrusion Rear spoiler available separately Uses SE07 2mm visor and SV(SE07) pivot kit for KC7 helmets only Not compatible with FHR or HANS anchor systems SNELL-FIA CMR-2016 homologated for youth karting competition Bell KC7-CMR Champion Specifications Model: Bell KC7-CMR Champion Pro Series Shell Construction: Carbon fiberglass composite Weight: 1,185g sizes 54-56; 1,230g sizes 57-59, +/- 3% Visor: SE07 2mm Double Screen Anti-Fog Ventilation: 14 intake and extraction channels Homologation: SNELL-FIA CMR-2016 Sizes: 54, 55, 56, 57, 58, 59 Bell KC7-CMR Champion Pro Series FAQs Is the Bell KC7-CMR Champion helmet FIA approved?Yes. The Bell KC7-CMR Champion is homologated to SNELL-FIA CMR-2016 standards for youth karting competition. Can the Bell KC7-CMR Champion be used with a HANS or FHR device?No. The KC7-CMR is not compatible with FHR anchor systems or HANS devices. What visor does the Bell KC7-CMR Champion use?The KC7-CMR uses the SE07 2mm Double Screen Anti-Fog visor with the SV(SE07) pivot kit. This shield system fits the KC7 range only. Who is the Bell KC7-CMR Champion designed for?It is designed for junior and youth karting drivers who need a lightweight, CMR-certified karting helmet for competitive racing. Bell KC7-CMR Champion Helmet Size Chart  

OMP FIRST Evo Racing Fire Suit FIA 8856-2018 HOMOLOGATED Two layer overall with modern two-tone design featuring an excellent quality/comfort/price ratio. OMP First Evo two-layer suit with modern two-tone design featuring an excellent quality/comfort/price ratio. External layer in aramidic fiber for high use and washing resistance, inner fabric in soft knitted material. Floating sleeves, antirubbing ultra flat seams. Elastic inserts on the back and in the groin for better comfort and flexibility. Breathable inserts on the sleeves plus a comfortable hidden inner pocket. NEW MODEL, LIGHTER THAN PREVIOUS MODEL FIA increases the safety in motorsport with the release of new standard FIA 8856-2018 for fire retardant racewear.The new standard establishes the requirements for design and performance in terms of increased protection against flames and against heat transmission, mechanical resistance and tensile strength. OMP FIRST EVO DRIVER RACE SUIT PROTECTION Certified to FIA 8856-2018 homologation standard. Lightweight and breathable two-layer suit OMP FIRST EVO DRIVER RACE SUIT KEY FEATURES Two-layer suit construction Soft-knitted inner material Floating arms with elastic bellows Ultra-flat anti rubbing seams Classic-fit design. Weight: 385 g/m2

Thunderhill is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline. Fits Honda S2000 The GiroDisc system is an upgrade to a 2-piece steel rotor and aluminum hat combination and is a direct replacement for the OEM brake disc. The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. The Giro Disc rotors are lighter than OEM pieces. The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response. When used with Pagid or PFC performance brake pads, and Thunderhill RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors. The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors. The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling. Sold/Priced per pair.

IPD Competition Plenum for Porsche 981 (2.7L) This plenum requires a Bosch 82mm throttle body, which can be added to your order above for only $225 (save $100). The product of an extensive R&D program, IPD's 82mm Competition Plenum delivers excellent performance and value. The Competition Plenum upgrades the factory 74mm throttle body to the larger 997 GT3 82mm throttle body. This combination has proven to be the most popular and deliver even more performance. Porsche made a few upgrades to the 981 intake versus the 987; most notably, the 981 draws outside air from both driver- and passenger-side air intakes instead of the driver-side only. IPD developed a custom silicone hose designed to perfectly fit the larger 82mm TB and considerably improve air flow. Their 981 plenum also benefits from the internal dimpling effect they've implemented on all plenums. This internal dimpling allows IPD to control the boundary layer and maximize air flow within the plenum. Just like a dimpled golf ball travels farther, controlled turbulent air creates less friction and "tumbles" over a given area more efficiently. Power gains with the IPD 981 Competition Plenum are +20 HP and +16 lbs-ft. of torque at the wheels. The bulk of the power gains from the IPD plenum begin at 4000 RPM, become fully realized at 6000 RPM, and continue all the way to redline. IPD performance gains stay above factory power and torque curves throughout the entire rev range.

IPD Competition Plenum for Porsche 981 S (3.4L) This plenum requires a Bosch 82mm throttle body, which can be added to your order above for only $225 (save $100). The product of an extensive R&D program, IPD's 82mm Competition Plenum delivers excellent performance and value. The Competition Plenum upgrades the factory 74mm throttle body to the larger 997 GT3 82mm throttle body. This combination has proven to be the most popular and deliver even more performance. Porsche made a few upgrades to the 981 intake versus the 987; most notably, the 981 draws outside air from both driver- and passenger-side air intakes instead of the driver-side only. IPD developed a custom silicone hose designed to perfectly fit the larger 82mm TB and considerably improve air flow. Their 981 plenum also benefits from the internal dimpling effect they've implemented on all plenums. This internal dimpling allows IPD to control the boundary layer and maximize air flow within the plenum. Just like a dimpled golf ball travels farther, controlled turbulent air creates less friction and "tumbles" over a given area more efficiently. Power gains with the IPD 981 Competition Plenum are +20 HP and +16 lbs-ft. of torque at the wheels. The bulk of the power gains from the IPD plenum begin at 4000 RPM, become fully realized at 6000 RPM, and continue all the way to redline. IPD performance gains stay above factory power and torque curves throughout the entire rev range.

IPD Competition Plenum for Porsche 981 Spyder/GT4 Once again, Porsche left the door open for engine performance improvements with the 981 Boxster Spyder and Cayman GT4. Using the same factory intake found on the less-powerful 981 S and GTS models, despite using the 911 Carrera S 3.8L engine, the intake's 74mm throttle body limits power and torque to keep the 981 from treading too close to the 911. As a result, Porsche's 991 Carrera S delivers 420 HP while the GT4 makes 385 HP with the same engine. Why does the GT4 produce 35 fewer horses? (The GT4 engine is only 15 HP stronger than the base Carrera 3.4L engine!) The Carrera S engine, with its 82mm throttle body, benefits from the IPD Plenum, so it figures the GT4 would really benefit from an IPD Competition Plenum and 82mm throttle body. Initial dyno tests performed in Germany showed gains of 18 HP and 17 lbs-ft. of torque at the GT4's wheels. Considering that the 981's ECU requires more adaptation time than other Porsche models (over a hundred miles for the full adaptive process), this means the full performance gains for the GT4 will be even greater. Thunderhill installed the IPD Competition Plenum and 82mm TB on our GT4 and were immediately impressed with the increased mid-range and top-end power and torque, and throttle response. The IPD plenum delivers net gains throughout both power and torque curves, helping the GT4 compete with its GT3 big brother. This plenum requires a Bosch 82mm throttle body, which can be added to your order above for only $225 (save $100).