Antigravity Batteries
Antigravity H8/Group-49 Lithium Car Battery
from $1,049.99
Antigravity Lithium Car Battery
The Antigravity H8/Group 49 Lithium Car Battery is the ultimate OEM-sized upgrade for high-performance and exotic vehicles like Ferrari. Built for drivers who demand more power and less weight, this lithium battery delivers up to 2000 cranking amps while shedding nearly 40 lbs compared to stock. With built-in wireless jump-starting and advanced battery management, it's a smarter, lighter, and more reliable solution.
Big Power – OEM Fit – Built-In Jump Start.
Antigravity H8 Battery Features:
OEM Group 49 (H8) case size: 14" x 7" x 7.5" — direct drop-in replacement
Available in 60Ah (1800CA) and 80Ah (~2000CA) configurations
RE-START Technology: Wireless jump-starting built in—just press the key fob button
Complete Battery Management System (BMS) with thermal, overcharge, short circuit, and cell-balancing protection
Ultra-lightweight: up to 70% lighter than lead-acid—drop nearly 40 lbs instantly!
Safe LiFePO4 lithium chemistry for stable, long-lasting performance
Threaded M8x1.25 terminals for secure, performance-grade installation
Antigravity H8/Group 49 Battery FAQs:
What makes this battery different from a standard AGM? It weighs 70% less, delivers 2–3x the cranking amps, and includes wireless jump-start tech built right in.
Which applications is the H8 size ideal for? High-performance and exotic vehicles requiring Group 49 case size—especially Ferraris where higher Ah is critical due to parasitic draw.
Can I install this myself? Yes. It’s a plug-and-play drop-in for any car using an H8/Group 49 battery—no modifications or spacers needed.
Does the BMS protect the battery over time? Absolutely. The built-in BMS ensures safe charging, usage, and storage conditions to prolong battery life.
Unlock reliable power, serious weight savings, and built-in jump-starting with the Antigravity H8/Group 49 Lithium Battery—the best drop-in solution for your performance vehicle.
Performance Vehicles That Use H8 Size:
Ferrari
NEW! Lightweight Lithium Batteries with Wireless Remote Built-In Jump Starting!
Antigravity Batteries has changed the game again with their latest Lithium-Ion Car Batteries. The newest RE-START line of batteries offers built-in WIRELESS Jump-Starting! That means if your battery is ever discharged, simply press the button on the provided key fob, start the car, and drive away! No need for a jump starter or roadside assistance. You don’t even have to open the hood—activate it from inside your vehicle!
If you want to track your battery status via Bluetooth, you can use the Bluetooth Battery Tracker PLUS (sold separately).
Sparco S.p.A.
Sparco Pilot QRT Racing Seat
$1,049.00
Sparco Pilot QRT Racing Seat
The Sparco Pilot QRT is one of the largest composite racing seats available, engineered to accommodate bigger and taller drivers without sacrificing safety or weight. Built with Sparco’s QRT (Quick Resin Technology) fiberglass shell, it delivers ultra-light strength, integrated head bolsters, and deep side bolsters for maximum lateral support. The shell is wrapped in impact-absorbing, fire-retardant fabric with non-slip zones in the shoulders and seat base.
Compatible with HANS devices and FIA approved, the Pilot QRT provides secure ergonomics for endurance stints and high-G corners.
Specifications
Manufacturer: Sparco
Part Number: 008018RNR
Homologation: FIA 8855-1999
Shell: QRT ultralight fiberglass composite
Mounting: Side-mount
Driver Fit: Largest/tallest Sparco profile
Compatibility: HANS device
Upholstery: Fire-retardant with non-slip inserts
What is Sparco QRT?
Developed in Italy using aerospace-inspired methods, QRT is a patented process that achieves exceptional strength-to-weight, reducing shell weight by up to 30% versus traditional fiberglass while approaching carbon-fiber performance at a lower cost.
Pilot QRT Technology
QRT ultralight fiberglass shell
Integrated head protection and deep side bolsters
Ergonomic support for larger/taller drivers
Fire-retardant, grippy upholstery
FIA 8855-1999 approved; HANS compatible
Dimensions
Competition Motorsport | sales@competitionmotorsport.com | (844) 438-7244
Pagid
Pagid Racing Brake Pads No. 8269 (Front) | Ceramic Brakes
$1,032.22
Pagid Racing Brake Pad Shape No. 8269
Fits the Following Vehicles:
Make
Model
Years
Front
Rear
McLaren
600LT [ceramic brakes]
2019 - 21
X
McLaren
720S [ceramic brakes]
2017 - 23
X
McLaren
620R [ceramic brakes]
2019 - 21
X
McLaren
Artura [ceramic brakes]
2023 +
X
McLaren
GTS [ceramic brakes]
2024 +
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.
GiroDisc Racing Brakes & Technologies
D1-123 Girodisc Mercedes 390mm Front Replacement Rings
$1,030.00
D1-123 Girodisc Mercedes 390mm Front Replacement Rings
Maintain the uncompromising stopping performance of your AMG with Girodisc D1-123 390mm front replacement rings. These precision-engineered rings are designed as direct replacements for Girodisc’s two-piece systems, bolting to your existing aluminum hats using the supplied floating hardware kit. Each rotor is machined from Girodisc’s proprietary high-carbon cast iron to deliver outstanding heat control, consistent braking feel, and fade resistance in both spirited road and track use.
Vehicle Fitment
Compatible with:• Mercedes-Benz C63 AMG (W204, 2008–2015)• Mercedes-Benz E63 AMG (W212, 2010–2016)• Mercedes-Benz CLS63 AMG (C218, 2012–2017)• Mercedes-Benz S63 AMG (W222, 2014–2017) – Iron rotor conversionNote: Designed for Girodisc 390mm two-piece front rotor systems. Not compatible with OEM one-piece or carbon-ceramic discs.
Features
• Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 390mm two-piece front rotors• CNC-machined from high-carbon iron alloy for superior heat resistance• Directional curved vanes maximize airflow and cooling efficiency• Maintains factory brake bias, ABS, and ESP calibration• Precision-balanced to eliminate vibration and maintain pedal feel• Designed exclusively for Girodisc aluminum hats
Specifications
• Diameter: 390 mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and hardware kit• Sold/priced per pair
Girodisc D1-123 Mercedes 390mm Front Replacement Ring FAQs
Can these fit the factory AMG rotor hats? No. The D1-123 rings are designed exclusively for Girodisc aluminum hats and cannot mount to OEM one-piece or carbon-ceramic assemblies.
What pad compounds pair best with these rotors? For street and light track use, Ferodo DS2500 or Pagid RS29 pads perform well. For dedicated track work, use Pagid RSL1 or Endless ME20 for optimal friction and fade resistance.
Do these rotors require a specific bedding process? Yes. Perform 8–10 moderate stops from 60 mph to evenly transfer pad material, then allow the brakes to cool completely before hard use.
Are these rotors directional? Yes. Each ring is labeled for left or right installation to ensure proper airflow through the internal vanes for maximum cooling.
Upgrade your AMG’s braking capability with Girodisc D1-123 390mm front replacement rings — engineered for performance, heat control, and reliability under the most demanding conditions.
GiroDisc Racing Brakes & Technologies
D1-163 Girodisc 390x34mm Front Replacement Rings
$1,030.00
Girodisc 390x34mm Front Rings
Service your performance braking system with Girodisc D1-163 390x34mm front replacement rings. These precision-machined components bolt directly to your existing Girodisc aluminum hats using the supplied floating hardware kit. Each ring is crafted from Girodisc’s proprietary high-carbon cast iron alloy to ensure exceptional heat dissipation, consistent friction characteristics, and long-term reliability under heavy braking loads.
Vehicle Fitment
Compatible with:• Custom and motorsport applications using Girodisc 390x34mm two-piece front rotors• Commonly fitted to upgraded systems on Porsche, BMW, and Audi track platforms using large six-piston calipersNote: Designed exclusively for Girodisc 390x34mm two-piece front rotor systems. Verify hat bolt pattern and offset before installation.
Features
• Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 390x34mm two-piece front rotors• CNC-machined from high-carbon cast iron for optimal thermal stability• Directional curved vanes channel airflow for maximum cooling• Maintains proper brake bias and ABS calibration• Precision-balanced to prevent vibration or pulsation• Designed exclusively for Girodisc aluminum hats
Specifications
• Diameter: 390 mm• Thickness: 34 mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and new hardware kit• Sold/priced per pair
Girodisc D1-163 Front Replacement Ring FAQs
What cars typically use this 390x34mm rotor size? This ring size is common on large six-piston BBK setups from Brembo, AP Racing, and StopTech used on Porsche 991, BMW F8X, and Audi RS applications when fitted with Girodisc hats.
Can these be installed on non-Girodisc hats? No. The mounting pattern and float hardware are specific to Girodisc aluminum hats. Using other hats may cause clearance or balance issues.
What torque should I apply to the floating hardware? Torque each bolt to 12 ft-lbs (16 Nm) with blue Loctite. Recheck after the first heat cycle to ensure hardware seating.
How do I know when it’s time to replace the rings? Replace when rotor thickness reaches the minimum spec or if radial cracking extends beyond 70% of the face slot length — whichever occurs first.
Girodisc D1-163 390x34mm front replacement rings deliver precision, durability, and race-proven performance for drivers demanding the highest level of stopping power and thermal control.
GiroDisc Racing Brakes & Technologies
D1-238 Girodisc 380mm Front Replacement Rings
$1,030.00
Girodisc Porsche 991 Cup, GT4 Clubsport Front Replacement Rings (380x32)
Restore the elite braking performance of your Porsche Cup or Clubsport with Girodisc D1-238 380x32mm front replacement rings. Engineered for uncompromising precision, these rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Crafted from high-carbon cast iron, they provide superior heat management, fade resistance, and consistent pedal feel under extreme race conditions.
Vehicle Fitment
Compatible with:• Porsche 991 Cup (2013–2019, front)• Porsche 981 GT4 Clubsport (front)• Porsche 718 GT4 Clubsport (front)Note: Designed exclusively for Girodisc 380x32mm two-piece front rotor systems. Not compatible with OEM PCCB or one-piece rotors.
Features
• Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 380x32mm two-piece front rotors• CNC-machined from proprietary high-carbon cast iron for superior strength and cooling• Directional curved vanes maximize airflow and heat dissipation• Balanced and precision-machined for vibration-free performance• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 380mm• Thickness: 32mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and new hardware kit• Sold/priced per pair
Girodisc D1-238 Porsche 991 Cup / GT4 Clubsport Front Replacement Ring FAQs
Do these fit factory Porsche Cup rotor hats? No. The D1-238 rings are designed exclusively for Girodisc aluminum hats and will not mount to OEM or AP Racing hats.
Can they handle sustained race heat cycles? Absolutely. Girodisc’s high-carbon alloy and curved vane design deliver outstanding thermal capacity for endurance and sprint racing.
Are these compatible with the Porsche 718 GT4 Clubsport? Yes. They fit all 981 and 718 GT4 Clubsport models equipped with 380x32mm front Girodisc systems.
How do they compare to OEM Cup rotors? Girodisc rotors offer reduced unsprung weight, lower running costs, and more consistent friction characteristics under repeated braking.
Upgrade your Porsche 991 Cup or GT4 Clubsport with Girodisc D1-238 380x32mm front replacement rings — precision-engineered for cooling, endurance, and repeatable braking control lap after lap.
GiroDisc Racing Brakes & Technologies
D2-238 Girodisc 380mmm Rear Replacement Rotor Rings
$1,030.00
Girodisc D2-238 Porsche 991 Cup / GT4 Clubsport Rear Replacement Rotor Rings (380x30)
The Girodisc D2-238 Rear Replacement Rotor Rings are precision-engineered replacements for Girodisc two-piece rear rotors on the Porsche 991 Cup Car and Cayman GT4 Clubsport. Designed to restore factory braking performance and cooling efficiency, these 380x30mm rotor rings are built for the demands of professional motorsport.
Race-Ready Engineering. Factory-Perfect Fit.
Manufactured in the USA from Girodisc’s proprietary cast iron alloy, each rotor ring is optimized for strength, consistency, and high thermal capacity. The curved vane internal design acts as a centrifugal pump, forcing air through the rotor to maximize cooling and minimize fade. Sold as a pair, the kit includes all new hardware and is designed to bolt directly to your existing Girodisc aluminum hats for a simple, precise installation.
Features
• Size: 380mm x 30mm• Direct replacement rings for Girodisc Porsche 991 Cup and GT4 Clubsport rear rotors• Cast from Girodisc proprietary high-carbon iron alloy in the USA• Curved vane internal geometry for improved airflow and cooling• Includes all new hardware (drive pins, washers, and bolts)• Reuses Girodisc aluminum hats• Not compatible with OEM or non-Girodisc hats• Sold/priced per pair
Vehicle Fitment
• Porsche 991 GT3 Cup (All Years) – Rear• Porsche Cayman GT4 Clubsport (981 & 982) – Rear• Designed for Girodisc two-piece rotor systems• Will not fit OEM two-piece rotors or other aftermarket hats
Girodisc D2-238 Porsche 991 Cup / GT4 Clubsport Rear Replacement Rings FAQs
Can I reuse my aluminum hats? Yes. These replacement rings bolt directly to your existing Girodisc aluminum hats with the supplied hardware.
Do these fit OEM or factory rotors? No. Girodisc replacement rings are engineered specifically for Girodisc two-piece systems and are not compatible with OEM or other aftermarket hats.
What’s included in the package? Two iron rotor rings (left and right) and a full hardware kit for reassembly.
Are the rotors directional? Yes. Each rotor features directional curved vanes for optimal airflow and cooling efficiency—ensure correct orientation during installation.
Are they sold individually or as a set? The Girodisc D2-238 Rear Replacement Rotor Rings are sold and priced per pair, complete with hardware.
What benefits do these offer over OEM rotors? Girodisc rotors reduce unsprung weight, improve cooling efficiency, and maintain consistent pedal feel and braking balance under the harshest track conditions.
Maintain championship-level braking performance with Girodisc D2-238 380x30mm Rear Replacement Rotor Rings—crafted in the USA to deliver maximum precision, cooling, and reliability for Porsche 991 Cup and GT4 Clubsport race cars.
GiroDisc Racing Brakes & Technologies
D2-174 Girodisc Acura NSX Rear Replacement Rings
$1,030.00
Girodisc Acura NSX Rear Replacement Rings
Refresh your Acura NSX’s braking performance with Girodisc 350mm rear replacement rings. Built for precision and endurance, these high-carbon iron rings are direct replacements for Girodisc two-piece rotors, maintaining your NSX’s balance of power, control, and stopping confidence.
Vehicle Fitment
Compatible with:• 2017–2022 Acura NSX (NC1)• 1991–2005 Acura NSX (with Girodisc or compatible 350mm rear rotor systems)Note: These are friction rings only. They mount directly to existing Girodisc aluminum hats using the included floating hardware kit.
Precision-Built for Consistent Braking
Each Girodisc replacement ring is cast from a proprietary high-carbon iron alloy and machined to exacting tolerances in the USA. The rotor’s directional curved vane design acts as a centrifugal air pump, drawing cooling air through the rotor to reduce heat buildup and prevent brake fade. Whether you’re carving backroads or pushing your NSX to its limits on track, Girodisc ensures reliable braking with smooth pedal feedback and long-term durability.
Features
• Direct replacement for 350mm Girodisc rear rotor assemblies• Designed for Acura NSX (NC1) and earlier models equipped with Girodisc systems• High-carbon cast iron delivers superior heat stability and longevity• Curved directional vanes maximize airflow and cooling• Precision machined and balanced in the USA• Includes full floating hardware kit• Sold/priced per pair
Specifications
• Diameter: 350mm• Position: Rear• Material: High-carbon cast iron• Includes: Two rotor rings and full hardware kit• Made in the USA• Sold/priced per pair
Girodisc D2-174 Replacement Ring FAQs
Will these fit factory NSX brake setups? No. These are designed for use with Girodisc two-piece rotor systems or equivalent aftermarket aluminum hats.
Do these include new hardware? Yes. Each set includes new floating hardware—pins, bolts, and washers—for a complete, ready-to-install replacement.
Are these compatible with both NSX generations? Yes. They fit directly on second-gen (NC1) NSX models and first-gen NSX cars equipped with Girodisc 350mm rear brake kits.
What makes Girodisc rotors better than OEM? Girodisc rotors are lighter, cooler-running, and fully serviceable. The two-piece design allows you to replace just the iron rings instead of the entire rotor assembly, saving cost over time.
Upgrade your NSX’s stopping power with Girodisc D2-174 350mm rear replacement rings — race-proven performance, precision manufacturing, and American quality in every set.
GiroDisc Racing Brakes & Technologies
D1-174 Girodisc Acura NSX Front Replacement Rings
$1,030.00
Girodisc Acura NSX Front Replacement Rings
Bring your Acura NSX braking system back to peak performance with Girodisc 370mm front replacement rings. Designed as direct replacements for existing Girodisc two-piece rotor assemblies, these high-carbon iron rings deliver the heat control, balance, and precision stopping power the NSX platform demands.
Vehicle Fitment
Compatible with:• 2017–2022 Acura NSX (NC1)• 1991–2005 Acura NSX (with Girodisc or comparable 370mm big brake kit)Note: These are friction rings only. They attach directly to existing Girodisc aluminum hats using the supplied hardware kit.
Engineered for Performance and Longevity
Each Girodisc replacement ring is made from a proprietary high-carbon cast iron alloy, developed to handle the extreme heat and stress of performance driving. Precision-machined and balanced in the USA, these rings feature a curved vane internal design that acts as a centrifugal air pump, drawing air through the rotor to maintain consistent cooling under high-speed braking. Whether you’re on canyon roads or the track, Girodisc ensures consistent pedal feel and fade-free braking.
Features
• Direct replacement for 370mm Girodisc front rotor assemblies• Designed for Acura NSX (NC1) and earlier models with Girodisc big brake kits• High-carbon iron construction for thermal stability and durability• Curved directional vanes improve airflow and cooling• Machined, balanced, and finished in the USA• Includes new floating hardware kit• Sold/priced per pair
Specifications
• Diameter: 370mm• Position: Front• Material: High-carbon cast iron• Includes: Two rotor rings and full hardware kit• Made in the USA• Sold/priced per pair
Girodisc D1-174 Replacement Ring FAQs
Are these compatible with OEM NSX rotors? No. These replacement rings are designed specifically for Girodisc two-piece rotor systems or equivalent aluminum-hat setups.
Do they include hardware? Yes. Each pair ships with a complete hardware kit including floating pins, washers, and bolts.
Will these work on both first- and second-generation NSX models? They fit directly on the second-gen NSX (NC1) and first-gen models equipped with Girodisc 370mm rotor systems or compatible hats.
Are these suitable for track driving? Absolutely. Girodisc rotors are built for high-performance and endurance use, maintaining stable braking through repeated high-heat cycles.
Restore the legendary stopping power of your NSX with Girodisc D1-174 370mm front replacement rings — precision-engineered, American-made, and built for uncompromising performance.
GiroDisc Racing Brakes & Technologies
D1-287 Girodisc Porsche 992 GT3 Cup Front Replacement Rings
$1,030.00
Porsche 992 GT3 Cup Front Replacement Rings
Restore world-class braking performance to your Porsche 992 GT3 Cup with the Girodisc D1-287 Front Replacement Rings. Engineered for endurance and precision, these 410x36mm iron rotor rings are direct replacements for Girodisc two-piece front rotors used in competition or iron conversion applications. Built to withstand extreme thermal loads and track punishment, the D1-287 rings deliver consistent, fade-free braking lap after lap.
Each ring is machined from Girodisc’s proprietary U.S.-poured high-carbon cast iron, chosen for its exceptional strength, heat resistance, and stability. Designed with 48 curved directional vanes, these rotors channel air efficiently for superior cooling and reduced thermal stress. The result is braking performance you can rely on through every corner, every lap, every session.
Features and Benefits
Direct replacement rings for Girodisc 992 GT3 Cup 410x36mm two-piece front rotors
Machined from proprietary U.S.-poured high-carbon cast iron for maximum thermal stability
48 curved directional vanes for optimal cooling and consistent performance
Lightweight two-piece floating design reduces unsprung mass and enhances handling
Includes all new hardware: drive pins, bolts, and washers
Precision machined, balanced, and assembled in the USA
Vehicle Fitment
2022+ Porsche 911 GT3 Cup (992)
These replacement rings are designed exclusively for Girodisc aluminum hats. They will not fit OEM or other aftermarket hat systems. This set replaces the original Girodisc front assemblies used in GT3 Cup and iron conversion configurations.
Why Choose Girodisc
Girodisc has set the standard for performance braking systems through precision engineering and uncompromising quality. Each rotor ring is developed for motorsport environments, ensuring consistent friction characteristics and resistance to thermal cracking under the most demanding conditions. With the D1-287 rings installed, your Porsche 992 GT3 Cup will brake with the same confidence and control that define true race-winning performance.
FAQs
Do these include the aluminum hats?No. The D1-287 kit includes only the iron rotor rings and a complete hardware kit. Your existing Girodisc hats are reused.
Can I install these with factory Porsche rotors?No. Girodisc replacement rings are engineered specifically for Girodisc hats and will not fit OEM or other aftermarket systems.
Are the rotors directional?Yes. Each ring features curved internal vanes that must be installed on the correct side for optimal airflow and cooling efficiency.
What’s included?Two 410x36mm front rotor rings (left and right) and a full hardware kit including new drive pins, bolts, and washers.
Ready to Refresh?
Bring your Porsche 992 GT3 Cup back to full braking potential with Girodisc D1-287 Front Replacement Rings. Designed for uncompromising performance on the track, these rotor rings deliver the cooling, balance, and durability needed for every race-winning lap. Order your set today from Competition Motorsport and keep your GT3 Cup braking with factory precision and motorsport strength.
GiroDisc Racing Brakes & Technologies
D2-287 Girodisc Porsche 992 GT3 Cup Rear Replacement Rings
$1,030.00
Porsche 992 GT3 Cup Rear Replacement Rings
Keep your Porsche 992 GT3 Cup performing at its peak with the Girodisc D2-287 Rear Replacement Rings. Designed for serious racers and track-day purists, these high-performance 380x34mm iron rings are direct replacements for Girodisc’s two-piece rear rotors, offering the same exceptional strength, cooling, and balance demanded by professional motorsport.
Each ring is machined from Girodisc’s proprietary high-carbon cast iron alloy, poured and finished entirely in the USA. With 48 curved directional vanes and a floating two-piece design, these replacement rings deliver consistent braking performance, improved heat management, and reduced unsprung weight—essential for precision braking on the track.
Features and Benefits
Direct replacement rings for Girodisc 992 GT3 Cup rear two-piece rotors
Machined from proprietary U.S.-poured high-carbon cast iron for superior heat control
48 curved directional vanes maximize airflow and cooling efficiency
Lightweight two-piece design minimizes unsprung mass for improved chassis response
Includes new hardware: drive pins, bolts, and washers
Fully machined, balanced, and assembled in the USA
Vehicle Fitment
2022+ Porsche 911 GT3 Cup (992)
These rings are designed exclusively for Girodisc aluminum hats and are not compatible with OEM or other aftermarket hat systems. They are a direct replacement for Girodisc rear assemblies used in competition or iron conversion setups.
Why Choose Girodisc
Girodisc is the benchmark in motorsport braking systems. Built for the extreme thermal loads of track racing, every rotor is precision-balanced and engineered to maintain consistent pad contact, cooling efficiency, and braking stability. The D2-287 replacement rings bring your Girodisc system back to new, ensuring your GT3 Cup continues braking as hard as it accelerates.
FAQs
Do these include the aluminum hats?No. The D2-287 kit includes only the rotor rings and new hardware. Your existing Girodisc hats are reused.
Can these be used with factory Porsche rotors?No. Girodisc replacement rings are designed specifically for Girodisc two-piece rotors and will not fit OEM or other aftermarket systems.
Are these rotors directional?Yes. Each rotor ring features curved internal vanes and must be installed on the correct side for proper airflow and cooling.
What’s included?A pair of rear rotor rings (left and right) and a full hardware kit with drive pins, bolts, and washers.
Ready to Refresh?
Restore your Porsche 992 GT3 Cup’s braking system to peak performance with the Girodisc D2-287 Rear Replacement Rings. Designed for race conditions and precision driving, these rings deliver the strength, balance, and cooling efficiency your car deserves. Order your set today from Competition Motorsport and get back to dominating every corner and braking zone.
GiroDisc Racing Brakes & Technologies
D1-066 Girodisc 380×34 Front Replacement Rings
$1,030.00
D1-066 Girodisc 380x34mm Front Replacement Rotor Rings
Maintain the stopping power of your high-performance braking system with Girodisc D1-066 380x34mm front replacement rings. Designed for use with Girodisc two-piece rotor assemblies, these rings bolt directly to your existing aluminum hats using the included floating hardware kit. Each rotor is machined from Girodisc’s proprietary high-carbon cast iron alloy, delivering exceptional thermal capacity, fade resistance, and consistent friction for both street and track applications.
Vehicle Fitment
Universal fit for vehicles using Girodisc 380x34mm two-piece front rotor systems, including:• Performance brake conversions using 380x34mm rotors• Custom Brembo GT, AP Racing, and StopTech systems adapted for Girodisc hardwareNote: These replacement rings are designed exclusively for Girodisc aluminum hats. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 380x34mm two-piece front rotors• High-carbon iron alloy construction provides excellent thermal stability• Directional curved vanes promote airflow and reduce heat buildup• Maintains proper brake balance and ABS function when used in matched systems• Precision-balanced for vibration-free braking• Designed for track, competition, and performance street applications
Specifications
• Diameter: 380 mm• Thickness: 34 mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and complete hardware kit• Sold/priced per pair
Girodisc D1-066 380x34mm Front Ring FAQs
Can these rotors fit OEM performance systems? No. These are designed for Girodisc two-piece aluminum hats and are not compatible with OEM or other aftermarket cast rotor assemblies.
What pad compounds are recommended? For dual-use street and track driving, Ferodo DS1.11 or Pagid RS29 pads are ideal. For endurance racing, Pagid RSL1 provide exceptional high-temperature stability.
Do these require a specific bedding procedure? Yes. Perform 8–10 medium stops from 60 mph, then allow the brakes to cool fully. This ensures proper pad transfer and optimal rotor surface conditioning.
What torque should I apply to the floating hardware? Tighten all bolts to 12 ft-lbs (16 Nm) using blue Loctite. Recheck torque after one full heat cycle to confirm secure float and alignment.
Keep your braking system race-ready with Girodisc D1-066 380x34mm front replacement rings — engineered for precision, endurance, and superior heat control on street or circuit.
GiroDisc Racing Brakes & Technologies
D2-272 Girodisc Porsche 992 GT3, GT4 RS Rear Replacement Rings
$1,030.00
Girodisc Porsche 992 GT3, GT4 RS Rear Replacement Rings
Keep your Porsche’s braking system performing at its best with Girodisc D2-272 rear replacement rings. Designed as direct replacements for Girodisc two-piece rotor assemblies, these high-performance 380mm rings restore cooling efficiency, reduce fade, and maintain optimal pedal feel lap after lap.
Vehicle Fitment
Compatible with:• 2022–2025 Porsche 911 GT3 (992)• 2023–2025 Porsche 718 Cayman GT4 RS• 2023–2025 Porsche 718 Spyder RSNote: These are friction rings only. They attach to existing Girodisc aluminum hats using the supplied floating hardware kit.
Precision-Crafted for Track and Street
Each Girodisc rotor ring is cast from a proprietary high-carbon iron alloy and machined in-house in the USA. The 72 curved directional vanes are designed to act as a centrifugal pump, pulling air through the disc to maximize cooling and stability under extreme heat. Whether you’re attacking corners on a race circuit or pushing hard on mountain roads, Girodisc rotors deliver consistent, confident braking.
Features
• Direct replacements for Girodisc 380mm rear rotors• Fits Porsche 992 GT3, GT4 RS, and Spyder RS models• Proprietary high-carbon iron construction for superior heat resistance• Curved directional vanes enhance airflow and cooling• Precision machined, balanced, and finished in the USA• Includes new floating hardware kit• Sold/priced per pair
Specifications
• Diameter: 380mm• Position: Rear• Material: High-carbon cast iron• Includes: Two rotor rings and full hardware kit• Made in the USA• Sold/priced per pair
Girodisc D2-272 Replacement Ring FAQs
Are these compatible with OEM Porsche rotors? No. These rings are designed for Girodisc two-piece systems and will not fit factory one-piece or PCCB rotors.
Do the rings come with hardware? Yes. Each set includes a full floating hardware kit with pins, bolts, and washers for an easy installation.
Can these be used for track driving? Absolutely. Girodisc rotors are race-proven and built to handle sustained high temperatures without warping or fade.
How often should replacement rings be changed? Replace them when the rotor reaches its minimum thickness or shows cracking that extends to the edge of the disc.
Renew your Porsche’s braking confidence with Girodisc D2-272 rear replacement rings — precision-built for the 992 GT3 and GT4 RS, combining world-class craftsmanship with proven track performance.
GiroDisc Racing Brakes & Technologies
D1-320 Girodisc Corvette C8, Camaro 398mm Front Replacement Rings
$1,030.00
Girodisc Corvette C8, Camaro 398mm Front Replacement Rings
Refresh the braking performance of your Corvette C8 or Camaro with Girodisc 398mm Front Replacement Rings. Designed as direct replacements for existing Girodisc two-piece rotors, these rings let you reuse your aluminum hats, saving cost and maintaining the precision balance and performance your car was built for. Each pair comes complete with new hardware for a perfect fit.
Engineered for Track-Level Performance
Each Girodisc replacement ring is machined in the USA from high-quality, proprietary cast iron and features a race-proven curved vane design. This configuration draws cooling air through the rotor, enhancing thermal control and ensuring consistent braking during high-speed track sessions or spirited driving. The result is fade-free performance and long-term durability.
Features
Sold as a pair and includes new replacement hardware
Direct replacement for Girodisc two-piece front rotors
Reuse your existing Girodisc aluminum hats to save cost and time
Made from proprietary U.S.-poured cast iron for durability and heat management
Curved vane internal design promotes maximum airflow and cooling
Fully machined, balanced, and finished in the USA
Vehicle Fitment
2020–2025 Chevrolet Corvette C8 (all trims equipped with Girodisc 398mm front rotors)
2016–2024 Chevrolet Camaro SS, ZL1, and 1LE models with Girodisc 398mm front rotors
Corvette C8, Camaro 398mm Front Replacement Rings FAQs:
Do these fit OEM two-piece rotors? No. These rings are specifically designed for Girodisc two-piece rotor systems and will not fit OEM or other aftermarket hats.
What’s included in the kit? Two 398mm replacement rings, new hardware, and installation instructions. Your Girodisc aluminum hats are reused.
When should I replace my rings? Replace when minimum thickness is reached or if cracking, warping, or heat checking occurs.
Do I need to replace both sides at the same time? Yes. Always replace both front rings together for balanced braking and even wear.
Can I install these myself? Skilled DIYers can install them, but Girodisc recommends professional installation to ensure proper torque specs and safety.
Are these balanced? Yes. Each Girodisc ring is precision-balanced for smooth, vibration-free braking performance.
Please note: Girodisc replacement rings are designed exclusively for use with Girodisc hats unless otherwise specified.
GiroDisc Racing Brakes & Technologies
D2-155 Girodisc Rear Replacement Rotor Rings
$1,030.00
D2-155 Girodisc Rear Replacement Rotor Rings
One pair of Girodisc 380mm steel replacement rotor rings for the Girodisc A2-155 two-piece floating rotor system for the Porsche Cayman GT4 with oem steel brakes. Includes all necessary hardware to safely replace both worn rotor rings.
INCLUDES TWO REPLACEMENT ROTOR RINGS AND ASSOCIATED HARDWARE.
GiroDisc Racing Brakes & Technologies
D2-156 Girodisc Rear Replacement Rotor Rings
$1,030.00
D2-156 Girodisc Rear Replacement Rotor Rings
REPLACEMENT ROTOR DISCS ONLY, DOES NOT INCLUDE ALUMINUM HAT.
Competition Motorsport is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. We ship most products same or next business day to ensure we meet your delivery deadline.
The GiroDisc replacement rotor system is a direct rotor disc replacement for the Giro Disc 2-piece hat and rotor and no modifications are necessary.
The rotor and hat mount together through a floating mount system which utilizes 8-10 high strength alloy steel drive pins manufactured by GiroDisc in the USA to our own specifications and are cadmium plated for corrosion resistance. The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. The pins are secured by grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors.
The 2-piece GiroDisc design allows for rotor only replacement to minimize replacement costs and deliver outstanding performance and cooling.
Sold/Priced per pair.
