GiroDisc Racing Brakes & Technologies
D2-302 Girodisc Lamborghini Huracán STO Rear Replacement Rings
$1,563.00
Lamborghini Huracán STO Rear Replacement Rings
Maintain the world-class braking performance of your Lamborghini Huracán STO with Girodisc Rear Replacement Rings. These precision-engineered rings are designed to replace only the iron rotor surface, allowing you to reuse your Girodisc aluminum hats and restore peak braking efficiency with minimal expense. Each pair includes new hardware for a precise, secure installation.
Race-Bred Performance, Track-Ready Design
Machined in the USA from Girodisc’s proprietary cast iron, these replacement rings feature a curved vane design that actively channels cooling air through the rotor. The result is improved heat management, reduced fade, and consistent pedal feel during demanding conditions on both street and track.
Features
Sold as a pair and includes new replacement hardware
Direct replacement for Girodisc two-piece rear rotors
Reuse your existing Girodisc aluminum hats for cost savings
Proprietary U.S.-poured cast iron for superior strength and thermal control
Curved vane internal design for maximum cooling efficiency
Fully machined and assembled in the USA
Vehicle Fitment
2021–2025 Lamborghini Huracán STO (rear axle equipped with Girodisc two-piece rotors)
Lamborghini Huracán STO Rear Replacement Rings FAQs:
Do these fit OEM or factory two-piece rotors? No. These rings are specifically designed for Girodisc two-piece rotor systems and will not fit OEM or other aftermarket rotor assemblies.
What’s included in the box? Two replacement rings, new hardware, and detailed installation instructions. Your Girodisc aluminum hats are reused.
When should I replace my Girodisc rings? Replace when the rotors reach minimum thickness or if you notice heat checking, cracks, or excessive wear.
Do I need to replace both sides at the same time? Yes. Always replace rings in pairs to maintain balanced braking and even wear.
Can I install these myself? Installation can be done by experienced DIYers, but Girodisc recommends professional installation to ensure correct torque and safety.
Do these rings come balanced? Yes. Girodisc replacement rings are pre-balanced to factory specifications for vibration-free performance.
Please note: Girodisc replacement rings are designed for use only with Girodisc hats unless otherwise specified.
GiroDisc Racing Brakes & Technologies
A2-302 Girodisc Lamborghini Huracán STO Rear Iron Rotor Conversion
$2,834.00
A2-302 Girodisc Lamborghini Huracán STO Rear Iron Rotor Conversion
These Girodisc A2-302 2-piece rotors directly replace the factory carbon-ceramic rears on the Huracán STO. They retain the OEM calipers; pad shape is unchanged, but use an iron-appropriate compound.
Vehicle Fitment
2021+ Lamborghini Huracán STO (rear, CCB-equipped)
Curved-Vane Cooling
High-carbon iron rings with 48 curved vanes act as a centrifugal pump to move cooling air through the disc. Spring-preloaded hardware allows thermal growth without rattle.
Girodisc A2-302 Features
Direct CCB-to-iron conversion; OEM calipers retained
2-piece floating construction reduces unsprung/rotational mass
Reusable 6061-T6 aluminum hats; cadmium-plated pins
Manufactured and assembled in Bellingham, WA
Sold/priced per pair
FAQs
Which pads do I need? Same rear pad shape as OEM, but choose an iron-rotor compound.
Minimum thickness? Replace rear rings at 26 mm or sooner if a crack reaches the edge.
Any changes to parking brake? No — dimensions maintain OEM parking brake function.
Related Products
D2-302 Girodisc Lamborghini Huracán STO Rear Replacement Rings
A1-302 Girodisc Lamborghini Huracán STO Front Iron Rotor Conversion
D1-302 Girodisc Lamborghini Huracán STO Front Replacement Rings
GiroDisc Racing Brakes & Technologies
D1-302 Girodisc Lamborghini Huracán STO Front Replacement Rings
$1,563.00
Lamborghini Huracán STO Front Replacement Rings
Bring your Lamborghini Huracán STO’s braking system back to peak performance with Girodisc Front Replacement Rings. Designed as a direct replacement for the iron rotor surfaces on your existing Girodisc two-piece rotors, these rings allow you to retain your aluminum hats—saving cost, reducing downtime, and maintaining the precision balance your STO deserves. Each set includes new hardware for a perfect fit.
Motorsport-Grade Engineering
Every Girodisc ring is crafted in the USA from proprietary cast iron and precision machined for perfect balance and thermal stability. The curved vane design is developed through motorsport testing to act as a centrifugal air pump, pulling cool air through the rotor for consistent heat management and fade-free braking under extreme conditions.
Features
Sold as a pair and includes new replacement hardware
Direct replacement for Girodisc two-piece front rotors
Reuse your Girodisc aluminum hats to minimize cost
Made from proprietary U.S.-poured cast iron for strength and longevity
Curved vane design enhances cooling and reduces heat soak
Fully machined, balanced, and finished in the USA
Vehicle Fitment
2021–2025 Lamborghini Huracán STO (front axle equipped with Girodisc two-piece rotors)
Lamborghini Huracán STO Front Replacement Rings FAQs:
Do these fit OEM two-piece rotors? No. These rings are designed exclusively for use with Girodisc two-piece rotor systems and will not fit OEM or other aftermarket hats.
What’s included in the box? Two front replacement rings, new hardware, and installation instructions. You’ll reuse your existing Girodisc aluminum hats.
When should I replace the rings? Replace when the rotors reach minimum thickness or if any cracking, heat checking, or deformation is visible.
Should I replace both sides at once? Yes. Always replace both front rings simultaneously for balanced performance and even wear.
Can I install these myself? Experienced installers can perform the swap, but Girodisc recommends professional installation for correct torque specs and safety.
Are the rings balanced? Yes. Girodisc rings are precisely balanced for smooth, vibration-free braking right out of the box.
Please note: Girodisc replacement rings are designed for use only with Girodisc hats unless specifically stated otherwise.
GiroDisc Racing Brakes & Technologies
A1-302 Girodisc Lamborghini Huracán STO Front Iron Rotor Conversion
$2,834.00
A1-302 Girodisc Lamborghini Huracán STO Front Iron Rotor Conversion
These Girodisc A1-302 2-piece rotors directly replace the factory carbon-ceramic front rotors on the Lamborghini Huracán STO. They reuse the OEM calipers and require the D1130 pad shape (iron-rotor friction compound recommended). Replacement rings later: D1-302.
Vehicle Fitment
2021+ Lamborghini Huracán STO (front, CCB-equipped)
High-Carbon Rings, 72 Curved Vanes
Proprietary high-carbon iron with 72 curved vanes acts as a centrifugal pump to pull cooling air through the disc. Floating hardware with spring preload controls thermal growth and keeps street noise low.
Features
Direct CCB-to-iron conversion; OEM calipers retained
2-piece floating design reduces unsprung/rotational mass
Reusable 6061-T6 aluminum hats; new hardware included
72-vane internal geometry for strong airflow
Manufactured and assembled in Bellingham, WA
Sold/priced per pair
A1-302 FAQs
Which pads do I use? D1130 pad shape in an iron-rotor compound.
Any coding or spacers? No coding or spacers required for STO; designed for OEM calipers.
Minimum thickness? Replace front rings at 32 mm or sooner if a crack reaches the edge.
Related Products
D1-302 Girodisc Lamborghini Huracán STO Front Replacement Rings
A2-302 Girodisc Lamborghini Huracán STO Rear Iron Rotor Conversion
D2-302 Girodisc Lamborghini Huracán STO Rear Replacement Rings
Cobalt Friction Technologies, Inc.
Cobalt D1417 Brake Pads
$703.00
Cobalt Brake Pads Porsche D1417 Racing Brake Pads (Rear) - 16mm
Cobalt D1417 Fits The Following Vehicles:
Make
Model
Build (Year)
Front
Rear
Porsche
991 3.4 Carrera [ceramic brake caliper with RBD cast iron disc ]
11 -19
X
Porsche
991 3.4 Carrera [ceramic brakes]
11 - 15
X
Porsche
991 3.8 Carrera S [ceramic brake caliper with RBD cast iron disc]
11 -19
X
Porsche
991 3.8 Carrera S [ceramic brakes]
11 - 15
X
Porsche
991 3.8 Carrera S / GTS [iron brakes]
11 - 15
X
Porsche
991.2 3.0 Carrera [ceramic brakes]
15 - 19
X
Porsche
991.2 3.0 Carrera S [ceramic brakes]
15 - 19
X
Porsche
991.2 3.0 Carrera S [iron brakes]
15 - 19
X
Porsche
991.2 3.0 Carrera GTS [iron brakes]
17 - 19
X
Porsche
992 3.0 Carrera [iron brakes]
20 -
X
Porsche
992 3.0 Carrera S [iron brakes]
20 -
X
Porsche
992 3.0 Carrera 4S [iron brakes]
20 -
X
Cobalt Friction Technologies, Inc. is a leading developer & manufacturer of friction compounds for high-performance and professional motorsport disc brake applications. With our industry-leading range of race-proven XR-Series Carbon-Ceramic materials, Cobalt has a solution to meet your most demanding performance requirements, while always exceeding your expectations with superior technical and race engineering support.
PASSION The heart and soul of Cobalt Friction Technologies is fueled by our never-ending passion for motorsports. Our teams and drivers continually place greater demands on their equipment, and Cobalt Friction is there to satisfy these demands every step along the way.
PERFORMANCE Cobalt Friction's customer-driven research & development is what sets us apart from the competition. Our engineers do not design compounds based on lab results alone or to solely meet overly simplified, uni-dimensional "performance criteria". Rather, we continually "step outside the box" by working with and collecting feedback from our drivers and teams at all levels of professional and amateur motorsports, right there at the race track...week in and week out. When being the best and finishing first is the only option, Cobalt Friction accepts zero compromises, and so do our customers and teams.
TECHNICAL EXCELLENCE Cobalt-equipped drivers and teams are backed by race engineering support that is second to none. From the garages at the Rolex 24 at Daytona to the paddock at the SCCA Nationals, Cobalt Friction Technologies delivers the products, knowledge and power to win.
Cobalt Friction Technologies, Inc.
Cobalt Brake Pads D1644 Brake Pads (Front)
$796.00
Cobalt Brake Pads Porsche D1644 Racing Brake Pads (Front) - 16.6mm
Cobalt D1644 Fits The Following Vehicles:
Porsche 991 Carrera S (2012-19), Front w/ iron brakes
Porsche 991 Carrera 4S (2012-19), Front w/ iron brakes
Porsche 991 Carrera GTS (2015-19), Front w/ iron brakes
Cobalt Friction Technologies, Inc. is a leading developer & manufacturer of friction compounds for high-performance and professional motorsport disc brake applications. With our industry-leading range of race-proven XR-Series Carbon-Ceramic materials, Cobalt has a solution to meet your most demanding performance requirements, while always exceeding your expectations with superior technical and race engineering support.
PASSION The heart and soul of Cobalt Friction Technologies is fueled by our never-ending passion for motorsports. Our teams and drivers continually place greater demands on their equipment, and Cobalt Friction is there to satisfy these demands every step along the way.
PERFORMANCE Cobalt Friction's customer-driven research & development is what sets us apart from the competition. Our engineers do not design compounds based on lab results alone or to solely meet overly simplified, uni-dimensional "performance criteria". Rather, we continually "step outside the box" by working with and collecting feedback from our drivers and teams at all levels of professional and amateur motorsports, right there at the race track...week in and week out. When being the best and finishing first is the only option, Cobalt Friction accepts zero compromises, and so do our customers and teams.
TECHNICAL EXCELLENCE Cobalt-equipped drivers and teams are backed by race engineering support that is second to none. From the garages at the Rolex 24 at Daytona to the paddock at the SCCA Nationals, Cobalt Friction Technologies delivers the products, knowledge and power to win.
GiroDisc Racing Brakes & Technologies
D2-307 Girodisc Toyota GR Supra / BMW 345mm Rear Replacement Rings
$1,108.00
Toyota GR Supra, BMW 345mm Rear Replacement Rings
Bring your Toyota GR Supra or BMW back to peak braking performance with the Girodisc D2-307 Rear Replacement Rings. These high-performance iron rotor rings are engineered as direct replacements for your Girodisc two-piece rotors, delivering exceptional cooling, reduced weight, and race-proven reliability for street and track use alike.
When your Girodisc rotors reach their wear limit, these precision-machined rings let you refresh your braking system without buying new hats. Each ring is crafted from Girodisc’s proprietary U.S.-poured high-carbon cast iron, designed for extreme heat resistance and consistent braking under load. Whether you’re attacking corners on the track or driving hard on the street, Girodisc ensures your braking stays sharp, stable, and fade-free.
Features and Benefits
Direct replacements for Girodisc 345mm two-piece rear rotors
Machined from proprietary high-carbon cast iron for superior durability
48 curved directional vanes optimize airflow and heat dissipation
Lightweight design minimizes unsprung and rotational mass
Includes all new drive pins, bolts, and washers for installation
Fully machined, balanced, and assembled in the USA
Vehicle Fitment
2020+ Toyota GR Supra (A90 / A91)
2019+ BMW Z4 M40i
BMW G29 Platform (B58 engine)
These rings are designed exclusively for Girodisc aluminum hats and will not fit OEM or other aftermarket rotor hats.
Why Choose Girodisc
Girodisc brake systems are the benchmark for performance and reliability in motorsport-inspired braking. The D2-307 replacement rings allow you to maintain top-tier braking performance at a fraction of the cost of full rotor replacement. Every Girodisc component is precision engineered, race-tested, and built to handle extreme thermal stress with consistent, confident braking lap after lap.
FAQs
Do these include the aluminum hats?No. The D2-307 kit includes only the iron rotor rings and a new hardware kit. Your existing Girodisc hats are reused.
Can these be used with factory rotors?No. Girodisc replacement rings are designed exclusively for Girodisc two-piece rotors and will not bolt to OEM or other aftermarket hats.
Are these rotors directional?Yes. Each rotor ring features curved internal vanes and must be installed on the correct side for optimal airflow and cooling efficiency.
What comes in the box?A pair of 345mm rear rotor rings (left and right) plus all new drive pins, bolts, and washers.
Ready to Upgrade?
When it’s time to restore the full stopping power of your Toyota GR Supra or BMW Z4, the Girodisc D2-307 Rear Replacement Rings deliver uncompromising quality, cooling performance, and long-term durability. Order your set today from Competition Motorsport and keep your braking performance at its absolute best.
GiroDisc Racing Brakes & Technologies
D1-307 Girodisc Front Replacement Rotor Rings
$1,250.00
Toyota GR Supra, BMW 348mm Front Replacement Rings
Restore your braking performance with the Girodisc D1-307 Front Replacement Rings, designed for the Toyota GR Supra and BMW Z4 M40i. These precision-engineered 348mm iron rotor rings are direct replacements for your existing Girodisc two-piece rotors, delivering the same championship-level performance, reduced unsprung weight, and thermal stability that make Girodisc the gold standard for performance braking.
Manufactured from Girodisc’s proprietary high-carbon cast iron alloy and machined in the USA, these rotors are built to handle extreme braking forces and high temperatures without fade. If your original Girodisc rotors have reached their wear limit, these replacement rings let you renew your braking setup while reusing your original Girodisc aluminum hats — saving cost without sacrificing quality.
Features and Benefits
Direct replacements for Girodisc 348mm front two-piece rotors
Crafted from proprietary U.S.-poured high-carbon cast iron
48 curved directional vanes maximize airflow and cooling
Lightweight two-piece design reduces unsprung mass
Includes all new hardware: drive pins, bolts, and washers
Engineered, machined, and balanced entirely in the USA
Vehicle Fitment
2020+ Toyota GR Supra (A90 / A91)
2019+ BMW Z4 M40i
BMW G29 Platform (B58 engine)
These rotor rings are designed exclusively for Girodisc aluminum hats and are not compatible with OEM or other aftermarket hat assemblies.
Why Choose Girodisc
Girodisc performance rotors are trusted by track enthusiasts and professional racers for their ability to handle high thermal loads while maintaining consistent braking feel. The D1-307 front replacement rings deliver the same performance and cooling benefits as a brand-new set — for a fraction of the price. Each ring is optimized for even heat distribution and minimal warping, giving you confident braking under pressure lap after lap.
FAQs
Do these include the aluminum hats?No. The D1-307 kit includes only the iron rotor rings and a new hardware kit. Your existing Girodisc hats are reused.
Are these compatible with factory rotors?No. Girodisc rings are engineered exclusively for use with Girodisc hats and cannot be mounted to OEM or other aftermarket assemblies.
Are the rotors directional?Yes. Each rotor features curved internal vanes that must be installed on the correct side for proper cooling and airflow direction.
What’s included?Two 348mm front rotor rings (left and right) and a full hardware kit with drive pins, bolts, and washers.
Ready to Upgrade?
When it’s time to refresh your braking system, the Girodisc D1-307 Front Replacement Rings deliver the unmatched cooling, strength, and consistency that define Girodisc. Perfect for both daily driving and track-day abuse, they’ll keep your Toyota GR Supra or BMW Z4 M40i stopping with confidence. Order your set today from Competition Motorsport and get back to peak performance.
GiroDisc Racing Brakes & Technologies
D2-123DS Girodisc Mercedes 360mm Rear Replacement Rings (Dimpled & Slotted)
$1,392.00
Girodisc Mercedes Rear Replacement Rings (Dimpled & Slotted)
Upgrade your Mercedes AMG’s braking performance with Girodisc D2-123DS 360mm dimpled and slotted rear replacement rings. Designed as direct-fit replacements for Girodisc two-piece rear rotors, these rings bolt to your existing Girodisc aluminum hats using the included floating hardware kit. The dimpled and slotted design enhances bite, clears debris, and helps maintain consistent braking under extreme conditions.
Vehicle Fitment
Compatible with:• Mercedes-Benz C63 AMG (W204 / W205 chassis)• Mercedes-Benz E63 AMG (W212 / W213 chassis)• Mercedes-Benz CLS63 AMG (C218 chassis)• Mercedes-Benz S63 AMG (W222 chassis, steel rotor applications)Note: For vehicles equipped with Girodisc 360mm two-piece rear rotors. Not for OEM or carbon-ceramic systems.
Features
• Sold as a left/right pair and includes new floating hardware kit• Dimpled and slotted surface increases pad bite and gas evacuation• CNC-machined from high-carbon cast iron for superior heat control• Curved directional vanes provide maximum cooling under load• Maintains OEM brake bias and ABS function• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 360mm• Position: Rear• Material: High-carbon cast iron• Surface: Dimpled and slotted• Mount type: Floating two-piece system• Includes: Two rings and full hardware kit• Sold/priced per pair• MSRP: $980.00
Girodisc D2-123DS Replacement Ring FAQs
Will these fit OEM Mercedes rotors? No. These are engineered for Girodisc two-piece rotor systems and will not fit factory or carbon-ceramic setups.
What’s the advantage of the dimpled and slotted design? It improves initial pad bite, helps vent gases, and maintains a cleaner braking surface for consistent stopping power.
Are both sides included? Yes. Each D2-123DS kit includes left and right replacement rings plus a complete hardware kit.
Do I need to replace the hardware? Yes. Each kit includes new floating hardware that must be used for proper installation and long-term reliability.
Enhance your AMG’s braking response with Girodisc D2-123DS 360mm rear replacement rings — the ideal blend of precision, durability, and cooling performance for the street or track.
GiroDisc Racing Brakes & Technologies
D1-282 Girodisc BMW G8X 380mm Front Replacement Rings
$1,250.00
D1-282 Girodisc BMW G8X Front Replacement Rings
Rings only, sold as a pair with new hardware. Reuse your existing Girodisc aluminum hats. These rings are engineered for Girodisc hats only and will not fit OE or other aftermarket hats.
Vehicle Fitment
BMW G87 M2 – Front (for A1-282 kits)
BMW G80/G81 M3 – Front (for A1-282 kits)
BMW G82/G83 M4 – Front (for A1-282 kits)
Quick Refresh, Track-Ready
High-carbon iron rings with 72 curved vanes move air efficiently. New drive pins, clips, and Belleville washers restore proper float and clamp force for quiet street manners and durability under heat.
Features
Replacement rings only; includes new hardware
Direct fit for Girodisc A1-282 front rotor kits
High-carbon iron; USA-poured and machined
72-vane internal geometry for cooling airflow
Sold/priced per pair
D1-282 FAQs
Minimum thickness? Replace at 34 mm or if any crack reaches the outer edge.
Re-use hardware? No — install the included new hardware and torque per instructions.
Re-bed pads? Yes — perform a standard bedding procedure after ring replacement.
GiroDisc Racing Brakes & Technologies
D2-282 Girodisc BMW G8X 370mm Rear Replacement Rings
$1,193.00
D2-282 Girodisc 370mm Rear Replacement Rings
Rings only, sold as a pair with new hardware. Reuse your existing Girodisc aluminum hats. These rings are engineered for Girodisc hats only and will not fit OE or other aftermarket hats.
Vehicle Fitment
BMW G87 M2 – Rear (for A2-282 kits)
BMW G80/G81 M3 – Rear (for A2-282 kits)
BMW G82/G83 M4 – Rear (for A2-282 kits)
Easy Service, Consistent Performance
High-carbon iron rings with 48 curved vanes provide reliable cooling and durability. New pins, clips, and Belleville washers restore proper float and clamping force.
Features
Replacement rings only; includes hardware
Direct fit for Girodisc A2-282 rear rotor kits
High-carbon iron; USA-poured and machined
48-vane internal design for airflow
Sold/priced per pair
D2-282 FAQs
Minimum thickness? Replace at 22 mm or sooner if a crack reaches the outer edge.
Do I reuse hardware? No — always install the supplied new hardware and torque per instructions.
Do I need to re-bed pads? Yes — re-bed after ring installation to stabilize the friction layer.
GiroDisc Racing Brakes & Technologies
D2-322 Girodisc BMW G8X Iron Conversion Rear Replacement Rings
$1,250.00
BMW G8X Iron Conversion Rear Replacement Rings
Renew your braking performance with the Girodisc D2-322 Rear Replacement Rings, designed specifically for the Girodisc A2-322 Iron Conversion rotor system on the BMW G8X platform. Whether your M3 or M4 originally came with carbon ceramics or standard iron rotors, these rings let you restore peak performance without replacing your entire rotor assembly.
Each set is precision-machined from Girodisc’s proprietary U.S.-poured high-carbon cast iron, delivering the same championship-level performance and cooling efficiency as your original Girodisc rotors. Built to withstand extreme heat cycles and track abuse, the D2-322 replacement rings bring your braking system back to life with fresh hardware and exact OEM fitment.
Features and Benefits
Direct replacement rings for Girodisc Iron Conversion Rear Rotors (A2-322)
Includes all new attachment hardware – pins, bolts, and washers
Machined from proprietary high-carbon cast iron for superior heat capacity and durability
48 curved directional vanes maximize airflow for efficient cooling
Lightweight two-piece rotor design reduces unsprung and rotational mass
Fully machined, balanced, and assembled in the USA
Vehicle Fitment
BMW G80 M3 (2021+)
BMW G82 M4 (2021+)
BMW G83 M4 Convertible (2021+)
These replacement rings are designed exclusively for Girodisc Iron Conversion kits (part number A2-322) and will not fit OEM or other aftermarket rotor hats, including factory two-piece assemblies.
Why Choose Girodisc
Girodisc has earned its reputation as the leader in performance braking systems, offering precision-engineered components built for the demands of modern sports cars. Each rotor ring is designed to provide consistent braking, optimized cooling, and maximum longevity. The D2-322 replacement set lets you keep your original Girodisc hats while restoring the braking response and confidence you expect from your G8X M car.
FAQs
Do these include the aluminum hats?No. The D2-322 kit includes only the iron rotor rings and new hardware. You will reuse your existing Girodisc hats from the A2-322 Iron Conversion kit.
Are these compatible with OEM BMW carbon ceramic or two-piece rotors?No. These are only compatible with Girodisc Iron Conversion rotor hats (A2-322) and cannot be used with OEM or other aftermarket assemblies.
Are they directional?Yes. Each rotor ring has curved internal vanes designed for optimal airflow and cooling when installed on the correct side.
What’s included in the box?A pair of rear replacement rings (left and right) and a complete hardware kit with new drive pins, bolts, and washers.
Ready to Upgrade?
If your Girodisc iron conversion rotors have reached their wear limit, the D2-322 Rear Replacement Rings will bring your BMW M3 or M4 braking system back to its peak. Experience the legendary cooling and stopping performance that make Girodisc the go-to choice for track and street enthusiasts alike. Order your set today from Competition Motorsport and get back to maximum braking confidence.
Cobalt Friction Technologies, Inc.
Cobalt Racing Brake Pads BGT6D65 (Front)
$880.00
Cobalt Front Brake Pads
Cobalt Friction Technologies, Inc. is a leading developer & manufacturer of friction compounds for high-performance and professional motorsport disc brake applications. With our industry-leading range of race-proven XR-Series Carbon-Ceramic materials, Cobalt has a solution to meet your most demanding performance requirements, while always exceeding your expectations with superior technical and race engineering support.
PASSION
The heart and soul of Cobalt Friction Technologies is fueled by our never-ending passion for motorsports. Our teams and drivers continually place greater demands on their equipment, and Cobalt Friction is there to satisfy these demands every step along the way.
PERFORMANCE
Cobalt Friction's customer-driven research & development is what sets us apart from the competition. Our engineers do not design compounds based on lab results alone or to solely meet overly simplified, uni-dimensional "performance criteria". Rather, we continually "step outside the box" by working with and collecting feedback from our drivers and teams at all levels of professional and amateur motorsports, right there at the race track...week in and week out. When being the best and finishing first is the only option, Cobalt Friction accepts zero compromises, and so do our customers and teams.
TECHNICAL EXCELLENCE
Cobalt-equipped drivers and teams are backed by race engineering support that is second to none. From the garages at the Rolex 24 at Daytona to the paddock at the SCCA Nationals, Cobalt Friction Technologies delivers the products, knowledge and power to win.
Fits the Following Cars (Front):
Camaro SS w/ 6-Piston Brembo (2016-2019)
Camaro ZL1 (2012-2015)
Corvette C8 Z06 Iron Rotor (2022+)
Corvette C7 Z06
Corvette C7 Z07 w/ Iron Rotors Conversion
Dodge Viper ACR w/ Iron Rotors Conversion (2014-2017)
Mercedes C63 AMG Black Series
Ferodo Racing
Ferodo FCP4955 Porsche Front Brake Pads
from $843.00
Ferodo 11 FCP4955 Porsche Front Brake Pads
Designed for use with iron brake rotors only. Not for use with carbon-ceramic rotors.
Ferodo 11 FCP4955 Front Brake Pad Fitment:
Porsche 991 S/4S/GTS (2012-2019)
Porsche 981 Boxster Spyder (2016-2020)
Ferodo Compound DS3.12
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 Compound DS1.11
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 Compound DS2500
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 11 FCP4955 Comparison Chart
Out of all the pad compounds we've ever tested, from all manufacturers, the Ferodo DS3.12 shows the flattest torque curve across the broadest temperature range. That means on every turn, on every track you drive, on every lap, your brake pedal is going to feel almost exactly the same, providing tremendous consistency and repeatability. The DS3.12 has a higher mu (µ) than Ferodo's other compounds, so not as much pedal pressure is required to initiate the desired response. It is also un-fadable, showing no drop in performance at any temperature your brakes will ever see.
Ferodo 11 FCP4955 Coefficient of Friction (Mu) Comparison Chart
In dyno testing, the Ferodo DS3.12 has shown superior wear rates to the other Ferodo compounds, while remaining kind to brake rotors. We believe the Ferodo DS3.12 will become the gold standard by which other race compounds will be judged.
Ferodo 11 FCP4955 Operating Temperature Comparison Chart
GiroDisc Racing Brakes & Technologies
D2-318 Girodisc Cadillac CT4-V Blackwing Rear Replacement Rings
$1,250.00
D2-318 Girodisc Cadillac CT4-V Blackwing Rear Replacement Rings
D2-318 rear replacement rings are sold in pairs with new hardware. Reuse your existing Girodisc aluminum hats. Rings are designed exclusively for Girodisc hats and will not fit OE or other aftermarket hats.
D2-318 Vehicle Fitment
Cadillac CT4-V Blackwing – Rear (for A2-318 kits)
Cost-Effective Service
High-carbon iron rings with curved vanes provide consistent performance under repeated braking. New drive pins, clips, and Belleville washers restore proper float and clamping force.
Features
Replacement rings only; includes hardware
Direct fit for Girodisc A2-318 rear rotor kits
High-carbon iron; USA-poured and machined
Curved vane internal design for cooling airflow
Sold/priced per pair
D2-318 Girodisc Cadillac Rear Replacement Rings FAQs
What’s the recommended minimum thickness? Replace rear rings at 26 mm or sooner if any crack reaches the outer edge.
Do I need to re-bed pads? Yes — re-bed after ring installation for optimal friction transfer.
Can I mix these with OE front rotors? Yes, but best results come from matching front and rear Girodisc assemblies.
Hardware reuse? Use the supplied new hardware; do not reuse worn pins/springs.
GiroDisc Racing Brakes & Technologies
A1-309 Girodisc Audi with Brembo 18Z Front Rotors
$1,413.00
Girodisc Audi with Brembo 18Z Front Rotors
These Girodisc A1-309 two-piece front rotors are purpose-built for Audi models using the Brembo “18Z” 6-piston caliper (Cayenne/Q7/Touareg sourced). They bolt to the car and work with 18Z calipers while reducing unsprung weight and improving cooling versus one-piece rotors.
Vehicle Fitment
Audi S4 (B5) – Front, with Brembo 18Z caliper conversion
Audi A6 (C5) 2.7T – Front, with Brembo 18Z caliper conversion
Audi Allroad (C5) 2.7T – Front, with Brembo 18Z caliper conversion
Fitment note: Minor clearancing on the bottom of the upright is required on C5 chassis per Girodisc instructions. Will not fit C5 A6 4.2 V8, RS6, or Allroad 4.2 V8.
Lightweight, High-Flow Design
High-carbon iron rings with curved internal vanes act as a centrifugal pump to draw cooling air through the disc. Reusable 6061-T6 aluminum hats and cadmium-plated drive pins control thermal growth while keeping street noise in check.
Features
Direct fit for 18Z caliper swaps on B5 S4 / C5 2.7T (A6, Allroad)
Two-piece floating construction reduces unsprung weight
High-carbon rings, curved vanes for efficient cooling
Reusable aluminum hats; new hardware included
Manufactured and assembled in Bellingham, WA
Sold/priced per pair
A1-309 FAQs
Will these fit C5 4.2 V8 or RS6? No. These are for B5 S4 and C5 2.7T cars only when running 18Z calipers.
Is any modification needed? On C5 chassis, Girodisc specifies minor upright clearancing; a guide/video is provided.
Do I need different brake lines or brackets? No additional lines or brackets are required for standard 18Z swap geometry.
What rings do I use later? Use D1-309 front replacement rings.
Related Products
D1-309 Girodisc Audi with Brembo 18Z Front Replacement Rings
