GiroDisc Racing Brakes & Technologies
A1-007 Girodisc Subaru WRX STI (2004–2017) Front Rotors
$950.00
Girodisc Subaru WRX STI (2004–2017) Front Rotors
The Girodisc system is a direct replacement for the OEM front rotors on the 2004–2017 Subaru WRX STI. Weighing only 16.6 lbs per rotor, these lightweight 2-piece assemblies dramatically reduce unsprung and rotational mass, improving steering response, acceleration, and suspension control. Designed for both high-performance street use and demanding track conditions, the Girodisc system maintains factory brake bias and ABS functionality while delivering improved cooling and endurance.
Precision Engineering
The rotor rings are machined from Girodisc’s proprietary high-carbon iron alloy, poured and processed entirely in-house in Bellingham, Washington. This advanced metallurgy ensures superior thermal stability and wear resistance under extreme braking conditions. The 30 curved vanes act as centrifugal pumps, drawing air through the hub to enhance rotor cooling during high-load track sessions.
Features
Direct bolt-on replacement for OEM front rotors – no modifications required
Lightweight two-piece floating design reduces unsprung weight
Proprietary high-carbon iron rings ensure consistent performance and long life
6061-T6 aluminum hat, hard anodized for durability
Floating hardware with spring clips and Belleville washers for quiet operation
Curved vane internal design maximizes air flow and cooling
Fully rebuildable – replace iron rings while reusing the hats and hardware
Manufactured entirely in the USA using domestically sourced materials
Vehicle Fitment
Subaru WRX STI (2004–2017)
Technical Specifications
Part Number: A1-007
Position: Front
Diameter: 326mm
Thickness: 30mm
Weight: 16.6 lbs per rotor
Rotor Type: Two-piece floating
Hat Material: 6061-T6 aluminum (black anodized)
Disc Material: Proprietary high-carbon cast iron
Vane Design: 30 curved directional vanes
Drive Pins: High-strength steel alloy, cadmium-plated
Sold/Price: Per pair
FAQs for Girodisc A1-007
Are these a direct fit for my Subaru WRX STI? Yes. They bolt directly onto all 2004–2017 Subaru WRX STI models with factory calipers and require no additional hardware.
Can I reuse the aluminum hats? Yes. The Girodisc system is fully rebuildable—only the iron rotor rings need to be replaced when worn.
Will they make noise on the street? No. The included Belleville washers and spring clips eliminate the rattles commonly associated with floating rotors.
Are these suitable for track days? Absolutely. Girodisc rotors are engineered for heavy braking, offering superior heat resistance, minimal fade, and consistent performance on the track.
Upgrade your Subaru WRX STI with Girodisc’s precision-engineered floating front rotors—built to deliver race-proven performance, reduced weight, and uncompromising stopping power.
GiroDisc Racing Brakes & Technologies
A2-007 Girodisc Subaru WRX STI ('04–07) Rear Rotors
$950.00
Girodisc Subaru WRX STI ('04–07) Rear Rotors
Upgrade your 2004–2007 Subaru WRX STI with Girodisc lightweight two-piece rear rotors engineered for precision, durability, and improved heat management. These rotors deliver faster response, reduced fade, and sharper braking feel while maintaining factory balance and ABS performance. Perfect for both daily driving and high-performance track use.
Vehicle Fitment
Compatible with:• Subaru WRX STI (2004–2007)• Subaru WRX STI Limited (2007)Direct OEM replacement – bolts directly to factory hubs and calipers. Note: Minor pad modification may be required for proper clearance (see below).
Track-Tested, Street-Ready Braking Performance
The Girodisc system replaces the OEM one-piece rotors with a two-piece floating design to reduce unsprung mass and improve heat dissipation. Each rotor hat is CNC-machined from 6061-T6 aircraft-grade aluminum and hard-anodized for strength and corrosion resistance. The proprietary cast-iron rings are made and machined in the USA, featuring curved directional vanes that draw cooling air through the disc for maximum thermal efficiency. The result is consistent, fade-free braking performance under the most demanding conditions.
Features
• Direct OEM replacement for 2004–2007 Subaru WRX STI rear rotors• Lightweight two-piece floating rotor assembly• CNC-machined 6061-T6 aluminum hats with anodized finish• Proprietary cast-iron friction rings with curved directional vanes• Cadmium-plated drive pins resist corrosion and fatigue• Anti-noise spring washers eliminate rattle and vibration• Retains OEM parking brake compatibility• Approximately 7 lbs lighter per rotor than stock• Fully rebuildable – replace only iron rings when worn• Sold/priced per pair
Installation Note
The OEM pads and some aftermarket brake pads require slight modification to fit the Girodisc hardware layout while maintaining OEM parking brake operation. This involves lightly grinding the backing plate of the pad to match the pad material arc. Girodisc includes instructions, and all pads purchased directly from Girodisc come pre-modified for a plug-and-play fit.
Girodisc A2-007 Rear Rotor FAQs:
Do these rotors fit directly on the 2004–2007 STI? Yes. The A2-007 rotors are designed specifically for the GD-chassis WRX STI and bolt directly to the factory hub and calipers.
Why is pad modification needed? Girodisc’s floating two-piece design changes the hardware arrangement slightly, requiring a small pad clearance adjustment to ensure proper fit and full parking brake functionality.
How much lighter are these than stock rotors? Approximately 7 lbs per corner—11 lbs each compared to roughly 18 lbs stock—reducing unsprung weight and improving handling response.
Are these suitable for aggressive driving or track use? Absolutely. The Girodisc design offers superior heat control, reduced fade, and consistent braking during sustained high-temperature operation.
Experience precise braking control and lasting performance with Girodisc rear rotors for your Subaru WRX STI—engineered for the driver who demands performance without compromise.
GiroDisc Racing Brakes & Technologies
A2-095 Girodisc Subaru WRX STI ('08–'17) Rear Rotors
$950.00
Girodisc Subaru WRX STI Rear Rotors
Designed for enthusiasts who demand faster response and greater stopping consistency, Girodisc rear rotors for the 2008–2017 Subaru WRX STI combine lightweight performance with race-proven cooling technology. These two-piece floating rotors deliver improved balance, heat control, and durability—ideal for both spirited street driving and track days.
Vehicle Fitment
Subaru WRX STI (2008–2017)Compatible with OEM Brembo rear calipers and factory parking brake system.
Lightweight, High-Performance Design
The Girodisc system bolts directly to factory hubs. Some OEM and aftermarket brake pads require minor modification to clear the hardware while retaining the stock parking brake. This simple adjustment involves slightly grinding the backing plate to match the pad’s arc, and full instructions are included. Pads supplied by Girodisc for this application are already CNC-modified for a direct fit.
Each rotor assembly combines a 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction ring, cast and machined in the USA. The curved internal vane structure acts as a centrifugal pump, pulling air through the rotor to maximize cooling and reduce fade. At only 11 lbs each versus 18 lbs stock, these rotors significantly reduce unsprung and rotational weight for sharper handling and quicker acceleration.
Features
• Direct replacement for OEM rotors – minor pad modification may be required• 6061-T6 billet aluminum hats, hard-anodized for corrosion resistance• Proprietary cast-iron friction rings cast and machined in the USA• Floating mount system with cadmium-plated steel drive pins• Anti-noise spring washers prevent rattle while maintaining float• Curved vane design enhances airflow and cooling• 11 lbs per rotor vs. 18 lbs OEM – reduces unsprung mass by 7 lbs each• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-095 Rear Rotor FAQs:
Do these rotors require modification to install? The rotors themselves bolt directly on. However, some brake pads require minor backing plate modification to clear the hardware. Full instructions are provided, and Girodisc pads are pre-machined for plug-and-play use.
Will these rotors retain my factory parking brake? Yes. Girodisc specifically designed this setup to keep full functionality of the OEM parking brake system.
How much weight savings can I expect? Each Girodisc rotor is approximately 7 lbs lighter than stock, reducing rotational inertia and improving suspension response.
Are these suitable for track days or street use? Absolutely. These rotors are engineered for both daily driving and high-performance conditions, providing better cooling and fade resistance under load.
Upgrade your Subaru WRX STI with Girodisc rear rotors for lighter, cooler, and more consistent braking performance—precision-built to handle everything from mountain roads to race circuits.
GiroDisc Racing Brakes & Technologies
D2-007 Girodisc Subaru WRX STI (2004–2017) Rear Replacement Rings
$630.00
Girodisc Subaru WRX STI Rear Rings
Restore the braking precision of your Subaru WRX STI with Girodisc D2-007 316mm rear replacement rings. These precision-machined rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Replace only the wear surface to maintain peak braking performance and save on long-term maintenance costs while preserving your car’s factory brake bias.
Vehicle Fitment
Compatible with:• Subaru WRX STI (2004–2017, all trims)• Subaru Impreza WRX STI (GD, GR, GV, VA chassis)Note: For use with Girodisc 316mm two-piece rear rotor systems only. Not compatible with OEM one-piece or carbon-ceramic rotors.
Features
• Sold as a left/right pair with full floating hardware kit• Direct replacements for Girodisc 316mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Directional curved vanes improve airflow and reduce fade• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 316mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair• MSRP: $630.00
Girodisc D2-007 Subaru WRX STI Rear Replacement Ring FAQs
Do these fit factory WRX rotors? No. These are designed exclusively for Girodisc two-piece rear rotor systems and will not fit OEM one-piece rotors.
Will they clear OEM Brembo calipers? Yes. They are built to factory dimensions and work perfectly with the stock STI Brembo rear calipers.
Are these recommended for track use? Absolutely. Girodisc’s floating design and high-carbon alloy manage heat efficiently, preventing warping and fade during extended track sessions.
How often should I replace the rings? Replace when the rotor reaches minimum thickness or shows visible cracking or heat checking from repeated heat cycles.
Upgrade your Subaru WRX STI with Girodisc D2-007 316mm rear replacement rings — engineered for lightweight performance, superior cooling, and consistent braking response from canyon runs to track days.
Performance Friction Corporation
PFC Brake Pads 7838.08.17.44 (Front)
$371.37
PFC Brake Pads 7838.08.17.44
Fits the Following Cars:
Make
Model
Build (Years)
Front
Rear
McLaren
650S
2014 - 17
X
McLaren
675LT
2015 - 17
X
McLaren
MP4-12C
2011 - 14
X
PFC 08 Compound
This is one of PFC's most popular compounds, coming to fame in Endurance sports car and GT racing due to its exceptional performance when smooth initial bite is a must. PFC 08 has a slight friction rise with temperature, with excellent release and modulation characteristics.
Despite its considerable performance, PFC 08 has the lowest wear rate of all PFC compounds. PFC08 can easily match the wear characteristics of competitors' friction materials, but with much higher bite and more consistent performance across a broad temperature range.
Performance Friction Corporation
PFC Brake Pads 4362.08.19.44 (Front)
$600.94
PFC Brake Pads 4362.08.19.44
Fits the Following Cars:
Make
Model
Sub-model
Build (Year)
Notes
Front
Rear
Ferrari
458 Challenge
Brembo system
Race GT 19mm
X
Nissan
Skyline
GT-R (R35)
2008-11
X
Nissan
Skyline
GT-R (R35)
2011 +
X
PFC 08 Compound
This is one of PFC's most popular compounds, coming to fame in Endurance sports car and GT racing due to its exceptional performance when smooth initial bite is a must. PFC 08 has a slight friction rise with temperature, with excellent release and modulation characteristics.
Despite its considerable performance, PFC 08 has the lowest wear rate of all PFC compounds. PFC08 can easily match the wear characteristics of competitors' friction materials, but with much higher bite and more consistent performance across a broad temperature range.
GiroDisc Racing Brakes & Technologies
A2-017 Girodisc Mercedes W204 C63 Rear Rotors
$1,400.00
Girodisc Mercedes W204 C63 Rear Rotors
Enhance the braking performance of your Mercedes W204 C63 AMG with Girodisc lightweight two-piece rear rotors. These precision-engineered rotors offer superior cooling, faster heat recovery, and significant weight reduction over stock one-piece units. The result is sharper pedal feel, improved response, and consistent stopping power for both spirited street use and track sessions.
Vehicle Fitment
Compatible with the following Mercedes-Benz AMG models:• C63 AMG (W204, 2008–2015)• C63 AMG Coupe (W204, 2012–2015)Direct OEM replacement – bolts directly to factory calipers with no modifications required.
Engineered for Performance and Longevity
The Girodisc system replaces the factory one-piece rotor with a floating two-piece design that greatly improves cooling and reduces unsprung mass. Each rotor hat is CNC-machined from 6061-T6 aircraft-grade aluminum and hard-anodized for strength and corrosion resistance. The proprietary cast-iron rings are made and machined entirely in the USA, utilizing curved directional vanes that act as a centrifugal pump to pull cooling air through the disc and minimize fade under extreme temperatures.
Features
• Direct OEM replacement for Mercedes W204 C63 AMG• Lightweight two-piece floating construction• CNC-machined 6061-T6 aluminum hats• Proprietary cast-iron friction rings with curved vane internal cooling• Cadmium-plated drive pins for long-term corrosion resistance• Anti-noise spring washers eliminate rattle and vibration• Maintains factory brake bias and ABS operation• Fully rebuildable – replace only the iron rings when needed• Made in the USA• Sold/priced per pair
Girodisc A2-017 Rear Rotor FAQs:
Do these fit the factory calipers? Yes. The A2-017 Girodisc rotors are designed as a direct bolt-on replacement using the original calipers and hardware.
What’s the benefit of the smooth rotor surface? The non-slotted design offers quieter operation and maximizes pad life while still delivering excellent braking performance and heat control.
Do I need special brake pads? No. These rotors work perfectly with OEM pads or any high-performance aftermarket compound of your choice.
How much weight do these save over OEM rotors? The Girodisc two-piece design sheds several pounds per corner, reducing unsprung weight for better handling and responsiveness.
Improve stopping confidence and extend the life of your braking components with Girodisc Mercedes W204 C63 rear rotors—crafted for precision, performance, and reliability on every drive.
GiroDisc Racing Brakes & Technologies
A2-072 Girodisc Mercedes S55, CL55 Rear Rotors
$1,350.00
Girodisc Mercedes S55, CL55 Rear Rotors
Upgrade your Mercedes S55 or CL55 AMG with Girodisc’s precision-engineered rear rotors—crafted for lighter weight, improved cooling, and exceptional braking performance. Designed as a direct OEM replacement, these two-piece floating rotors deliver sharper pedal feel, reduced fade, and long-lasting durability without altering factory balance or ABS function.
Vehicle Fitment
Mercedes-Benz S55 AMG (W220)Mercedes-Benz CL55 AMG (C215)Compatible with OEM Brembo calipers and factory hardware.
Lightweight, High-Performance Design
The Girodisc system installs directly on your factory hubs with no modifications required. Each rotor combines a CNC-machined 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction ring, both manufactured and machined in the USA. The floating mount system allows for independent thermal expansion, reducing distortion and maintaining even pad contact under extreme braking. Internal curved vanes act as centrifugal pumps, drawing air through the disc for optimal heat dissipation and consistent performance lap after lap.
Features
• Direct OEM replacement – bolts to factory hubs• 6061-T6 billet aluminum hats with hard-anodized finish• Proprietary high-carbon cast-iron friction rings cast and machined in the USA• Floating mount system with cadmium-plated steel drive pins• Anti-noise spring washers eliminate rattle and maintain float• Curved vane design for efficient cooling and temperature control• Approx. 14.4 lbs vs. 22.5 lbs OEM – saves over 8 lbs per rotor• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-072 Rear Rotor FAQs:
Do these fit both S55 and CL55 AMG models? Yes. They are designed for direct OEM replacement on both models equipped with factory AMG braking systems.
What’s the performance advantage over OEM rotors? Girodisc rotors reduce unsprung and rotational mass by over 8 lbs per corner, improving braking consistency, suspension response, and acceleration.
Are these compatible with OEM pads? Absolutely. They can be used with factory pads or upgraded performance compounds for street or track driving.
Do they require any modification or adapters? No. These rotors bolt directly to your existing hubs and use all OEM hardware and calipers without alteration.
Enhance your AMG’s braking confidence and control with Girodisc rear rotors—engineered to deliver lighter, stronger, and more responsive performance on every drive.
GiroDisc Racing Brakes & Technologies
A1-072 Girodisc Mercedes S55, CL55 Front Rotors
$1,400.00
Mercedes S55, CL55 Front Rotors
Upgrade your Mercedes S55 or CL55 with Girodisc two-piece front rotors engineered for improved braking response, lighter unsprung weight, and consistent performance under heat. Designed as a direct-fit replacement for the factory rotors, they deliver exceptional balance between comfort and track-ready durability.
Vehicle Fitment
• 2001–2006 Mercedes S55 AMG (W220)• 2000–2006 Mercedes CL55 AMG (C215)
Lightweight, Precision-Balanced Performance
The Girodisc system bolts directly to factory calipers with no modifications needed. At just 23.6 lbs per rotor versus the 34.5 lb stock discs, the dramatic reduction in unsprung and rotational weight translates into sharper acceleration, improved suspension response, and enhanced pedal feel.
Key Features
• Direct bolt-on replacement – no modifications required • 6061-T6 aluminum rotor hats made in the USA • Proprietary high-carbon iron rings with curved vane cooling design • Floating mount system with anti-noise spring washers • Sold/priced per pair
Mercedes S55, CL55 Front Rotors FAQs:
Will these rotors fit my factory calipers? Yes, these are a direct replacement for the OE rotors and use your existing calipers without modification.
What benefits do Girodisc rotors offer over OEM? They shed over 10 pounds per rotor, improving suspension compliance and throttle response while enhancing cooling efficiency.
Are these rotors rebuildable? Absolutely. Once installed, only the cast iron rings need replacing when worn—saving long-term cost.
Do these rotors reduce brake fade? Yes, the curved vane design acts as a centrifugal pump, forcing cool air through the disc to dissipate heat more effectively under load.
Transform the braking dynamics of your Mercedes S55 or CL55 with Girodisc’s lightweight front rotors—engineered for superior heat management and precision braking feel, both on the road and the track.
GiroDisc Racing Brakes & Technologies
A2-123 Girodisc Mercedes SL65, SLS Rear Rotors
$1,450.00
Girodisc Mercedes SL65, SLS Rear Rotors
Precision-engineered for Mercedes-AMG’s most powerful grand tourers, these Girodisc rear rotors deliver lighter weight, improved cooling, and track-proven performance. Designed as a direct replacement for OEM components, they retain full factory compatibility while offering better pedal feedback and reduced fade under hard braking.
Vehicle Fitment
Mercedes-Benz SL65 AMG (R230 & R231)Mercedes-Benz SLS AMG (C197 & Roadster variants)Compatible with OEM Brembo calipers and hardware.
Lightweight Performance Upgrade
The Girodisc system bolts directly to the car—no modifications required. Each two-piece rotor features a CNC-machined 6061-T6 aluminum hat paired with Girodisc’s proprietary high-carbon cast-iron friction ring. The result is a lightweight, high-strength assembly that cuts unsprung mass for sharper handling and faster response. Internal curved vanes act as centrifugal pumps, forcing air through the disc to dissipate heat efficiently under repeated high-load braking.
Features
• Direct OEM replacement – no adapters or modifications required• 6061-T6 billet aluminum hats with hard-anodized finish• Proprietary cast-iron friction rings poured and machined in the USA• Floating mount system with 10 cadmium-plated drive pins• Anti-noise spring washers eliminate rattle while maintaining float• Curved vane internal design enhances airflow and cooling• Approximately 14.4 lbs vs. 22.5 lbs OEM – over 8 lbs lighter per rotor• Fully rebuildable—replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-123 Rear Rotor FAQs:
Are these rotors compatible with both SL65 and SLS AMG models? Yes. Girodisc designed this setup to fit both AMG platforms perfectly, using OEM Brembo calipers and hardware without modification.
What kind of performance improvement should I expect? You’ll notice a sharper pedal response, better heat control, and reduced fade during extended braking—all while shedding over 8 lbs of unsprung weight per rotor.
Can I use my existing pads with these rotors? Absolutely. These rotors are fully compatible with OEM pads or aftermarket performance compounds.
Are Girodisc rotors suitable for everyday driving? Yes. While engineered for motorsport performance, they maintain smooth, quiet operation and exceptional longevity on the street.
Experience true AMG performance with Girodisc’s lightweight rear rotors—precision-built to enhance braking power, balance, and control without sacrificing comfort.
GiroDisc Racing Brakes & Technologies
D2-034 Girodisc Lamborghini Gallardo (2004–2008) Rear Replacement Rings
$780.00
Girodisc Lamborghini Gallardo (2004–2008) 335mm Rear Replacement Rings
Renew the stopping power of your Lamborghini Gallardo with Girodisc D2-034 335mm rear replacement rings. These precision-engineered components are designed as direct replacements for Girodisc two-piece rotors, bolting to your existing Girodisc aluminum hats with the included floating hardware kit. Replace only the wear surface to maintain your lightweight, high-performance braking setup and reduce long-term service costs.
Vehicle Fitment
Compatible with:• Lamborghini Gallardo (2004–2008, rear)• Lamborghini Gallardo SE (2006, rear)• Lamborghini Gallardo Nera / Spyder (rear)Note: Designed exclusively for Girodisc 335mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic brake systems.
Features
• Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 335mm two-piece rear rotors• CNC-machined from proprietary high-carbon cast iron• Curved directional vanes maximize airflow and cooling efficiency• Maintains OEM brake balance and ABS performance• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 335mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and new hardware kit• Sold/priced per pair
Girodisc D2-034 Lamborghini Gallardo Rear Replacement Ring FAQs
Can these be used with factory Gallardo rotors or hats? No. The D2-034 rings are designed specifically for Girodisc aluminum hats and will not fit OEM one-piece or carbon-ceramic assemblies.
Are these compatible with both coupe and Spyder models? Yes. They fit all 2004–2008 Gallardo variants equipped with Girodisc 335mm two-piece rear rotor systems.
Do these improve braking performance over stock rotors? Yes. Girodisc’s two-piece floating design improves cooling, reduces weight, and enhances pedal feel during extended spirited driving or track use.
How often should I replace the rings? Replace the rings when rotor thickness reaches minimum specification or when surface cracking from heat cycling becomes visible.
Upgrade your Lamborghini Gallardo’s braking system with Girodisc D2-034 335mm rear replacement rings — engineered for precision, cooling, and durability worthy of a true Italian supercar.
GiroDisc Racing Brakes & Technologies
D2-100 Girodisc Audi B7 RS4 Rear Replacement Rings
$680.00
Girodisc Audi B7 RS4 Rear Rings
Refresh your Audi B7 RS4’s braking system with Girodisc D2-100 324mm rear replacement rings. These direct-fit rings are engineered to bolt directly onto your existing Girodisc aluminum hats, allowing you to replace only the wear surface instead of the full rotor assembly. Each kit includes both left and right rings along with all new floating hardware for an easy, complete installation.
Vehicle Fitment
Compatible with:• Audi B7 RS4 (2007–2008, rear)Note: Designed for Girodisc 324mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors.
Features
• Sold as a left/right pair with new floating hardware kit• Direct replacements for Girodisc 324mm two-piece rear rotors• High-carbon cast iron construction improves heat management and durability• Curved directional vanes enhance airflow and reduce fade• Maintains OEM brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands
Specifications
• Diameter: 324mm• Position: Rear• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rings and hardware kit• Sold/priced per pair
Girodisc D2-100 Audi RS4 Rear Replacement Ring FAQs
Do these rings work with the factory Audi RS4 brake pads? Yes, the Girodisc D2-100 rings are fully compatible with factory RS4 pad compounds as well as popular track options from Pagid, Ferodo, and Hawk.
How should I bed the new Girodisc rings after installation? Perform 8–10 moderate stops from 60 mph to 10 mph, allowing the brakes to cool between runs. This evenly transfers pad material and prevents uneven deposits.
Are these rings suitable for track use? Absolutely. The high-carbon alloy and floating design provide consistent performance under repeated high-temperature braking.
Can these rotors be resurfaced or turned? No. Due to the directional vane design and strict tolerances, resurfacing is not recommended — replacement rings are the correct service method.
Upgrade your Audi B7 RS4 braking system with Girodisc D2-100 324mm rear replacement rings — precision-engineered for cooling, durability, and consistent braking performance on street or track.
GiroDisc Racing Brakes & Technologies
A1-114 Girodisc BMW E9X 335i Front Rotors (2006-2008)
$1,050.00
BMW E9X 335i Front Rotors
Upgrade your BMW E9X 335i’s stopping power with Girodisc 2-piece floating front rotors — a direct bolt-on replacement designed to outperform the factory setup. No modifications are needed; these rotors mount seamlessly to your OEM calipers while preserving factory brake balance and ABS functionality. The Girodisc design cuts significant unsprung and rotational mass, improving handling, throttle response, and overall braking feel.
Each rotor features a CNC-machined 6061-T6 aluminum hat paired with Girodisc’s proprietary high-carbon cast-iron rings. The internal curved vane pattern is engineered to act as a centrifugal pump, drawing air through the rotor to dissipate heat under extreme conditions — from spirited canyon drives to full track sessions.
Precision-Crafted for Performance
Vehicle Fitment
BMW E90 / E92 / E93 335i
BMW E90 / E92 / E93 335is
Girodisc A1-114 Features
Direct replacement design: Bolts to OEM calipers with no modifications or spacers required.
Lightweight construction: Reduces unsprung weight for improved suspension response and steering feedback.
Curved vane cooling: Efficiently channels air through the disc for better heat dissipation and fade resistance.
Floating mount hardware: Uses cadmium-plated drive pins and anti-noise spring washers to manage thermal expansion silently.
Serviceable two-piece design: Replace only the iron rotor rings when worn, reducing long-term cost.
Made in the USA: All materials are sourced, cast, and machined in-house by Girodisc for consistent quality.
Girodisc A1-114 FAQs
Will these rotors fit my stock calipers? Yes. They’re a direct-fit upgrade that works perfectly with OEM 335i calipers.
Do I need to change brake pads? No. Your existing OEM or performance pads will fit without modification.
Are these rotors suitable for track days? Absolutely. The curved vane design ensures consistent braking and cooling under track conditions.
Do they make noise like other floating rotors? No. Girodisc uses anti-noise spring washers to eliminate rattling while allowing full float under heat.
How are they sold? Sold and priced per pair.
Bring your BMW’s braking to the next level with Girodisc front rotors — lighter, cooler, and engineered to deliver track-proven performance with factory-level refinement.
GiroDisc Racing Brakes & Technologies
A2-114 Girodisc BMW E9X 335i Rear Rotors
$1,050.00
Girodisc BMW E9X 335i Rear Rotors
Upgrade your BMW 335i’s braking system with Girodisc’s lightweight two-piece rear rotors, precision-engineered to deliver sharper response, improved cooling, and reduced unsprung mass. Designed as a true OEM replacement, these rotors enhance both street comfort and track performance without altering factory balance or ABS calibration.
Vehicle Fitment
BMW 335i (E90 Sedan / E92 Coupe / E93 Convertible, 2007–2013)BMW 335is (E92 / E93, 2011–2013)Compatible with OEM single-piston rear calipers and factory hardware.
Engineered for Precision and Performance
The Girodisc system installs directly onto your vehicle with no modifications required. Each rotor features a 6061-T6 aluminum hat mated to Girodisc’s proprietary cast-iron friction ring for optimal thermal stability. The floating two-piece design allows even heat expansion, preventing warping and maintaining consistent pedal feedback. Curved internal vanes act as centrifugal pumps, channeling air through the rotor to maximize cooling efficiency and durability under repeated heavy braking.
Features
• Direct OEM replacement – bolts to factory hubs• 6061-T6 billet aluminum hats with hard-anodized finish• Proprietary cast-iron friction rings cast and machined in the USA• Floating mount system with cadmium-plated steel drive pins• Anti-noise spring washers eliminate rattle while maintaining float• Curved vane internal design enhances cooling• Significantly lighter than OEM rotors for reduced unsprung weight• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-114 Rear Rotor FAQs:
Do these rotors fit all E9X 335i models? Yes. They fit the E90, E92, and E93 BMW 335i and 335is models equipped with factory brake systems.
Will I need to change my pads? No. Girodisc rotors are designed to work seamlessly with your existing OEM or performance pads.
What benefits will I notice after installation? Expect smoother pedal feel, improved brake modulation, and faster cooling between stops thanks to reduced mass and enhanced airflow.
Are these suitable for daily use and track days? Absolutely. Girodisc rotors are engineered for dual-purpose performance—quiet and reliable on the street, yet resilient enough for track sessions.
Transform the braking performance of your E9X BMW with Girodisc rear rotors—crafted for drivers who demand precision, balance, and performance at every stop.
GiroDisc Racing Brakes & Technologies
A1-003 Girodisc 2pc Front Brake Rotors
$1,200.00
When you're chasing precision braking and consistent performance, the A1-003 Girodisc 2pc Front Brake Rotors is engineered to keep you ahead of the pack—on the street or at the track.
A1-003 Girodisc 2pc Front Brake Rotors
High-Performance 2-Piece Brake Rotors
Key Features:
Direct OE Replacement: A seamless fit for your vehicle, designed for those running OEM steel brakes.
Advanced 2-Piece Design: Lightweight 6061-T6 aluminum hats mated to high-carbon cast iron rotors reduce unsprung mass and improve thermal management.
Curved Vane Internal Cooling: Built to pull air through the rotor for maximum heat dissipation under heavy braking.
Floating Mount Hardware: 10 high-strength drive pins with anti-noise springs allow proper expansion while keeping things quiet.
Track-Tested Durability: Trusted by enthusiasts and racers alike for fade-resistant, confidence-inspiring performance.
A1-003 Girodisc 2pc Front Brake Rotors FAQs:
Is this rotor compatible with carbon ceramic systems?No, it's only for models equipped with factory steel rotors.
Can I install it myself? Yes, it's a direct replacement and fits without modification.
Will it improve stopping power? Absolutely—especially when paired with high-performance brake pads and fluid.
How long do these rotors typically last?Lifespan depends on driving conditions, but the floating design allows you to replace just the ring, not the whole rotor.
Upgrade your braking system with Girodisc performance and feel the difference every time you hit the brakes.
GiroDisc Racing Brakes & Technologies
A1-016 Girodisc Ferrari F40 Front Rotors, 355mm
$1,600.00
A1-016 Girodisc Ferrari F40 Front Rotors
The Girodisc system is a direct replacement for the OE front rotors on the Ferrari F40. No modifications are required—the discs bolt directly to the car and work perfectly with the factory calipers. This upgrade provides a lighter, high-performance braking solution that maintains factory brake bias and ABS functionality while improving cooling, response, and overall brake feel.
High-Performance Construction
The central hat section is made from U.S.-sourced 6061-T6 aircraft-grade aluminum for maximum strength and reduced weight. The rotor rings are Girodisc’s proprietary cast iron, poured and machined entirely in-house in the USA. The curved vane design—developed in motorsport—acts as a centrifugal pump that forces air through the disc, improving cooling and consistency under extreme conditions.
Girodisc A1-016 Features
Direct bolt-on replacement for OEM rotors—no modifications required
Lightweight two-piece floating design reduces unsprung and rotational mass
6061-T6 aluminum hat and proprietary high-carbon iron rotor rings
Curved vane design for maximum cooling efficiency
Floating mount system allows thermal expansion and prevents warping
Cadmium-plated drive pins resist corrosion for long service life
Anti-noise spring washers ensure quiet operation for street and track
Fully rebuildable—replace only the iron rings as needed
Vehicle Fitment
Ferrari F40 (1987–1992)
Technical Specifications
Part Number: A1-016
Position: Front
Rotor Diameter: 355mm
Rotor Type: Two-piece floating
Hat Material: 6061-T6 aluminum, anodized
Disc Material: Girodisc proprietary high-carbon cast iron
Vane Design: Curved, directional
Drive Pins: 10 high-strength alloy steel, cadmium-plated
Hardware: Class 12.9 cap screws with hardened washers
Sold/Price: Per pair
Girodisc A1-016 FAQs
Are these rotors a direct replacement? Yes. The Girodisc system bolts directly in place of the factory rotors using OEM hardware with no modifications required.
Do they make noise during street use? No. Anti-noise spring washers prevent rattles while allowing the floating system to function properly.
Are replacement rings available? Yes. You can purchase replacement iron rings separately and reuse your aluminum hats and hardware.
Are they suitable for track use? Absolutely. Girodisc rotors are engineered for both spirited street driving and demanding track performance.
Upgrade your Ferrari F40 with Girodisc’s precision-engineered floating rotors—built for reduced weight, improved cooling, and consistent performance on road and track.
