GiroDisc Racing Brakes & Technologies
A2-049 Girodisc Porsche Cayman Iron Conversion Rear Rotors
$1,350.00
Girodisc Porsche Cayman Iron Conversion Rear Rotors
Convert your PCCB-equipped Porsche Cayman or Boxster to a high-performance iron rotor system with Girodisc’s precision-engineered rear rotors. Designed as a direct replacement for OEM carbon-ceramic discs, these rotors deliver superior heat management, consistent pedal feel, and lower replacement costs without compromising braking balance or ABS function.
Vehicle Fitment
Porsche 987 Cayman S / Cayman R (PCCB-equipped)Porsche 987 Boxster S (PCCB-equipped)Direct replacement for factory carbon-ceramic rotorsBolts directly to OEM calipers—no modifications required
High-Performance Design for Real-World Driving
The Girodisc system replaces the stock PCCB units with a two-piece floating iron rotor designed for durability and serviceability. Each rotor assembly features a CNC-machined 6061-T6 aluminum hat mated to Girodisc’s proprietary cast-iron friction ring. The curved vane internal design functions as a centrifugal air pump, maintaining consistent cooling under high braking loads. This setup preserves factory brake bias and pedal response while offering a more robust and affordable long-term solution for track or street use.
Features
• Direct PCCB replacement – no modifications required• 6061-T6 aluminum hats machined and anodized in the USA• Proprietary cast-iron friction rings cast and finished in-house• Floating mount design with cadmium-plated steel drive pins• Anti-noise spring washers eliminate rattle while allowing thermal expansion• Curved internal vanes maximize airflow and heat dissipation• Maintains OEM brake bias and ABS calibration• Fully rebuildable – replace only friction rings when needed• Sold/priced per pair
Girodisc A2-049 Rear Rotor FAQs:
Will these work with OEM PCCB calipers? Yes. These rotors are specifically designed for Caymans and Boxsters originally equipped with PCCB systems and bolt directly to the factory calipers.
Why convert from PCCB to iron? Iron rotors offer greater thermal capacity and reduced replacement cost while still providing strong, consistent performance on street or track.
Do these affect brake bias or ABS? No. Girodisc designs each conversion to maintain factory braking balance and ABS function.
Are they rebuildable? Yes. When worn, only the iron friction rings need to be replaced—saving cost and maintaining long-term reliability.
Upgrade your Cayman or Boxster’s braking system with Girodisc iron conversion rotors—precision-built for performance, reliability, and control.
GiroDisc Racing Brakes & Technologies
A2-049B Girodisc Porsche 718 GTS 4.0 / 981 Spyder Rear Rotors (with Spacers & Bolts)
$1,350.00
Girodisc Porsche 718 GTS 4.0 / 981 Spyder Rear Rotors (with Spacers & Bolts)
The Girodisc A2-049B Rear Rotor Kit delivers high-performance braking and improved cooling for Porsche 718 GTS 4.0 and 981 Spyder models. Designed as a direct replacement for the OE discs, this 2-piece floating rotor system includes caliper spacers and longer bolts for easy installation of the larger diameter rotors. The result is enhanced braking torque, reduced unsprung mass, and a significant upgrade in heat dissipation—all while maintaining factory balance and ABS function.
Precision Engineering & Lightweight Performance
Each rotor features a CNC-machined 6061-T6 aluminum hat mated to Girodisc’s proprietary cast iron ring, ensuring optimal strength and weight reduction. The 2-piece floating design reduces rotational inertia and improves handling response. The rotor’s curved vane internal design acts as a centrifugal pump, channeling air through the disc to maximize cooling efficiency during hard use on the street or track.
Floating Mount System & Quiet Operation
The Girodisc floating mount system uses 10 high-strength alloy steel drive pins manufactured in-house in the USA. These pins, cadmium-plated for corrosion resistance, connect the rotor ring to the aluminum hat via class 12.9 cap screws and hardened washers. Anti-noise spring washers allow thermal expansion while eliminating unwanted rattles—offering a race-proven floating design that’s quiet enough for everyday driving.
Vehicle Fitment
Porsche 718 GTS 4.0
Porsche 981 Spyder
Includes spacers and longer bolts for installation
Requires 991 Carrera S/4S/GTS rear pad shape for full pad sweep
Direct bolt-on replacement, no modifications required
Technical Specifications
CMS Number: A2-049B
Position: Rear
Rotor Diameter: 350mm (includes spacers & bolts)
Design: 2-piece floating assembly
Material: Proprietary cast iron rotor ring with 6061-T6 aluminum hat
Vane Design: Curved directional vanes for efficient air cooling
Hardware: Cadmium-plated drive pins, class 12.9 cap screws, anti-noise washers
Rebuildable: Yes — replace rotor rings and reuse hats
Sold/Price: Per pair
FAQs for Girodisc A2-049B
Do these rotors require modifications? No. The kit includes caliper spacers and longer bolts, allowing for direct installation with OEM calipers.
What brake pads should I use? Use the 991 Carrera S/4S/GTS rear pad shape for complete pad sweep across the larger rotor surface.
Are these rotors quieter than typical floating designs? Yes. Girodisc’s anti-noise spring washers ensure smooth, silent operation during street and track use.
Can the rings be replaced? Yes. These rotors are fully rebuildable with replacement rings available from Girodisc.
Upgrade your Porsche 718 GTS 4.0 or 981 Spyder with Girodisc A2-049B Rear Rotors for reduced unsprung weight, improved cooling, and consistent braking performance lap after lap.
GiroDisc Racing Brakes & Technologies
A2-050 Girodisc 2pc Rear Brake Rotors (Garage Sale)
$975.66
$1,300.00
A2-050 Girodisc 2pc Rear Brake Rotors (Discontinued Design)
Fits Lamborghini Huracan / Lamborghini Gallardo 2009-2012 / Audi R8
Discontinued New old stock rotor. These have the straight grooves as images show, not the new curved grooves. Final Sale, no returns or exchanges.
The GiroDisc system is an upgrade to a 395mm 2-piece steel rotor and aluminum hat combination and is a direct replacement for the OEM brake disc. Â The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly. Â By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency. Â The Giro Disc rotors are lighter than OEM pieces. Â The reduction in rotational and unsprung weight allows for quicker acceleration and suspension response.
When used with Pagid or PFC performance brake pads, and Competition Motorsport RF-1 brake fluid (also available from CompetitionMotorsport.com), you have an amazing solution to overheating, cracking and warping rotors.
The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. Â The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. Â The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. Â
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. Â The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. Â The pins are secured by grade12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors.
The 2-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling.
Sold/Priced per pair.
GiroDisc Racing Brakes & Technologies
A2-050 Girodisc Audi R8 / Lamborghini Rear Rotors
$1,350.00
Girodisc Audi R8, Lamborghini Rear Rotors
Unlock world-class braking performance with Girodisc’s lightweight two-piece rear rotors for the Audi R8 and Lamborghini platform. Designed as a direct OEM replacement, these precision-engineered rotors enhance cooling efficiency, reduce unsprung mass, and maintain perfect brake balance under demanding conditions on the street or track.
Vehicle Fitment
Audi R8 (All V8 & V10 Models, including Plus)Lamborghini Gallardo (All Models)Lamborghini Huracán (Iron Rotor Applications)Direct OEM replacement—works with factory calipers and hardware.
Lightweight, Precision-Machined Performance
The Girodisc system is a direct replacement for factory discs and bolts on with no modifications required. Each assembly pairs a CNC-machined 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction rings. The floating two-piece construction manages heat expansion evenly, improving rotor life and eliminating warping. Internal curved vanes act as centrifugal pumps to move air through the rotor for consistent cooling during extended performance driving.
Features
• Direct OEM replacement – bolts to factory hubs• 6061-T6 billet aluminum hats, machined and hard-anodized in the USA• Proprietary cast-iron friction rings with racing-grade metallurgy• Floating mount system with cadmium-plated steel drive pins• Anti-noise spring washers maintain float and prevent rattling• Curved internal vanes for superior heat evacuation• Significant unsprung weight reduction over OEM rotors• Maintains factory brake bias and ABS calibration• Fully rebuildable – replace only rotor rings when worn• Sold/priced per pair
Girodisc A2-050 Rear Rotor FAQs:
Will these fit both Audi R8 and Lamborghini models? Yes. These rotors are engineered for the shared Audi/Lamborghini chassis, ensuring a perfect OEM bolt-on fit with factory calipers.
Do these reduce weight compared to stock rotors? Absolutely. Girodisc’s two-piece design cuts significant unsprung and rotational weight for quicker response and improved handling.
Can I use these for track days? Yes. The high-carbon cast-iron material and curved vane design provide exceptional thermal stability under heavy braking conditions.
Do they work with OEM brake pads? 100%. You can use factory pads or upgrade to a performance compound for aggressive driving or racing use.
Enhance your Audi R8 or Lamborghini braking system with Girodisc rear rotors—engineered to deliver lightweight durability and consistent stopping power worthy of supercar performance.
GiroDisc Racing Brakes & Technologies
A2-054 Girodisc Ferrari 355 Challenge Rear Rotors
$1,400.00
Girodisc Ferrari 355 Challenge Rear Rotors
Transform the braking performance of your Ferrari 355 Challenge with Girodisc’s lightweight two-piece rear rotors. Designed as a direct OEM replacement, these rotors reduce unsprung mass, improve cooling, and deliver smoother, more consistent braking performance lap after lap—without compromising your factory setup.
Vehicle Fitment
Ferrari 355 ChallengeCompatible with OEM calipers and hardwareDirect bolt-on installation – no modifications required
Precision-Built for Performance
The Girodisc system is engineered to replace the factory cast rotors while maintaining factory brake bias and ABS function. Each assembly features a CNC-machined 6061-T6 aluminum hat mated to Girodisc’s proprietary cast-iron rotor ring, both manufactured in the USA. The two-piece floating design allows controlled thermal expansion, reducing distortion and extending rotor and pad life. Internal curved vanes act as centrifugal pumps to draw air through the rotor, ensuring stable temperatures even under repeated heavy braking.
Features
• Direct OEM replacement – bolts to factory hubs• 6061-T6 aircraft-grade aluminum hats• Proprietary cast-iron friction rings machined in the USA• Floating mount system with cadmium-plated steel drive pins• Anti-noise spring washers prevent rattle while allowing float• Curved internal vanes improve airflow and cooling• Significantly lighter than OEM rotors – reduces unsprung weight• Maintains factory bias and ABS calibration• Fully rebuildable – replace only friction rings when needed• Sold/priced per pair
Girodisc A2-054 Rear Rotor FAQs:
Are these a direct fit for the Ferrari 355 Challenge? Yes. Girodisc rotors are engineered to fit factory hubs and calipers with zero modification required.
Can I use these with stock brake pads? Absolutely. They are fully compatible with OEM or performance pads, allowing you to tune braking response for street or track use.
What’s the benefit of a two-piece design? The aluminum hat reduces unsprung weight, while the floating iron rotor ring allows thermal expansion without warping, improving consistency and service life.
Are they track ready? Yes. Girodisc rotors are built for demanding motorsport use, offering exceptional fade resistance and predictable braking under extreme heat.
Enhance your 355 Challenge’s braking precision with Girodisc rear rotors—engineered for Ferrari performance, proven on the track.
GiroDisc Racing Brakes & Technologies
A2-056 Girodisc 2pc Rear Brake Rotors (2010-2016) (Garage Sale)
$1,087.66
$1,450.00
A2-056 Girodisc 2pc Rear Brake Rotors (2010-2016) (Discontinued Design)
Fits Mercedes E63 AMG
Discontinued New old stock rotor. These have the straight grooves as images show, not the new curved grooves. Final Sale, no returns or exchanges.
The GiroDisc system is an upgrade to a two-piece steel rotor and aluminum hat combination; it is a direct replacement for the OEM brake disc. Â The two-piece floating disc will bolt directly to your car and work with OEM calipers perfectly. Â By upgrading your brakes with these lightweight, high-performance replacements as opposed to a big brake kit, your factory brake bias is maintained as well as your ABS efficiency. Â GiroDisc rotors are lighter than OEM pieces. The reduction in rotational and unsprung mass (approx. eight pounds per corner!) allows for quicker acceleration and suspension response.
When used with GiroDisc Magic Pads for the street, Pagid or PFC racing brake pads for the track, and Competition Motorsport RF-1 brake fluid (all available from Competition Motorsport), you have an amazing solution to overheating, cracking and warping rotors.
The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. Â The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. Â The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. Â
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. Â The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. Â The pins are secured by Grade 12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors.
The two-piece GiroDisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling.
Sold/Priced per pair.
GiroDisc Racing Brakes & Technologies
A2-056 Girodisc Mercedes E63, CLS63, C63 Black Series Rear Rotors
$1,450.00
Girodisc Mercedes E63, CLS63, C63 Black Series Rear Rotors
Give your AMG the braking performance it deserves with Girodisc lightweight two-piece rear rotors. Engineered as a precise OEM replacement, these rotors reduce unsprung weight, enhance pedal feel, and maintain flawless factory balance—all while offering superior thermal control for both road and track driving.
Vehicle Fitment
Mercedes-Benz E63 AMG (W211, W212)Mercedes-Benz CLS63 AMG (W219, W218)Mercedes-Benz C63 AMG Black Series (C204)Direct OEM replacement compatible with factory calipers and hardware.
Race-Bred Engineering for Street and Track
The Girodisc system bolts directly to your vehicle with no modifications required. Each rotor combines a CNC-machined 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction ring, both designed and produced in the USA. The two-piece floating assembly allows for controlled expansion under heat, maintaining consistent pad contact and eliminating distortion. Internal curved vanes act as centrifugal pumps, channeling air through the rotor to prevent heat soak during heavy braking.
Features
• Direct OEM replacement—no modification required• 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 and ensure proper float• Curved vane internal design maximizes airflow for better cooling• 14.4 lbs vs. 22.5 lbs OEM—saves over 8 lbs per corner• Retains factory ABS function and brake bias• Fully rebuildable—replace only the friction rings when needed• Sold/priced per pair
Girodisc A2-056 Rear Rotor FAQs:
Are these rotors a direct fit for AMG models? Yes. Girodisc designed these rotors to bolt directly onto E63, CLS63, and C63 Black Series models without any modification or additional hardware.
What kind of performance gains can I expect? You’ll notice reduced fade, quicker braking response, and sharper pedal feel thanks to lower weight and better cooling efficiency.
Do they work with OEM brake pads? Absolutely. They’re fully compatible with factory pads and calipers, or you can upgrade to performance pads for track use.
Are they rebuildable? Yes. When the friction rings wear out, you can replace just those components, keeping your aluminum hats and saving long-term costs.
Experience confident, consistent braking on every drive with Girodisc rear rotors—precision-built for AMG performance without compromise.
GiroDisc Racing Brakes & Technologies
A2-056DS Girodisc Mercedes E63, CLS63, and C63 Black Series Rear Rotors (Dimpled & Slotted)
$1,550.00
Girodisc Mercedes E63, CLS63, C63 Black Series Rear Rotors (Dimpled & Slotted)
Experience race-proven stopping power with Girodisc dimpled and slotted rear rotors for the Mercedes E63, CLS63, and C63 Black Series. These precision-engineered, two-piece rotors deliver improved cooling, reduced fade, and smoother pedal feel—all while maintaining OEM fitment and ABS function. Perfect for performance street driving and heavy track use alike.
Vehicle Fitment
Mercedes-Benz E63 AMG (W211, W212)Mercedes-Benz CLS63 AMG (W219, W218)Mercedes-Benz C63 AMG Black Series (C204)Direct OEM replacement using factory calipers and hardware.
Performance-Driven, Lightweight Construction
The Girodisc system bolts directly to your factory hubs with no modifications needed. Each rotor is built from two precision-matched components: a 6061-T6 aluminum hat and Girodisc’s proprietary high-carbon cast-iron friction ring. The floating mount system allows controlled movement under high temperatures, reducing stress and maintaining a consistent braking surface. Internal curved vanes and performance slotting evacuate heat and gases for stable performance during repeated heavy braking.
Features
• Direct OEM replacement – installs with no modification• Dimpled & slotted rotor faces for enhanced bite and heat dissipation• 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 prevent rattle while maintaining float• 48 curved directional vanes improve airflow and reduce rotor temperatures• Significantly lighter than OEM rotors – reduces unsprung mass• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-056DS Rear Rotor FAQs:
Are these a direct fit for my AMG? Yes. These Girodisc rotors install directly on E63, CLS63, and C63 Black Series models using OEM calipers and hardware—no modification required.
What’s the difference between dimpled and slotted rotors? The dimpled and slotted pattern increases bite, improves pad deglazing, and helps evacuate gases and dust during high-temperature braking.
Do they affect daily drivability? Not at all. Despite their motorsport design, Girodisc rotors remain quiet and smooth under normal driving conditions thanks to the anti-noise floating system.
Are these suitable for track use? Absolutely. They’re engineered for repeated high-load braking, making them ideal for both spirited street driving and serious track sessions.
Enhance your AMG’s braking control and thermal stability with Girodisc dimpled and slotted rear rotors—crafted in the USA for precision, performance, and confidence in every stop.
GiroDisc Racing Brakes & Technologies
A2-067 Girodisc Ford S550 Mustang Rear Rotors
$950.00
Girodisc Ford S550 Mustang Rear Rotors
The Girodisc A2-067 Rear Rotors are a direct replacement for the factory rotors on the Ford S550 Mustang, engineered for performance enthusiasts who demand precision braking, reduced weight, and long-term serviceability. These 2-piece floating assemblies maintain the OEM fit and brake bias while providing measurable improvements in cooling and responsiveness.
Lightweight Performance & Heat Management
Each rotor features a 6061-T6 aluminum hat mated to a high-carbon cast iron rotor ring. This construction reduces unsprung and rotational mass, improving suspension response and acceleration. The 48 curved directional vanes act as a centrifugal pump, pulling cool air through the hub to dissipate heat and prevent fade during extended track sessions or spirited driving.
Race-Ready Floating Design
The Girodisc floating mount system connects the rotor ring to the aluminum hat via cadmium-plated steel drive pins secured with Belleville washers and spring clips. This setup allows the ring to expand under high heat without distortion, maintaining consistent pedal feel and preventing vibration or noise. The result is a rotor that performs flawlessly on both the street and track.
Vehicle Fitment
Ford Mustang S550 (2015+ models with performance package)
Direct rear rotor replacement; compatible with OEM calipers and hardware
Technical Specifications
Part Number: A2-067
Position: Rear
Material: High-carbon cast iron rotor ring with 6061-T6 aluminum hat
Vane Design: 48 curved directional vanes
Minimum Thickness: 23 mm
Rebuildable: Yes — replace rotor rings, reuse hats and hardware
Sold/Price: Per pair
FAQs
Are these rotors a direct fit? Yes, the Girodisc A2-067 bolts directly to the S550 Mustang hub and uses the factory calipers and pads.
What benefits do 2-piece rotors provide? They reduce rotational weight, improve cooling, and allow ring replacement for long-term cost savings.
Can I use these on the street? Absolutely. Girodisc rotors are quiet and durable for street use, yet fully capable of handling aggressive track driving.
When should I replace the rings? Replace them when they reach the 23 mm minimum thickness or if a crack extends to the rotor edge.
Enhance your Ford S550 Mustang’s braking performance with Girodisc’s lightweight, rebuildable rear rotors — engineered for precision, durability, and confidence on every lap.
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
A2-072DS Girodisc Mercedes S55 / CL55 Rear Rotors (Dimpled & Slotted)
$1,450.00
Girodisc Mercedes S55 / CL55 Rear Rotors (Dimpled & Slotted)
The Girodisc A2-072DS Rear Rotor Kit delivers a lightweight, high-performance braking upgrade for Mercedes-Benz S55 and CL55 models. These 2-piece, fully floating rotors feature a dimpled and slotted surface for superior pad bite and efficient heat evacuation. Designed as a direct OE replacement, the kit bolts on without any modifications while maintaining factory brake bias and ABS performance.
Lightweight 2-Piece Construction
Each Girodisc assembly combines a precision-machined 6061-T6 aluminum hat with a proprietary cast iron rotor ring, engineered for strength, cooling, and weight reduction. The 2-piece design significantly decreases unsprung and rotational mass, improving acceleration, suspension response, and overall handling. The dimpled and slotted rotor faces provide consistent pad deglazing and gas venting for enhanced braking feel under repeated heavy use.
Floating Mount System & Anti-Noise Hardware
Girodisc’s advanced floating mount system uses 10 high-strength alloy steel drive pins manufactured in-house in the USA. These pins are cadmium-plated for corrosion resistance and secured by class 12.9 cap screws with hardened washers. Anti-noise spring washers allow the rotor to expand and contract with heat while eliminating unwanted rattle, ensuring quiet operation for street driving and track sessions alike.
Vehicle Fitment
Mercedes-Benz S55 AMG (W220)
Mercedes-Benz CL55 AMG (C215)
Direct bolt-on installation—no modifications required
Dimpled & slotted rotor surface for increased friction and heat management
Technical Specifications
CMS Number: A2-072DS
Position: Rear
Design: 2-piece floating rotor, dimpled & slotted surface
Material: Proprietary cast iron with 6061-T6 aluminum hat
Vane Design: Curved internal vanes for superior cooling
Weight Savings: Approx. 8.1 lbs lighter per rotor vs. OEM
Hardware: Cadmium-plated pins, class 12.9 cap screws, anti-noise washers
Rebuildable: Yes — replaceable rings and reusable aluminum hats
Sold/Price: Per pair
FAQs
Are these rotors a direct fit for my Mercedes S55 or CL55? Yes. They are a true bolt-on replacement that works perfectly with OEM calipers and brake pads.
What’s the benefit of dimpled and slotted rotors? The dimpled and slotted design improves pad bite, releases gases during hard braking, and helps maintain consistent stopping power.
Will these rotors make noise? No. Girodisc’s anti-noise spring washers eliminate rattle while preserving the benefits of a fully floating setup.
Can the rotor rings be replaced? Yes. The Girodisc system is fully rebuildable—replace worn rings and reuse the aluminum hats for long-term value.
Upgrade your Mercedes S55 or CL55 with Girodisc A2-072DS Rear Rotors for a lightweight, performance-focused braking solution that delivers improved stopping power, better cooling, and refined street manners—all made in the USA.
GiroDisc Racing Brakes & Technologies
A2-075 Girodisc Ferrari 599 GTB Rear Iron Rotor Conversion
$1,900.00
Girodisc Ferrari 599 GTB Rear Iron Rotor Conversion
Transform your Ferrari 599 GTB’s braking performance with Girodisc’s rear iron rotor conversion. Designed as a direct replacement for factory carbon ceramic rotors, this system provides superior heat management, improved pedal feedback, and lower long-term maintenance costs—all without altering OEM fit or balance.
Vehicle Fitment
Ferrari 599 GTB Fiorano (2006–2012)Compatible with OEM Brembo calipers and hardware.Direct replacement for vehicles equipped with factory carbon ceramic rotors.
Engineered for Performance and Serviceability
The Girodisc system bolts directly to the factory hubs—no modifications required. Each rotor assembly combines a lightweight 6061-T6 aluminum hat with Girodisc’s proprietary cast-iron friction ring, both designed and machined in the USA. The two-piece floating design allows for controlled thermal expansion, improving heat dissipation and eliminating pedal vibration under high stress. Curved internal vanes act as centrifugal pumps, drawing air through the disc to maintain stable temperatures during aggressive braking.
Features
• Direct replacement for OEM carbon ceramic rear rotors• 6061-T6 billet aluminum hats with a hard-anodized finish• Proprietary cast-iron friction rings, poured and machined in the USA• Floating mount system with 10 cadmium-plated steel drive pins• Anti-noise spring washers eliminate rattle while maintaining float• Curved vane internal design enhances airflow and cooling• Lower replacement cost and improved pedal modulation vs. carbon ceramics• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-075 Rear Iron Rotor Conversion FAQs:
Why convert from carbon ceramic to iron rotors? Girodisc iron rotors provide better heat control and a more linear pedal feel while drastically reducing replacement costs. They’re also easier to service and ideal for track or high-mileage use.
Are these compatible with OEM calipers? Yes. These rotors are designed to work seamlessly with the original Brembo calipers and hardware—no adapters or spacers required.
Do they change braking bias or ABS calibration? No. Girodisc rotors retain factory dimensions and mass balance to preserve stock brake performance and ABS function.
Can I revert to carbon ceramic rotors later? Yes. This conversion is fully reversible, allowing a return to the OEM configuration if desired.
Upgrade your Ferrari 599 GTB with Girodisc’s rear iron rotor conversion—crafted for superior control, reduced maintenance, and confidence-inspiring braking performance on road or track.
GiroDisc Racing Brakes & Technologies
A2-078 Girodisc Alfa Romeo 4C Rear Rotors
$995.00
Girodisc Alfa Romeo 4C Rear Rotors
Unlock sharper braking response and improved heat management in your Alfa Romeo 4C with Girodisc’s lightweight, two-piece rear rotors. Precision-built for performance, these rotors reduce unsprung weight, enhance cooling, and maintain OEM braking balance—ideal for both spirited road driving and track-day performance.
Vehicle Fitment
Alfa Romeo 4C (2015–2020)Compatible with factory rear calipers and hardware.
Lightweight, High-Performance Construction
The Girodisc system is a direct OEM replacement that bolts to the factory hubs with no modifications required. Each rotor features a 6061-T6 billet aluminum hat mated to Girodisc’s proprietary cast-iron friction ring for optimal durability and thermal efficiency. The floating design allows for controlled heat expansion, eliminating warping and maintaining consistent pedal feel. Internal curved vanes act as centrifugal pumps, drawing cooling air through the disc to keep braking temperatures stable under aggressive use.
Features
• Direct OEM replacement – no modifications required• 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 prevent rattle while maintaining float• Curved vane design enhances airflow and heat dissipation• Lightweight design reduces unsprung and rotational mass• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-078 Rear Rotor FAQs:
Are these rotors a direct replacement for OEM? Yes. Girodisc rotors install using factory calipers, pads, and hardware—no modification required.
What benefits will I see over stock rotors? You’ll experience faster heat recovery, more stable braking under repeated stops, and a noticeable reduction in unsprung weight for sharper handling.
Do these work with the factory brake pads? Absolutely. They’re compatible with OEM pads or any aftermarket performance compound designed for iron rotors.
Are these suitable for track use? Yes. Girodisc rotors are engineered for high-performance environments, providing consistent braking torque and fade resistance in demanding conditions.
Enhance your Alfa Romeo 4C’s agility and control with Girodisc rear rotors—lightweight, rebuildable, and precision-engineered for drivers who demand more from every stop.
GiroDisc Racing Brakes & Technologies
A2-081 Girodisc 2pc Rear Brake Rotors (Garage Sale)
$675.66
$900.00
A2-081 Girodisc 2pc Rear Brake Rotors (Discontinued Design)
FITMENT (REAR):
Ford Shelby GT500 (2007-12)
Ford Mustang BOSS 302(S)
Ford Mustang GT (2011-14 w/ Brembo calipers)
Discontinued New old stock rotor. These have the straight grooves as images show, not the new curved grooves. Final Sale, no returns or exchanges.
Competition Motorsport is an authorized dealer for Girodisc products and we are one of the largest stocking dealers in the country. Â We ship most products same or next business day to ensure we meet your delivery deadline.
This Girodisc system is an upgrade to a two-piece steel rotor and aluminum hat combination as a direct replacement for the OEM brake discs.  The Girodisc floating rotors will bolt directly to your Mustang and work flawlessly with OEM calipers.  By upgrading your brakes with these lightweight high-performance replacements, as opposed to a big brake kit, your factory bias is maintained as well as your ABS effectiveness and efficiency.  The Girodisc rotors are lighter than OEM pieces, resuutling in a reduction in rotational and unsprung weight (4 lbs per corner) allowing for quicker acceleration, stronger braking, and faster suspension response.
When used with Pagid or PFC performance brake pads, and Competition Motorsport RF-1 brake fluid, you have the best possible solution to overheating, cracking, and warping rotors.
The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. Â The disc is manufactured from cast iron constructed in the USA, made to the same specification with the same material used by professional racing organizations. Â The rotors' curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. Â
The rotor and hat mount together through a floating mount system which utilizes ten high strength alloy steel drive pins manufactured by Girodisc in the USA to their own specifications and are cadmium plated for corrosion resistance. Â The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. Â The pins are secured by Grade-12 cap screws with hardened washers and mounted with anti-noise spring washers to allow for heat expansion while eliminating the rattle and noise associated with floating rotors.
The two-piece Girodisc design allows for rotor only replacement as well to minimize future replacement costs and deliver outstanding performance and cooling.
Sold/priced per pair.
GiroDisc Racing Brakes & Technologies
A2-081 Girodisc Ford S197 Mustang Rear Rotors
$900.00
Girodisc Ford S197 Mustang Rear Rotors
Upgrade your S197 Mustang’s braking performance with Girodisc’s lightweight, two-piece rear rotors—precision-engineered to improve cooling, reduce weight, and deliver more consistent stopping power. Perfect for drivers who want sharper pedal response and reduced fade without switching to an expensive big brake kit.
Vehicle Fitment
Ford Mustang (S197 Chassis, 2005–2014)Including GT, Boss 302, and Shelby GT500 modelsCompatible with OEM rear calipers and hardware.
Lightweight Performance Meets OEM Fitment
The Girodisc system bolts directly to the factory hubs—no modifications required. Each rotor features a 6061-T6 aluminum hat mated to Girodisc’s proprietary cast-iron friction ring for the ideal balance of strength, heat capacity, and weight savings. The floating design allows for controlled thermal expansion, keeping the pedal firm under extreme braking. Internal curved vanes act as centrifugal pumps, drawing air through the disc to improve heat dissipation and prevent fade during repeated hard stops.
Features
• Direct OEM replacement – installs with no modifications• 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 while maintaining float• Curved vane internal design enhances airflow and cooling efficiency• Significantly lighter than OEM rotors, reducing unsprung mass• Fully rebuildable – replace only the iron rings when worn• Sold/priced per pair
Girodisc A2-081 Rear Rotor FAQs:
Are these rotors compatible with all S197 Mustangs? Yes. They fit 2005–2014 GT, Boss 302, and Shelby GT500 models equipped with OEM rear calipers.
Do they require any modification to install? No. These rotors bolt directly to the stock hubs and use the factory brake components and hardware.
What’s the main benefit of switching to Girodisc rotors? They reduce unsprung weight and improve cooling efficiency, providing quicker pedal response and more consistent braking under heavy use.
Can I use OEM or aftermarket pads? Absolutely. Girodisc rotors are fully compatible with factory pads or performance-oriented compounds for track or street use.
Improve your Mustang’s braking confidence and control with Girodisc rear rotors—lightweight, rebuildable, and built to perform on both the street and the circuit.
GiroDisc Racing Brakes & Technologies
A2-083 Girodisc 2pc Rear Brake Rotors
$1,300.00
FITS:Â NISSAN GTR (2012+)
Competition Motorsport is an Authorized dealer for GiroDisc products and we are one of the largest stocking dealers in the country. Â We ship most products same or next business day to ensure we meet your delivery deadline.
The GiroDisc system is an upgrade to a 2-piece steel rotor and aluminum hat combination and is a direct replacement for the OEM brake disc.  The 2-piece floating disc will bolt directly to the car and work with OEM calipers perfectly.  By upgrading your brakes with these lightweight high-performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your ABS efficiency.  The Giro Disc rotors are lighter than OEM pieces.  The reduction in rotational and unsprung weight (8 lbs per corner) allows for quicker acceleration and suspension response.
When used with Pagid performance brake pads, and either Torque RT700 or Prospeed RS683 hi temp fluid (all  available from CompetitionMotorsport.com), you have an amazing solution to overheating and warping rotors.
The central hat section of the disc is made from 6061-T6 aircraft specification aluminum. Â The disc is manufactured from cast iron which is constructed in the USA and is made to the same specification with the same material used by professional racing organizations. Â The rotors curved vane design was developed in racing and acts as a centrifugal pump to force cooling air through the disc. Â
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. Â The alloy drive pins transfer the load from the brake action while maintaining the axial and radial float between the disc rotor and hat. Â 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 as well to minimize future replacement costs and deliver outstanding performance and cooling.
Sold/Priced per pair.
