Girodisc Rotors

Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) The Girodisc GD380.32.52 Replacement Rotor Rings (D52) are designed as direct replacements for worn rotor rings in your existing Girodisc two-piece brake system. Manufactured in-house to the same exacting standards as all Girodisc components, these 380x32mm rings restore your braking performance while allowing you to reuse your original aluminum hats and hardware. Restore Peak Braking Performance Each Girodisc replacement ring is cast from Girodisc’s proprietary iron alloy in the USA and precision machined to exacting tolerances. The curved vane internal design functions as a centrifugal air pump, improving airflow and heat dissipation to keep temperatures consistent lap after lap. These replacement rings include new hardware and are ready to bolt directly onto your existing Girodisc hats. Features • Size: 380mm x 32mm (D52)• Direct replacement rotor rings for Girodisc two-piece systems• Compatible with Girodisc aluminum hats using D52 pattern• Proprietary cast iron alloy poured and machined in the USA• Curved vane internal geometry for maximum cooling efficiency• Includes new hardware kit for installation• Reuses existing aluminum hats• Sold/priced per pair Vehicle Fitment The Girodisc GD380.32.52 Replacement Rotor Rings (D52) fit multiple Girodisc brake systems used on high-performance vehicles, including:• Porsche 997.2 Turbo / Turbo S• Porsche 991 Carrera / Carrera S (with Girodisc 380mm upgrade kit)• Audi R8 V8 / V10 (with Girodisc 380mm rear kit)• McLaren 540C / 570S / 570GT (with Girodisc D52-based systems)• BMW F8X M2 / M3 / M4 (with Girodisc 380mm retrofit kits)Always confirm your hat pattern and bolt circle match the D52 specification before ordering. Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) FAQs What is included with these replacement rings? The kit includes two 380x32mm iron rotor rings (left and right) along with all new hardware for installation. Can I reuse my existing aluminum hats? Yes. These replacement rings are designed to bolt directly to your Girodisc aluminum hats using the provided hardware. Are the rings directional? Yes. Each rotor has directional curved vanes—ensure left and right sides are installed correctly for proper cooling airflow. What materials are used? The rings are made from Girodisc’s proprietary cast iron alloy, known for high heat capacity, durability, and consistent friction performance. Do these fit OEM or other aftermarket hats? No. Girodisc replacement rings are engineered specifically for Girodisc hats and may not fit other brands’ hardware or bolt patterns. Are they sold individually or as a set? The Girodisc GD380.32.52 380x32mm Replacement Rotor Rings (D52) are sold and priced per pair, including all required installation hardware. Maintain peak braking performance with genuine Girodisc GD380.32.52 Replacement Rotor Rings (D52)—crafted in the USA for reliability, strength, and precision fitment.

Girodisc 380x35mm Replacement Rotor Rings (D52) Need new rings for your Brembo or StopTech big brake kit? Girodisc has you covered. These 380x35mm replacement rings are 100% plug-and-play with your existing aluminum hats, offering a perfect fit and race-proven performance. Each set includes new floating pin hardware for a complete refresh of your braking system. Vehicle Fitment These Girodisc 380x35mm replacement rings fit a variety of big brake kits using 380x35mm rotors, including systems from Brembo, StopTech, and other performance brands. Verify your original rotor size and hat configuration before ordering to ensure compatibility.Note: These are replacement friction rings only and must be installed on existing Girodisc or compatible aluminum hats using the included hardware. Precision Engineering, Made in the USA The rotor rings are machined from Girodisc’s proprietary high-carbon cast iron, poured and finished in-house in the USA. Each rotor utilizes 72 curved directional vanes, engineered to act as a centrifugal air pump that pulls cooling air through the disc to lower operating temperatures and prevent fade during extreme braking. Whether on the street or at the track, Girodisc ensures consistent braking, superior pedal feel, and unmatched thermal control. Features • Direct-fit replacement for 380x35mm Girodisc, Brembo, and StopTech applications• Includes two new floating hardware kits• 72 curved vanes for maximum cooling efficiency• Proprietary high-carbon iron for strength and crack resistance• Machined, balanced, and finished in the USA• Bolt-on installation with existing hats• Sold/priced per pair Specifications • Diameter: 380mm• Thickness: 35mm• Vane Count: 72 curved directional• Position: Front or rear, depending on application• Includes: Two rotor rings and two complete hardware kits• Made in the USA• Sold/priced per pair Girodisc GD380.35.52 Replacement Ring FAQs Will these fit my Brembo or StopTech big brake kit? Yes — these are a direct bolt-on for systems using 380x35mm rotors and compatible aluminum hats. Do the rings come with new hardware? Yes. Each pair includes two complete hardware kits with new floating pins, bolts, and washers. Do I need to buy new hats? Not unless your existing hats are damaged. Girodisc rings are designed for re-use with your current hats to save cost and installation time. Can these be used for track driving? Absolutely. Girodisc’s 72-vane cooling design and proprietary iron alloy make these ideal for high-heat track conditions and extended endurance use. Rebuild your Brembo or StopTech big brake kit with confidence using Girodisc GD380.35.52 380x35mm replacement rings — precision-built, track-tested, and proudly made in the USA.

Girodisc Porsche 986/987/996/997.1 Front Rotors The Girodisc system is a direct replacement for the OE disc with the addition of the included caliper spacers and longer bolts. This upgrade increases the rotor diameter from 317mm to 340mm, improving braking force, cooling capacity, and pedal feel. It’s a true bolt-on upgrade that retains your factory calipers and ABS function while reducing unsprung and rotational mass for quicker suspension response and acceleration. Lightweight, High-Performance 2-Piece Rotors The central hat section is machined from U.S.-sourced 6061-T6 aircraft-grade aluminum, while the rotor rings are Girodisc’s proprietary high-carbon cast iron. Each component is made in the USA and machined in-house for precision fitment and consistency. The rotors feature a curved vane design that acts as a centrifugal pump, drawing cooling air through the disc during use for superior heat management on both street and track. Girodisc A1-031 Features Upgrades OE 317mm discs to 340mm for greater thermal capacity and stopping power Floating mount system with 10 cadmium-plated steel drive pins for controlled float and quiet operation Reduces unsprung and rotational mass for sharper handling Fully serviceable—replace just the rotor rings when worn Includes caliper spacers and longer bolts for proper fitment Designed, cast, and machined in the USA Vehicle Fitment Works with factory calipers—no permanent modifications required. Includes caliper spacers and longer bolts. Porsche 986 Boxster S (2000–2004, all non-Big-Red applications) Porsche 987 Boxster / Cayman (2005–2012, non-S) Porsche 996 Carrera (1999–2004, non-Turbo / non-GT) Porsche 997.1 Carrera (2005–2008, non-S) Does not fit: 996/997 Turbo, GT3/GT2, PCCB/ceramic brake packages, or 997.2 models. Technical Specifications Diameter: 340mm (OE 317mm) Vane Design: Curved, directional Hat Material: 6061-T6 aluminum, black anodized Ring Material: High-carbon cast iron Hardware: 10 floating drive pins with Class 12.9 fasteners Sold/Price: Per pair Girodisc A1-031 FAQs Do I need different brake pads? No. These rotors retain the factory caliper and pad shape—just choose your preferred compound for street or track use. Will these make noise like race rotors? No. Girodisc’s spring washer hardware prevents the rattle commonly found in floating rotors while maintaining proper float for thermal expansion. Are the rings replaceable? Yes. The design allows you to replace only the iron rings and reuse the aluminum hats, saving long-term cost. Can I use these for track days? Absolutely. They’re engineered to handle repeated heat cycles without warping or cracking when paired with proper pads and fluid. Upgrade your Porsche braking system with precision-engineered Girodisc rotors. Order today and experience improved stopping performance and reduced weight.

Girodisc 350mm Porsche 996 / 991 / 992 Rear Rotors (with Spacers & Bolts) The Girodisc A2-032B Rear Rotor Kit is a premium direct-fit replacement for Porsche 996, 991, and 992 models. Engineered for high-performance driving, this system includes caliper spacers and longer bolts to accommodate the larger 350mm rotors. The result is improved braking torque, enhanced cooling efficiency, and reduced unsprung mass—all while retaining factory fitment and ABS calibration. Lightweight Design & Increased Performance Each Girodisc rotor assembly pairs a CNC-machined 6061-T6 aluminum hat with a proprietary cast iron disc. The 2-piece design significantly reduces rotational mass compared to OEM rotors, improving suspension response and acceleration. The curved vane design acts as a centrifugal pump, drawing air through the rotor to enhance cooling and resist fade under extreme braking conditions. Precision Floating Mount System The rotors feature Girodisc’s race-proven floating mount design with 10 cadmium-plated steel drive pins connecting the iron ring to the aluminum hat. These pins allow the disc to expand radially under high temperatures without warping, ensuring consistent pad contact. Anti-noise spring washers eliminate rattle, maintaining quiet operation suitable for street and track use alike. Girodisc A2-032B 350mm 2pc Porsche Rear Rotor Vehicle Fitment Porsche 996 Carrera / Carrera 4 / Carrera 4S Porsche 991 Carrera / Carrera 4 / Carrera GTS (Base models require S/4S/GTS rear pad shape for full rotor sweep) Porsche 992 Carrera / Carrera S / Carrera 4S Direct bolt-on installation with supplied spacers and hardware Technical Specifications CMS Number: A2-032B Position: Rear Rotor Diameter: 350mm (includes caliper spacers & longer bolts) Design: 2-piece floating rotor assembly Material: Proprietary cast iron with 6061-T6 aluminum hat Vane Design: Curved directional vanes for improved airflow Hardware: Cadmium-plated steel drive pins, class 12.9 screws, anti-noise washers Rebuildable: Yes — replace rotor rings, reuse aluminum hats Sold/Price: Per pair Girodisc A2-032B 350mm 2pc Porsche Rear Rotor FAQs Do these rotors fit all Porsche 996, 991, and 992 models? Yes. However, 991 base Carrera models must use the S/4S/GTS rear pad shape for full pad sweep. What is included with this kit? Each kit includes two 350mm rotors, caliper spacers, and longer mounting bolts for a complete direct installation. Are modifications required? No. The supplied hardware makes this a true bolt-on upgrade using factory calipers and lines. What are the main benefits over stock rotors? Improved cooling, reduced weight, better pedal response, and replaceable rings for long-term cost savings. Upgrade your Porsche’s braking system with the Girodisc A2-032B Rear Rotor Kit. Experience reduced fade, sharper braking response, and long-term durability whether on the street or at the track.

D1-224 Girodisc Alfa Romeo Giulia, Stelvio QV Front Replacement Rings Enhance the precision and consistency of your Alfa Romeo Quadrifoglio’s braking system with Girodisc D1-224 380 mm front replacement rings. These high-performance rings bolt directly to your existing Girodisc aluminum hats using the included floating hardware kit. Cast from Girodisc’s proprietary high-carbon iron alloy, they deliver excellent heat management, reduced fade, and consistent pedal feel during aggressive street or track driving. Vehicle Fitment Compatible with:• Alfa Romeo Giulia Quadrifoglio (2017+) – front axle• Alfa Romeo Stelvio Quadrifoglio (2018+) – front axleNote: Designed exclusively for Girodisc 380 mm two-piece front rotor systems. Not compatible with OEM one-piece or carbon-ceramic rotors. Features • Sold as a left/right pair with complete floating hardware kit• Direct replacements for Girodisc 380 mm two-piece front rotors• CNC-machined from high-carbon cast iron for durability and thermal stability• Directional curved vanes maximize airflow and heat dissipation• Maintains factory brake bias and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 380 mm• Position: Front• Material: High-carbon cast iron• Mount type: Floating two-piece system• Includes: Two rotor rings and new hardware kit• Sold/priced per pair Girodisc D1-224 Alfa Romeo Giulia / Stelvio QV Front Replacement Ring FAQs Are these compatible with the factory carbon-ceramic brake option? No. The D1-224 rings are designed for steel Girodisc two-piece systems only and will not fit the OEM carbon-ceramic setup. Will these rings change pedal feel or braking balance? Not at all. They maintain factory brake bias and deliver a firmer, more consistent pedal feel thanks to the floating rotor design. Can I use these for both daily driving and track days? Yes. They’re quiet and smooth on the street but engineered to handle repeated high-temperature stops during spirited or track use. Do these require special installation or bedding procedures? Standard bedding is recommended — gradually heating the pads and rotors through a few controlled stops ensures even pad transfer and optimal braking performance. Upgrade your Alfa Romeo Giulia or Stelvio Quadrifoglio with Girodisc D1-224 380 mm front replacement rings — precision-engineered for cooling, longevity, and repeatable braking performance on road or track.

D2-159 Girodisc McLaren 380mm Rear Replacement Rings Refresh the braking performance of your McLaren with Girodisc D2-159 380mm rear replacement rings. These are direct-fit replacements for Girodisc two-piece rear rotors, designed to bolt to your existing aluminum hats using the included floating hardware kit. Replace only the wear surface and maintain your lightweight, high-performance Girodisc setup. Vehicle Fitment Compatible with:• McLaren MP4-12C (rear)• McLaren 570S / 570GT (rear)• McLaren 650S (rear)• McLaren 675LT (rear)• McLaren 720S (rear)Note: For vehicles equipped with Girodisc 380mm two-piece rear rotor systems. Not compatible with OEM or carbon-ceramic rotors. Features • Sold as a left/right pair and includes full hardware kit• Direct replacements for Girodisc 380mm two-piece rear rotors• CNC-machined from high-carbon cast iron for superior heat control• Curved directional vanes increase cooling efficiency• Maintains OEM brake balance and ABS calibration• Designed exclusively for Girodisc aluminum hats – not compatible with OEM or other brands Specifications • Diameter: 380mm• 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 D2-159 Replacement Ring FAQs Will these fit OEM McLaren rotors? No. These are made specifically for Girodisc two-piece rotor hats and will not fit factory or carbon-ceramic assemblies. Are both sides included? Yes. Each D2-159 kit includes both left and right replacement rings plus a complete hardware kit. Why replace just the rings instead of the full rotor? It saves cost, retains your Girodisc hats, and restores performance without replacing the full assembly. Can I reuse the old hardware? No. Always install the new floating hardware included in the kit for proper fitment and long-term safety. Upgrade your McLaren’s braking performance with Girodisc D2-159 380mm rear replacement rings — engineered for durability, heat control, and consistent stopping power on both street and track.

355x35mm Replacement Rotor Rings (D52) When your Girodisc rotors reach the end of their service life, these Girodisc GD355.35.52 Replacement Rings are the perfect refresh. Designed for the D52 series 355x35mm two-piece rotor assemblies, this replacement set restores the braking performance and precision Girodisc is known for—without replacing your original aluminum hats. Manufactured in the USA from Girodisc’s proprietary high-carbon cast iron alloy, these rotor rings deliver outstanding thermal capacity, reduced brake fade, and the durability demanded by high-performance driving and track use. They’re a direct bolt-on replacement using your existing Girodisc hats, saving cost while maintaining full performance and reliability. Features and Benefits Direct replacements for Girodisc D52 355x35mm two-piece rotors Machined from proprietary high-carbon cast iron for superior heat resistance 48 curved directional vanes maximize airflow for consistent cooling Balanced and matched to OEM tolerances for vibration-free braking Includes all new drive pins, bolts, and washers Lightweight design minimizes unsprung mass while maximizing stopping power Made and machined entirely in the USA Compatibility Designed exclusively for Girodisc D52 355x35mm rotor assemblies. These rings are only compatible with Girodisc aluminum hats. They are not designed to fit OEM or other aftermarket two-piece rotor systems. Why Choose Girodisc Girodisc rotors are precision-engineered to perform under the most demanding conditions. Every component is CAD-modeled, CNC-machined, and track-tested to deliver exceptional performance, fade resistance, and thermal stability. When it’s time to refresh your setup, Girodisc replacement rings give you the braking feel and control of a brand-new system—without the added cost of new hats. FAQs Do these include the aluminum hats?No. The GD355.35.52 kit includes only the rotor rings and new hardware. Your existing Girodisc hats are reused. Are these compatible with OEM rotors?No. Girodisc replacement rings are engineered specifically for Girodisc hats and will not fit OEM or other aftermarket rotor systems. What’s included in the box?A pair of 355x35mm rotor rings (left and right) and a complete hardware kit including drive pins, bolts, and washers. Are these rotors directional?Yes. Each ring features curved internal vanes optimized for airflow and cooling. Be sure to install them on the correct sides for maximum performance. Ready to Refresh Your Brakes? Restore your Girodisc system to peak performance with the GD355.35.52 355x35mm Replacement Rings. Designed for precision, strength, and cooling efficiency, they’re the ultimate choice for maintaining the world-class braking feel you expect from Girodisc. Order your set today from Competition Motorsport and get back to braking perfection.

380x34mm Replacement Rings for Brembo Wide Annulus (D62) Renew your Brembo big brake kit’s stopping performance with the Girodisc GD380.34.62BR Replacement Rings. Designed as a direct replacement for 380x34mm Brembo wide annulus two-piece rotors, these precision-machined rings deliver exceptional thermal stability, strength, and fade resistance under demanding street or track use. Manufactured in the USA from Girodisc’s proprietary high-carbon cast iron alloy, each ring is engineered to handle high heat cycles and extreme braking forces without distortion or cracking. The D62 wide annulus design matches Brembo’s 62mm pad contact area, ensuring maximum pad engagement and consistent braking performance lap after lap. Features and Benefits Direct replacement rings for 380x34mm Brembo big brake kits using a 62mm wide annulus pad Bolts directly to existing Brembo aluminum hats using original hardware Machined from proprietary U.S.-poured high-carbon cast iron for superior heat capacity 48 curved directional vanes maximize airflow and cooling efficiency Lightweight two-piece floating design reduces unsprung weight and improves brake response Fully machined, balanced, and assembled in the USA Hardware Information These rings bolt to the existing Brembo hats using the factory hardware. New hardware is not included with this set but can be sourced if your existing fasteners show wear or damage. Compatibility Fits Brembo big brake kits featuring 380x34mm rotors with a 62mm wide annulus pad design. Compatible with both street and track-oriented Brembo systems using two-piece floating rotor assemblies. Why Choose Girodisc Girodisc combines racing heritage with cutting-edge engineering to deliver replacement components that outperform OEM parts. The GD380.34.62BR rings restore your Brembo system’s braking precision and consistency while maintaining the lightweight performance benefits of your existing hats. Each ring is heat-treated and balanced for dependable, fade-free performance under extreme braking conditions. FAQs Do these include the aluminum hats?No. The GD380.34.62BR kit includes only the rotor rings. You will reuse your existing Brembo hats. Is hardware included?No. These rings bolt to your Brembo hats using your existing hardware. Replacement hardware can be ordered separately if needed. Are these compatible with OEM rotors?No. These are designed exclusively for 380x34mm Brembo big brake kits using a 62mm wide annulus pad and will not fit OEM one-piece rotors. Are they directional?Yes. Each ring features curved internal vanes and must be installed on the correct side for optimal cooling and airflow. Ready to Refresh? When it’s time to restore the braking precision of your Brembo big brake kit, the Girodisc GD380.34.62BR 380x34mm Replacement Rings deliver the performance, durability, and cooling efficiency you expect. Order your set today from Competition Motorsport and get your system back to race-ready perfection.

Lotus Emira Rear Caliper Rebuild Kit Been to a few too many track days? If your rear calipers are feeling sticky or weak, this kit replaces the hard-worked piston seals and dust boots to get them operating like new. Fitment Lotus Emira rear caliper. If you are unsure about compatibility, compare your caliper’s piston count and dimensions to your factory service information. Refresh your rear braking performance with a precise, track-tested kit Each kit services one front caliper and includes new piston seals and high-temperature dust boots built to our spec. Pair rebuilt calipers with titanium pad shields to reduce heat transfer and extend service intervals. CCRK2-388 Features One kit services one front caliper Includes piston seals and dust boots made to our specifications Designed to withstand high brake temperatures common on track Restores caliper feel, consistency, and pad release Recommended with titanium pad shields for added heat protection What’s included Piston seals and dust boots sufficient to rebuild one Lotus Emira rear brake caliper. Fitment Lotus Emira front caliper. If you are unsure about compatibility, compare your caliper’s piston count and dimensions to your factory service information. Installation notes Clean all components thoroughly; avoid scratching piston surfaces Use appropriate brake assembly lube and fresh DOT-rated brake fluid specified by the vehicle manufacturer After assembly, bleed the system and verify a firm, consistent pedal Follow torque specs and procedures in the factory service manual Lotus Emira Front Caliper Rebuild Kit CCRK2-388 FAQs Does one kit cover both front calipers? No. One kit services one caliper. Order two kits to service both rear calipers. How do I know my caliper seals need replacement? Common signs include uneven pad wear, dragging brakes, fluid seepage, a soft pedal, or pistons that don’t retract smoothly after braking. Can I install this at home? Experienced DIYers can rebuild calipers with the right tools and a service manual. If you are unsure, consult a professional technician. Do I need new brake fluid after the rebuild? Yes. Always use fresh fluid that meets the manufacturer’s specification and fully bleed the system after service. Will titanium pad shields really help? They reduce heat transfer from pads to pistons, helping protect seals and fluid, especially during repeated high-temperature track use. Ready to restore consistent braking performance? Add the Lotus Emira Rear Caliper Rebuild Kit to your cart, and consider titanium pad shields to keep your system cooler on track.

Lotus Emira Rear Caliper Rebuild Kit Been to a few too many track days? If your rear calipers are feeling sticky or weak, this kit replaces the hard-worked piston seals and dust boots to get them operating like new. Fitment Lotus Emira rear caliper. If you are unsure about compatibility, compare your caliper’s piston count and dimensions to your factory service information. Refresh your rear braking performance with a precise, track-tested kit Each kit services one rear caliper and includes new piston seals and high-temperature dust boots built to our spec. Pair rebuilt calipers with titanium pad shields to reduce heat transfer and extend service intervals. CCRK2-388 Features One kit services one rear caliper Includes piston seals and dust boots made to our specifications Designed to withstand high brake temperatures common on track Restores caliper feel, consistency, and pad release Recommended with titanium pad shields for added heat protection What’s included Piston seals and dust boots sufficient to rebuild one Lotus Emira rear brake caliper. Fitment Lotus Emira rear caliper. If you are unsure about compatibility, compare your caliper’s piston count and dimensions to your factory service information. Installation notes Clean all components thoroughly; avoid scratching piston surfaces Use appropriate brake assembly lube and fresh DOT-rated brake fluid specified by the vehicle manufacturer After assembly, bleed the system and verify a firm, consistent pedal Follow torque specs and procedures in the factory service manual Lotus Emira Rear Caliper Rebuild Kit CCRK2-388 FAQs Does one kit cover both rear calipers? No. One kit services one caliper. Order two kits to service both rear calipers. How do I know my caliper seals need replacement? Common signs include uneven pad wear, dragging brakes, fluid seepage, a soft pedal, or pistons that don’t retract smoothly after braking. Can I install this at home? Experienced DIYers can rebuild calipers with the right tools and a service manual. If you are unsure, consult a professional technician. Do I need new brake fluid after the rebuild? Yes. Always use fresh fluid that meets the manufacturer’s specification and fully bleed the system after service. Will titanium pad shields really help? They reduce heat transfer from pads to pistons, helping protect seals and fluid, especially during repeated high-temperature track use. Ready to restore consistent braking performance? Add the Lotus Emira Rear Caliper Rebuild Kit to your cart, and consider titanium pad shields to keep your system cooler on track.