Racing Brake Rotors

Girodisc 2-Piece Rear Brake Rotors – GT4 Clubsport The Girodisc A2-266 rear rotor set is a direct, bolt-on replacement for the OE cup car disc on the GT4 Clubsport platform. Using a lightweight aluminum hat and a proprietary cast-iron ring, these two-piece rotors reduce unsprung weight, improve cooling, and deliver repeatable performance under heavy track use while working perfectly with factory calipers and ABS. Race-bred construction, bolt-on simplicity Each rotor features a curved-vane internal design that pumps cooling air through the disc, managing temperatures during long stints. The floating mount uses high-strength alloy steel drive pins and anti-noise spring washers to allow axial and radial float, letting the ring expand with heat and self-center between the pads for consistent pedal feel. Features • Direct replacement for OE GT4 Clubsport rear discs• Two-piece design: proprietary cast-iron rings with 6061-T6 aluminum hats (U.S. sourced)• Curved-vane internal geometry for superior cooling• Floating drive-pin system with cadmium-plated hardware and class 12.9 cap screws• Anti-noise spring washers minimize rattle while allowing thermal growth• Reduced unsprung and rotational mass for sharper response• Rings are replaceable; reuse hats when the rings wear out• Sold/priced per pair Vehicle Fitment • Porsche Cayman GT4 Clubsport (981) – rear• Porsche 718 Cayman GT4 Clubsport (982) – rear• Note: If your car is equipped with OEM center-lock wheels, select the center-lock drive pin option. Girodisc A2-266 Rear Rotors – GT4 Clubsport FAQs Do these rotors fit with the stock calipers and ABS? Yes. They bolt on with no modifications and maintain factory brake bias and ABS functionality. What is the benefit of the two-piece floating design? It reduces weight, improves cooling, and allows the iron ring to expand under heat without coning or cracking, maintaining a consistent pedal with fewer hot spots. Are replacement rings available? Yes. When the rings are worn, simply replace the cast-iron rings and reuse the aluminum hats and hardware where applicable. How many drive pins are used? The A2-266 utilizes a high-strength floating system with multiple alloy steel pins and anti-noise spring washers to allow controlled float and quiet operation. Are these sold individually or as a set? Sold/priced per pair for the rear axle. What pads and fluid do you recommend? Pairing performance pads with a quality high-temperature fluid completes a reliable track package and helps prevent fade under extended use. Upgrade the rear brakes on your GT4 Clubsport with Girodisc A2-266 two-piece rotors for lighter weight, cooler running, and confidence-inspiring consistency every session.

Girodisc Dodge Viper TA Rear Rotors The Girodisc A2-270 Rear Rotor Kit is a lightweight, performance-engineered brake upgrade for the Dodge Viper TA. Designed to replace the factory rotors directly with no modifications, these 2-piece, fully floating assemblies deliver improved cooling, reduced unsprung weight, and increased responsiveness under hard braking. Lightweight 2-Piece Construction Each Girodisc assembly combines a CNC-machined 6061-T6 aluminum hat with a proprietary high-carbon cast iron rotor ring. The 2-piece floating configuration significantly reduces rotating mass and unsprung weight, resulting in better suspension response, sharper handling, and faster acceleration. These rotors provide superior heat dissipation and a firmer, more consistent brake pedal feel on both street and track. Race-Proven Floating Mount System Girodisc’s advanced floating mount system connects the rotor ring and hat using precision-engineered, cadmium-plated steel drive pins. These pins are secured with grade 12.9 cap screws and hardened washers, allowing the rotors to expand and contract under heat while maintaining axial and radial float. Anti-noise spring washers prevent rattle and ensure quiet operation for street driving. Vehicle Fitment Dodge Viper TA (Time Attack) Compatible with OEM calipers and pads Direct bolt-on installation — no modifications required Technical Specifications CMS Number: A2-270 Position: Rear Design: 2-piece floating rotor Material: Proprietary cast iron rotor with 6061-T6 aluminum hat Vane Design: Curved internal vanes for enhanced cooling Hardware: Cadmium-plated drive pins, class 12.9 screws, anti-noise washers Rebuildable: Yes — replaceable iron rings, reusable aluminum hats Sold/Price: Per pair FAQs for Girodisc A2-270 Are these rotors a direct replacement for my OEM setup? Yes, the Girodisc A2-270 rotors are a direct bolt-on replacement for the factory Viper TA rotors and work perfectly with OEM calipers. What advantages do Girodisc rotors offer? They provide superior cooling, reduced weight, and improved pedal consistency for both track and street driving. Can I replace the rings later? Yes, Girodisc rotors are fully rebuildable—simply replace the iron rotor rings when worn and reuse the aluminum hats. Do these rotors make noise? No. The anti-noise spring washers eliminate rattling while maintaining the benefits of a fully floating rotor system. Upgrade your Dodge Viper TA with Girodisc A2-270 Rear Rotors to experience track-proven braking performance, reduced weight, and long-term serviceability—all proudly engineered and manufactured in the USA.

Girodisc Chevrolet Camaro SS (6th Gen) Rear Rotors The Girodisc A2-271 Rear Rotors are a precision-engineered, direct replacement for the OEM discs on the sixth-generation Chevrolet Camaro SS. Designed to enhance braking performance, reduce weight, and improve cooling, these 2-piece floating rotors deliver track-ready reliability and street-friendly refinement—all while retaining factory fitment and ABS function. Lightweight Construction & Improved Cooling By upgrading to Girodisc’s two-piece rotor design, you eliminate unnecessary rotational mass. The lightweight 6061-T6 aluminum hat significantly reduces unsprung weight, improving suspension response and acceleration. The cast-iron outer rings are produced from Girodisc’s proprietary high-carbon alloy, featuring curved internal vanes that act as a centrifugal pump to draw cooling air through the rotor—perfect for high-performance driving and track sessions. Race-Grade Floating Mount System The rotors utilize a fully floating mount system that connects the rotor ring to the hat via 10 high-strength alloy steel drive pins. Each pin is cadmium-plated for corrosion resistance and secured with class 12.9 cap screws and hardened washers. Girodisc incorporates anti-noise spring washers to allow thermal expansion while maintaining a rattle-free, quiet operation suitable for both street and track use. Vehicle Fitment Chevrolet Camaro SS (6th Generation, 2016+) Compatible with factory rear calipers No modifications required — direct bolt-on replacement Technical Specifications CMS Number: A2-271 Position: Rear Design: 2-piece floating rotor Material: High-carbon cast iron ring with 6061-T6 aluminum hat Vane Design: Curved directional vanes Hardware: Cadmium-plated steel drive pins, class 12.9 cap screws Rebuildable: Yes — replace the rotor rings, reuse the hats Sold/Price: Per pair FAQs for the Girodisc A2-271 Are these rotors a direct fit? Yes, the Girodisc A2-271 rear rotors are a direct bolt-on replacement using the OEM calipers and hardware—no modifications needed. Do they improve braking performance? Absolutely. The reduced rotational mass improves throttle response and suspension compliance, while the curved vanes enhance cooling and fade resistance. Are they noisy? No. The floating hardware design uses anti-noise spring washers to eliminate rattle and vibration during street driving. Are these rotors rebuildable? Yes. The rotor rings can be replaced independently, allowing cost-effective rebuilds and extended service life. Upgrade your Chevrolet Camaro SS (6th Gen) with Girodisc’s lightweight, performance-engineered rear rotors for improved stopping power, cooling efficiency, and long-term value.

A2-272 Girodisc Porsche 992 GT3, 718 GT4 RS Rear Rotors Direct‑replacement 2‑piece rear rotors for the 992 GT3/GT3RS and 718 GT4 RS. Bolt‑on fit with factory calipers and pads; floating design controls heat and mass for consistent performance. A2-272 Girodisc Porsche Rear Rotor Vehicle Fitment Porsche 992 GT3/GT3RS – Rear (OEM iron brake cars) Porsche 718 Cayman GT4 RS – Rear Design & Cooling High‑carbon iron rings with curved vanes improve airflow and heat capacity. 6061‑T6 aluminum hats are reusable; spring‑preloaded hardware manages thermal growth while minimizing noise. A2-272 Girodisc Porsche Rear Rotor Features Direct OE replacement; no modifications required 2‑piece floating construction Reusable hats; ring‑only service Sold/priced per pair

Girodisc Ferrari Portofino / Roma Rear Iron Rotor Conversion The Girodisc A2-278 Rear Iron Rotor Conversion is engineered to replace the factory rear rotors on Ferrari Portofino and Roma models, offering a robust, high-performance iron alternative built for track use and aggressive street driving. This system integrates seamlessly with the OEM brake setup while providing enhanced durability, cooling, and serviceability. Design & Engineering Each rotor merges a 6061-T6 aluminum hat with a proprietary high-carbon cast iron ring, produced and polished in-house. This 2-piece floating configuration allows thermal expansion without distortion. The rotor’s 48 curved vanes act as an internal centrifugal pump, pulling air inward from the hub to cool the disc efficiently under repeated demands. The floating mount system uses cadmium-plated steel drive pins in concert with Belleville washers and spring clips to maintain pad alignment, prevent rattle, and allow precise rotational movement. This ensures quiet operation during street use while retaining full racing capability. Vehicle Fitment Ferrari Portofino (non-CCM models) Ferrari Roma (excluding carbon ceramic brake variants) Technical Specifications Part Number: A2-278 Position: Rear Material: High-carbon cast iron rotor ring with aluminum hat Vane Count: 48 curved directional vanes Hardware: Cadmium-plated steel drive pins, Belleville washers, spring clips Rebuildable: Replace rotor rings while reusing hats and hardware Sold/Price: Per pair Advantages Improved thermal capacity over OEM cast rotors Reduced replacement cost compared to carbon ceramic systems Floating design maintains brake consistency and pad centering Quiet operation with no rattle in street use Precision-engineered and manufactured in the USA FAQs for Girodisc A2-278 Does this require modifications? No. It’s a direct fit replacement for non-CCM Portofino and Roma rears. Is this suitable for track use? Yes. The conversion is designed to handle elevated heat and repeated high-load braking cycles. Can I replace only the iron rings? Yes. Replacement rotor rings are available for long-term maintenance without replacing the aluminum hats. Upgrade your Ferrari Portofino or Roma with Girodisc’s rear iron rotor conversion—premium cooling, lower operating cost, and consistent brake performance.

Girodisc BMW G8X M2, M3, M4 Rear Rotors Girodisc A2-282 2-piece rear rotors are a direct bolt-on for G87 M2, G80/G81 M3, and G82/G83 M4 without carbon ceramic brakes. Floating construction reduces unsprung/rotational mass and improves heat management while preserving OE parking brake and ABS. Vehicle Fitment BMW G87 M2 (non-CCB) – Rear BMW G80/G81 M3 (non-CCB) – Rear BMW G82/G83 M4 (non-CCB) – Rear Curved-Vane Cooling, Street-Friendly Float High-carbon rings with 48 curved vanes act as a centrifugal pump to pull air through the disc. Reusable 6061-T6 hats and spring-preloaded hardware control thermal growth and minimize rattle. Features Direct OE replacement for 370 mm rear rotors (non-CCB) 2-piece floating design reduces unsprung weight High-carbon iron rings; reusable aluminum hats 48 curved vanes for effective cooling Cadmium-plated high-strength drive pins; Belleville washers Manufactured and assembled in Bellingham, WA Sold/priced per pair Girodisc A2-282 FAQs Minimum service thickness? Replace rear rings at 22 mm or sooner if a crack reaches the edge. Parking brake compatibility? Fully compatible; hat offset maintains OE parking brake operation. Which rings match later? D2-282 rear replacement rings. Any coding or extra parts? No — this is a bolt-on rotor upgrade with OE calipers. Related Products D2-282 Girodisc BMW G8X 370mm Rear Replacement Rings A1-282 Girodisc BMW G8X M2, M3, M4 380mm Front Rotors D1-282 Girodisc BMW G8X 380mm Front Replacement Rings

Girodisc Porsche 992 GT3 Cup Rear Rotors These Girodisc A2-287 2-piece rear rotors match the front A1-287 kit for the Porsche 992 GT3 Cup iron-brake configuration. Floating assemblies reduce unsprung mass and maintain factory braking balance. A2-287 Girodisc Porsche 992 GT3 Cup Rear Rotors Porsche 992 GT3 Cup – Rear (iron brakes) Durable Rings & Floating Hardware High‑carbon iron rings with curved vanes improve thermal stability and airflow. Reusable aluminum hats and spring‑preloaded hardware provide controlled float with street‑friendly noise characteristics. A2-287 Girodisc Porsche 992 GT3 Cup Rear Rotor Features Direct bolt‑on; uses OEM calipers 2‑piece floating construction 6061‑T6 hats; cadmium‑plated hardware Manufactured and assembled in Bellingham, WA Sold/priced per pair

A2-302 Girodisc Lamborghini Huracán STO Rear Iron Rotor Conversion These Girodisc A2-302 2-piece rotors directly replace the factory carbon-ceramic rears on the Huracán STO. They retain the OEM calipers; pad shape is unchanged, but use an iron-appropriate compound. Vehicle Fitment 2021+ Lamborghini Huracán STO (rear, CCB-equipped) Curved-Vane Cooling High-carbon iron rings with 48 curved vanes act as a centrifugal pump to move cooling air through the disc. Spring-preloaded hardware allows thermal growth without rattle. Girodisc A2-302 Features Direct CCB-to-iron conversion; OEM calipers retained 2-piece floating construction reduces unsprung/rotational mass Reusable 6061-T6 aluminum hats; cadmium-plated pins Manufactured and assembled in Bellingham, WA Sold/priced per pair  FAQs Which pads do I need? Same rear pad shape as OEM, but choose an iron-rotor compound. Minimum thickness? Replace rear rings at 26 mm or sooner if a crack reaches the edge. Any changes to parking brake? No — dimensions maintain OEM parking brake function. Related Products D2-302 Girodisc Lamborghini Huracán STO Rear Replacement Rings A1-302 Girodisc Lamborghini Huracán STO Front Iron Rotor Conversion D1-302 Girodisc Lamborghini Huracán STO Front Replacement Rings

Girodisc Toyota , BMW Rear Brake Rotors  These Girodisc A2-307 2-piece rear rotors directly replace the 345 mm rear rotor package on Toyota GR Supra 3.0 and select BMW G-chassis models. Floating construction reduces rotating mass and improves cooling while maintaining OE parking brake and ABS.  Vehicle Fitment Toyota GR Supra 3.0 (A90/A91) – Rear BMW G20/G21 M340i – Rear BMW G22/G23 M440i – Rear BMW G20/G22 with optional M Sport brakes – Rear BMW G01 X3 M40i & G02 X4 M40i – Rear BMW G29 Z4 M40i – Rear Applies to vehicles equipped with the 345 mm rear rotor package. Curved-Vane Cooling High-carbon iron rings with 48 curved vanes act as a centrifugal pump to move air through the disc. Reusable hats and spring-preloaded floating hardware allow thermal expansion without rattle for street use. Girodisc A2-307 Features Direct OE replacement; no modifications required 2-piece floating construction reduces unsprung/rotational mass High-carbon iron rings; reusable 6061-T6 aluminum hats 48-vane internal geometry for airflow and cooling Manufactured and assembled in Bellingham, WA Sold/priced per pair FAQs for the Girodisc A2-307 Minimum service thickness? Replace rear rings at 22 mm or sooner if a crack reaches the edge. Parking brake and shields? Retained — dimensions keep OE parking brake function and shield clearances. Related Products D2-307 Girodisc Toyota GR Supra, BMW 345mm Rear Replacement Rings A1-307 Girodisc Toyota GR Supra, BMW 348mm Front Rotors D1-307 Girodisc Toyota GR Supra, BMW 348mm Front Replacement Rings

Girodisc Cadillac CT4-V Blackwing Rear Rotors These Girodisc A2-318 2-piece rear rotors are a direct bolt-on for the CT4-V Blackwing, preserving parking brake function and ABS while reducing rotating mass and improving heat rejection compared to 1-piece rotors. A2-318 Vehicle Fitment Cadillac CT4-V Blackwing – Rear Efficient Cooling & Quiet Operation High-carbon iron rings with curved vanes act as a centrifugal pump to move air through the disc. Reusable 6061-T6 hats and spring-preloaded floating hardware allow thermal expansion without the rattle typical of loose floating setups. Features Direct OE replacement; no modifications required 2-piece floating construction reduces unsprung/rotational mass Curved vane internal geometry for airflow and cooling Reusable aluminum hats; cadmium-plated high-strength pins Manufactured and assembled in Bellingham, WA Sold/priced per pair A2-318 Girodisc Cadillac CT4-V Blackwing Rear Rotors FAQs Minimum service thickness? Girodisc recommends replacing rear rings at 26 mm or sooner if a crack reaches the ring edge. Are dust shields or parking brake affected? No — dimensions maintain OE parking brake function and shield clearances. Will these change brake balance? No — they retain OEM geometry and bias. Which rear rings match? Use D2-318 rear replacement rings. Related Products A1-318 Girodisc Cadillac CT4-V Blackwing Front Rotors D1-066 Girodisc 380×34 Front Replacement Rings D2-318 Girodisc Cadillac CT4-V Blackwing Rear Replacement Rings

A2-319 Girodisc Corvette C8 Z06, E-Ray Rear Rotors These Girodisc A2-319 2-piece rear rotors are a direct replacement for the factory rear rotors on the Corvette C8 Z06 and E-Ray. The floating two-piece construction improves cooling and reduces unsprung weight while maintaining street manners. Vehicle Fitment Chevrolet Corvette C8 Z06 (Rear) Chevrolet Corvette C8 E-Ray (Rear) Serviceable Two-Piece Rear Rotors High-carbon iron rings deliver stable braking under heat, while reusable aluminum hats lower long-term service costs. The 48 curved vane design acts like a centrifugal pump to draw air through the rotor and dissipate heat efficiently. Features Direct OEM replacement for C8 Z06 and E-Ray (rear) 2-piece floating rotor design reduces unsprung weight High-carbon iron rings for consistent performance 48 curved vanes for effective cooling Reusable aluminum hats Manufactured and assembled in Bellingham, WA A2-319 Girodisc Corvette C8 Z06, E-Ray Rear Rotors FAQs: Do these fit with OEM calipers? Yes, they bolt on and work with stock calipers. Are they noisy? No, the floating hardware is engineered for quiet street use. Can I replace just the rings later? Yes, use D2-319 rear replacement rings. Are they track-capable? Yes, they are designed for repeated heat cycles and performance driving. Related Products A1-320 Girodisc Corvette C8 Z06, E-Ray Front Iron Rotor Conversion A2-319 Girodisc Corvette C8 Z06, E-Ray Rear Rotors D1-320 Girodisc Corvette C8 398mm Front Replacement Rings D2-319 Girodisc Corvette C8 Z06, E-Ray Rear Replacement Rings

Girodisc BMW G8X M3, M4 Rear Iron Rotor Conversion These Girodisc A2-322 2-piece rotors convert the rear 380 mm CCB setup on G8X M3/M4 to high-carbon iron while retaining the OEM CCB calipers. No permanent mods — swap rotors and run the factory iron pad shape for the rear calipers. Vehicle Fitment BMW G80/G81 M3 with CCB – Rear BMW G82/G83 M4 with CCB – Rear Built for Heat, Quiet on the Street High-carbon iron rings with curved vanes act as a centrifugal pump to move air through the disc for consistent temperatures. Spring-preloaded floating hardware allows thermal growth without the rattle of loose float systems. Features Direct CCB-to-iron conversion; no coding required 2-piece floating construction reduces unsprung/rotational mass Curved-vane rings for efficient cooling Reusable aluminum hats; cadmium-plated pins Manufactured and assembled in Bellingham, WA Sold/priced per pair Girodisc A2-322 FAQs Which pads do I need? Use the factory iron rear pad shape for the G8X CCB calipers. Parking brake compatibility? Fully compatible; the hat offset maintains OE parking brake operation. Rear rotor size with this kit? 380 mm, matching the CCB system diameter. Minimum service thickness? Replace rear rings at 26 mm or sooner if a crack reaches the ring edge. Related Products D2-322 Girodisc BMW G8X Iron Conversion Rear Replacement Rings A1-322 Girodisc BMW G8X M3, M4 Front Iron Rotor Conversion D1-220 Girodisc BMW F8X/G8X 400mm Front Replacement Rings

A2-324 Girodisc Chevrolet Corvette C5/C6 Z51 Rear Rotors These Girodisc 2-piece floating rear rotors are a direct replacement for the C6 Z51 330mm rear rotor (J55 “heavy-duty” package). Weighing just 12.4 lb per rotor, they shed unsprung weight and rotating mass for sharper suspension response and consistent stopping power. Race-Bred Construction High-carbon iron rings: Proprietary Girodisc metallurgy for stability under repeated heat cycles. 48 curved directional vanes: Internal pump action pulls cooling air through the rotor for superior heat rejection. 6061-T6 aluminum hats: Black anodized for corrosion resistance and reduced mass. Floating hardware: Cadmium-plated high-strength steel drive pins with Belleville washers & spring clips for quiet, street-friendly float. Rebuildable design: Replace rings with Girodisc D2-324 when worn—reuse the hats and hardware. Vehicle Fitment Chevrolet Corvette C6 with Z51 (J55) rear brakes Chevrolet Corvette C5 & C6 base (with Z51 rear caliper bracket GM #88964167 or equivalent) Technical Specifications SKU: A2-324 Position: Rear Diameter: 330 mm Thickness: 26 mm (minimum 24 mm) Weight: 12.4 lb per rotor assembly Vane Design: 48 curved directional Ring Part # (replacements): D2-324 Sold/Price: Per pair Fitment Note: These C6 Z51 rotors can be used on C5 and C6 base cars with the Z51 rear caliper bracket (GM #88964167) or equivalent. The bracket works with the existing calipers and these rotors to complete the conversion to the Z51 brake package. Why Upgrade to Girodisc? Compared to one-piece OE rotors, Girodisc 2-piece assemblies reduce unsprung mass, improve cooling, and resist cracking/warping under track heat. The floating mount maintains pad alignment and helps the rotor self-center between the pads for consistent pedal feel. Replace rings at or before the 24 mm minimum or if any crack reaches the edge of the ring.

Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Rear Rotors These Girodisc 2-piece rotors are a direct replacement for the Nissan R32 V-Spec, R33, and R34 Skyline GT-R rear brakes. Fitment note: these rotors require the backing plates on the rear pads to be trimmed flush to the pad material. Please contact us if you have any questions or if you would like to buy pre-trimmed pads. Vehicle Fitment • Nissan Skyline GT-R R32 V-Spec (Rear)• Nissan Skyline GT-R R33 (All models – Rear)• Nissan Skyline GT-R R34 (All models – Rear) Lightweight, Race-Ready Rotor Assemblies Weighing in at 15.8 lbs per rotor, these fully floating assemblies help shed unsprung weight and rotating mass from the rear axle. The rotor rings are machined from a proprietary high-carbon iron casting formulated to Girodisc’s specifications for durability and performance. The 48 curved vanes act as a centrifugal pump, pulling air in through the hub to effectively cool the rotors under hard use. The 2-piece design allows the aluminum hat to be reused with replacement rings (part number D2-357) when needed. Features • 2-piece floating rotor assemblies reduce unsprung weight• Proprietary high-carbon iron rings for superior heat capacity• 48 curved vanes for maximum airflow and cooling• Reusable 6061-T6 aluminum hats with black anodized finish• High-strength cadmium-plated steel drive pins• Fully manufactured and assembled in Bellingham, WA• Diameter: 300mm | Thickness: 22mm | Weight: 15.8 lbs per rotor• Minimum replacement thickness: 20mm Girodisc Nissan Skyline GT-R (R32 V-Spec, R33, R34) Rear Rotors FAQs: Do these rotors fit all R32 GT-Rs? These fit R32 V-Spec models only. They also fit all R33 and R34 GT-R models. Standard R32 GT-Rs require different rear rotors. Do I need to modify my brake pads? Yes, the backing plates on the rear pads must be trimmed flush to the pad material. We can supply pre-trimmed pads if needed. Can the hats be reused? Yes, the hats are designed to be reused with replacement rings (D2-357), making future maintenance more cost-effective. When should I replace the rings? Replace them when thickness reaches 20mm or if cracks extend to the edge of the ring. Related Products Girodisc D2-357 Replacement Rear Rotor Rings – Nissan Skyline GT-R (R32 V-Spec, R33, R34) Girodisc  D1-357 Replacement Front Rotor Rings – Nissan Skyline GT-R (R32 V-Spec, R33, R34) Girodisc A1-357 Front Rotors – Nissan Skyline GT-R (R32 V-Spec, R33, R34)

Girodisc 2-Piece Rear Brake Rotors for Lotus Emira A2-388 Vehicle fitment • 2022+ Lotus Emira (rear axle) Note: Confirm rotor diameter, hat spacing, and caliper clearance on the specific vehicle before purchase. Upgrade the rear braking performance of your Lotus Emira with the Girodisc A2-388 2-piece rotor assembly. Engineered for both street and track use, these rotors help reduce unsprung mass and maintain the factory parking brake function while boosting thermal control under heavy braking. Precision engineered for performance The rotor rings are machined from a proprietary high-carbon iron casting designed by Girodisc. With 48 curved internal cooling vanes, the rotor acts like a centrifugal pump to pull air in through the hub, enhancing cooling even under aggressive use. The 2-piece design reuses the aluminum hat so you can replace just the rings (part number D2-388) when they wear. A2-388 Features • Direct replacement for OEM rear rotors on Lotus Emira• 350 mm diameter × 32 mm thickness• Proprietary high-carbon iron rotor rings• 48 curved-vane internal cooling design• 6061-T6 aluminum hats, black anodized finish• Fully floating design with drive pins, Belleville washers, and spring clips• Manufactured in-house in Bellingham, WA using domestic materials• Replaceable rings available separately (D2-388)• Service limit: minimum thickness 30 mm; replace if cracks reach ring edge Service & Maintenance • Replace rotor rings (D2-388) when thickness ≤ 30 mm or if cracks reach the edge.• Retain and reuse the Girodisc hats, pins, and hardware during ring replacement.• Always torque fasteners to manufacturer spec and follow proper bedding procedures. Frequently Asked Questions Does this retain the factory parking brake? Yes — the design preserves parking brake function. Can I only replace rotor rings, not hats? Yes. The hat is reusable; the replacement rings are sold separately as D2-388. Are these street-friendly? Yes. The floating design is engineered to operate quietly for street use while providing race-level performance. When should I replace the rotor rings? When thickness reaches 30 mm or when cracks approach the ring’s edge. Related Products Girodisc A1-388 Front Rotors – Lotus Emira Girodisc D1-388 Replacement Front Rotor Rings Lotus Emira Rear Caliper Rebuild Kit Lotus Emira Rear  D2-388  Replacement Rings Lotus Emira Front Caliper Rebuild Kit  Enhance your Lotus Emira’s rear braking stability, reduce fade, and maintain performance with Girodisc A2-388 rear rotors.

AP Racing 345x30mm 2-piece J Hook Front Floating Racing Brake Rotors Fit The Following Cars  Corvette C8 Z51 Iron Rotor Front AP Racing by Essex 2-piece Competition J Hook front disc pair for Corvette C8 Z51 with iron discs 345mm x 30mm (13.59" x 1.18") 72 Vane, D66 Huge increase in airflow, cooling capacity, and durability vs. OEM discs Saves 2 lbs. unsprung weight per side vs. OEM iron discs Designed for: club racing, time trial, auto-x, HPDE Works with OEM calipers, no modifications required Ultralight, fully floating, anodized billet aluminum hat with float control/anti-rattle clips Sold/priced per pair. AP Racing J Hook Brake Rotors – The Gold Standard in Track Day & Racing Performance Engineered for professional motorsport, HPDE, and dedicated track day use, AP Racing’s J Hook Brake Rotors deliver uncompromising performance, thermal stability, and consistent braking power. These two-piece, floating rotors are built to handle the extreme demands of road racing, with design features derived from over 50 years of elite competition—including Formula 1, NASCAR, and IMSA. Unlike conventional one-piece rotors, AP Racing’s two-piece floating design features a billet aluminum hat mated to a cast iron disc via precision-engineered bobbins. This setup allows for controlled radial expansion under high heat, minimizing distortion and coning. The result? More even pad wear, a firmer pedal feel, and longer component life, even during extended lapping sessions or endurance racing. Floating hardware includes anti-knockback spring clips that reduce piston retraction while eliminating common NVH issues like rattling. Why Choose AP Racing J Hook Rotors? Advanced Cooling, Superior Bite, Unmatched Durability At the heart of every rotor is AP Racing’s proprietary high-carbon iron alloy, developed to withstand repeated thermal cycling without cracking or warping. Internally, directional vanes—far superior to OEM pillar or straight vane designs—maximize airflow and cooling. With 60 to 84 vanes per rotor, AP Racing achieves faster heat evacuation, reduced brake fade, and a more consistent friction surface. These rotors are left/right-specific for optimal airflow and balance. The exclusive J Hook slot pattern offers enhanced initial bite and promotes uniform heat distribution across the rotor face, reducing pad deposits and vibration. Unlike drilled rotors or straight-slot competitors, the J Hook design provides cleaner pad transfer during bed-in and superior modulation under braking—ideal for serious drivers who demand feedback and control. Yes, you might hear a little more whirr, but you’ll gain the stopping power, consistency, and longevity your lap times demand. Premium Components, Affordable Performance The rotor hats are CNC-machined from 6061-T6 billet aluminum and hard anodized for strength and heat resistance. Scalloped edges under the hat further assist heat dissipation. All hardware is U.S.-made to AP Racing spec, the same quality found on pro-level racing platforms. And while these rotors are race-proven, they’re also surprisingly cost-effective to replace. Don’t settle for cheap rotors that crack after a weekend—AP’s J Hook rings offer better durability and real long-term value. Fewer replacements mean more track time, less downtime, and peace of mind knowing you're running the best. Used by Champions. Trusted by Experts. From endurance racers to HPDE enthusiasts, AP Racing brake rotors are trusted worldwide for their reliability, longevity, and performance under pressure. Whether you're shaving seconds off your lap time or building a dedicated track car, the J Hook delivers a professional-grade solution that won’t let you down.   AP Racing J Hook Brake Rotors for Auto Racing, Track Days & HPDE Why Rotor Design Matters: Heat Expansion and Floating Technology As with most metals, iron brake discs expand significantly under heat. When temperatures rise, the disc grows radially—expanding in both diameter and circumference. Traditional one-piece rotors struggle to accommodate this natural expansion. As the outer edge pulls away from the center under heat stress, it creates a condition called “coning”—a distortion that compromises pad-to-rotor contact. This distortion can lead to uneven pad wear, brake tapering, and an inconsistent, long brake pedal. AP Racing two-piece floating brake rotors are purpose-built to eliminate these issues. Engineered with “float” built into the disc or hat assembly, these rotors feature oblong-shaped mounting holes that allow the hardware to slide as the disc heats up. This flexibility ensures the disc runs true within the caliper under high-temperature loads, effectively reducing distortion, minimizing pad taper and stress cracks, and promoting longer component life. Custom Mounting Hardware & Anti-Knockback Spring Clips AP Racing rotors utilize application-specific, U.S.-made mounting hardware—not generic bolts. These premium components are the exact parts used in AP’s professional motorsport products, engineered to withstand the rigors of competitive racing. To manage lateral disc motion that can push caliper pistons backward (known as knockback), AP Racing integrates anti-knockback spring clips on alternating bobbins—five on a ten-bolt setup, six on a twelve-bolt disc. These clips keep the aluminum hat and iron disc ring properly aligned while still allowing for radial float. Bonus: they eliminate annoying rattles and vibrations, ensuring a quieter, more refined braking experience. High-Performance Hat Design for Heat Isolation The disc hats in AP Racing’s two-piece floating rotors are CNC-machined from 6061-T6 billet aluminum and finished with a hard anodized coating. This high-strength aluminum alloy was selected for its ability to maintain structural integrity even at elevated temperatures. AP adds scalloped channels beneath the hat to further encourage airflow and heat evacuation from the outer disc face, minimizing thermal transfer to hubs and wheel bearings—helping reduce maintenance costs on these expensive components. Internal Vane Engineering: Airflow Optimization & Thermal Stability AP Racing’s internal vane design sets them apart from OEM and most aftermarket competitors. While many factory brake discs use non-directional pillar vanes (low-cost and NVH-focused), AP Racing rotors use directional vanes engineered for maximum airflow. These rotors are side-specific—meaning you’ll receive a unique left and right disc in each set—ensuring optimized cooling through strategic vane orientation and shape. Beyond that, AP Racing rotors feature a superior vane count, typically ranging from 60 to 84 vanes, compared to 30–48 in most aftermarket rotors. After extensive CFD and thermal analysis, this high vane count was proven to: Increase airspeed and thermal transfer Reduce recirculation and deflection at the disc face Minimize coning, cracking, and brake fade Deliver more even pad contact and extended rotor life J Hook Slot Pattern: Exclusive to AP Racing Slots and drill holes may improve initial bite, but they also introduce “cool spots” in the rotor face—areas of uneven heating that can lead to stress risers, cracks, and pad vibration. OEM rotors often avoid this by leaving the disc face blank, but that compromises bite and brake feel. AP Racing’s patented J Hook design, developed through rigorous R&D, solves this problem. The hooks are meticulously spaced around the disc’s circumference and from hat to edge, forming a continuous distortion path that ensures even heat distribution. This encourages uniform pad deposits during bed-in, helps reduce judder and cracking, and improves consistency under repeated high-load braking. In addition, the J Hook slots provide more leading edges for pads to grip than traditional curved slots or blank rotors. While this might generate a mild whirring sound during braking, the benefits—more bite, cleaner bedding, better pedal feel—make it the top choice for committed racers and serious track day drivers. Metallurgy Backed by 50+ Years of Motorsport Leadership AP Racing's reputation is built on performance, and their proprietary iron alloy used in J Hook rotors is no exception. Drawing from over five decades of elite motorsport experience, including 750+ Formula 1 wins and widespread use across NASCAR, AP’s engineers have developed a disc alloy that excels under sustained racing temperatures and stress. Where OEM discs focus on affordability and mass production, AP Racing’s J Hook rotors are purpose-built for motorsport durability and heat resistance. Affordable Replacement Cost: Serious Value for Serious Drivers Even the best brake rotors are consumables. When you drive hard—especially at the track—your discs will eventually wear out. That’s why AP Racing designed their replacement iron rings to be cost-effective, allowing you to replace worn parts without breaking the bank. Compare that to constantly buying cheap $150 rotors every weekend—rotors that can't handle the heat and need to be swapped frequently. With AP Racing’s J Hook rotors, you get longer service intervals, less downtime, and better performance over time, making them an incredibly smart long-term investment. Proven on Track. Trusted by Champions. Top-tier racing teams rely on AP Racing J Hook rotors for one reason: they perform under pressure. Whether you're running time trials, attending HPDE events, or competing in wheel-to-wheel racing, these rotors offer professional-grade reliability, safety, and performance. Bedding and preparation of AP Racing J Hook Disc Properly preparing your new brake discs before heavy use is extremely important. The goal of bedding-in your brake pads and discs is to mate them together properly and prepare them for heavy use.  When prepared properly, or bed-in, your pads will transfer a thin layer of material to the disc face (transfer layer).  The pads in your caliper will then actually ride on that thin layer of pad material you’ve put down on the rotor, rather than rubbing directly on the iron rotor face.  A good transfer layer is going to give you superior brake pedal feel, less noise, superior pad wear, and lower the chances of cracking your discs. Important Notes- PLEASE READ! First, make sure you are on a closed course to perform a proper bed-in.  Do NOT perform the procedure on public roads.  You need a stretch of asphalt with long straights, good visibility, and no potential obstructions.  Make sure you are in a position to safely and repeatedly attain the necessary speeds to perform the bed-in procedure.  A controlled racetrack is the best place to perform this procedure.  AP Racing and Competition Motorsport in no way suggest or condone speeding on public roads or breaking the law in your car, nor do we take responsibility for any damage or injury that occurs as a result of using our product or these procedures.  You are performing the bed-in procedure at your own risk.  During these procedures, it’s critical that you never come to a complete stop with your foot on the brake pedal.  If you have brake ducts on your car, you may want to block them off to allow your brake system to heat up easily. The procedure outlined below is a generic procedure for most types of mild race pad.  Please check your pad manufacturer’s recommended bed-in procedure. Accelerate to approximately 60mph and then decelerate down to 5 mph.  If your car has ABS, you should try to hold the brakes at a point just before ABS intervention.  Once the car slows to 5mph, immediately accelerate back up to about 60mph, and brake again to roughly 5mph.  Repeat this series of stopping and accelerating 8 to 10 times.  Again, do not come to a complete stop with your foot on the brake pedal. Cool the brake system down by cruising at 45mph+ for 5 to 10 minutes. Visually inspect your discs.  They should be a blue/grey color (instead of shiny silver), and have an even layer of pad material across and around the entire rotor face. If the AP Racing rotors don’t have a layer of pad material on them, perform another series of stops in the manner outlined above.