Girodisc Porsche 996 GT3 Cup Rear Rotors (with Spacers & Bolts)
The Girodisc A2-126B Rear Rotor Kit is a high-performance, direct replacement solution for Porsche 996 GT3 Cup models, as well as 997.2 GT3 and GT2 variants. Designed to work seamlessly with OEM calipers and unmodified factory pads, this 2-piece floating rotor system enhances braking performance and cooling without altering factory brake bias or ABS operation.
Lightweight, High-Performance Design
Each Girodisc rotor assembly features a precision-machined 6061-T6 aluminum hat mated to a proprietary cast iron rotor ring. The 2-piece design reduces unsprung and rotational mass, allowing for faster suspension response, better braking consistency, and improved acceleration. The rotor utilizes curved internal vanes, developed through racing, to act as a centrifugal pump that draws cooling air through the disc, minimizing heat soak and fade during demanding track sessions.
Floating Mount System with Anti-Noise Technology
The Girodisc floating mount system connects the rotor ring to the hat using 10 high-strength alloy steel drive pins, all manufactured in-house in the USA. Each pin is cadmium-plated for long-lasting corrosion protection and secured with class 12.9 hardware and hardened washers. Anti-noise spring washers eliminate the rattling typically associated with floating rotors, maintaining quiet and smooth performance for both track and street use.
Girodisc A2-126B Vehicle Fitment
- Porsche 996 GT3 Cup
- Porsche 997.2 GT3 / GT2 (with or without OEM PCCB)
- Includes caliper spacers and longer mounting bolts
- Direct-fit upgrade — no modifications required
Technical Specifications
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CMS Number: A2-126B
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Position: Rear
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Rotor Diameter: 350mm (includes spacers & bolts)
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Design: 2-piece floating rotor
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Material: Proprietary cast iron with 6061-T6 aluminum hat
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Vane Design: Curved internal vanes for superior cooling
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Hardware: Cadmium-plated drive pins, class 12.9 cap screws, anti-noise washers
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Rebuildable: Yes — replaceable rings and reusable hats
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Sold/Price: Per pair
FAQs
Are these rotors a direct replacement? Yes. The A2-126B rotors bolt directly to the car with the included hardware and spacers, requiring no additional modifications.
Do they work with OEM brake pads? Absolutely. These rotors are designed to be used with factory unmodified pads, ensuring full compatibility.
How do they improve performance? Reduced unsprung weight and enhanced cooling efficiency deliver sharper braking, quicker heat dissipation, and more consistent pedal feel.
Can the rotor rings be replaced? Yes. Girodisc rotors are fully rebuildable—simply replace the iron rings when worn and reuse the aluminum hats.
Enhance your Porsche 996 GT3 Cup’s braking power with Girodisc A2-126B Rear Rotors. Lightweight, rebuildable, and engineered for peak performance on track or street, this kit delivers professional-grade stopping power with OEM fitment.
