Porsche 991 GT3 Front Rotors
Girodisc 2-piece floating rotors are a direct, high-performance replacement for the factory iron rotors on Porsche 991 GT3 and GT3 RS models. Designed to bolt directly to the car with no modifications, these rotors retain compatibility with factory pads—something most aftermarket options can’t claim. The result is OEM fitment with upgraded braking performance, lighter weight, and better heat control under demanding track conditions.
Each assembly features a 6061-T6 aluminum hat and Girodisc’s proprietary cast-iron rotor ring, manufactured and machined entirely in the USA. The curved vane design acts as a centrifugal pump, drawing cool air through the rotor to reduce surface temperatures and maintain consistent braking performance even under heavy load.
Precision-Engineered Performance
Vehicle Fitment
- Porsche 991 GT3
- Porsche 991 GT3 RS
Features
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Direct OEM replacement: Works with stock calipers and pads—no special hardware or machining required.
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Curved vane cooling: Directional vanes pump air through the disc for optimal heat management and fade resistance.
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Floating mount system: Twelve cadmium-plated drive pins allow the rotor to expand under heat without distortion or rattle.
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Factory compatibility: Designed to work with Porsche’s OEM iron rotor setup, retaining proper brake bias and ABS function.
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Lightweight construction: Reduces rotational mass and improves suspension response without compromising durability.
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Optional center lock fitment: Available with center lock drive pins for cars equipped with OEM center lock wheels.
Girodisc A1-146 FAQs
Do these fit factory calipers? Yes, they are a direct bolt-on replacement for OEM iron rotors using factory pads and hardware.
Will they work with center lock wheels? Yes—select the center lock option when ordering for proper fitment.
Are they quieter than stock? Yes, the anti-noise spring washers reduce rattle and ensure smooth, quiet operation.
Are they track-proven? Absolutely. When paired with quality pads and hi-temp fluid, these rotors deliver race-level performance and fade resistance.
How are they sold? Sold and priced per pair.
Step up your GT3’s braking consistency with Girodisc’s precision-built floating rotors—lighter, cooler, and engineered to perform lap after lap.
