Porsche 997 GT3 Cup 380x34mm Front Rotors
Girodisc 2-piece floating front rotors are a direct, high-performance replacement for the factory discs on all Porsche 997.2 GT3 and GT2 models, including Cup applications. Designed to bolt directly to the car and work with OEM calipers, they allow continued use of unmodified factory pads—unlike most aftermarket solutions for this platform. This upgrade maintains factory brake bias and ABS function while reducing weight, improving cooling, and enhancing overall braking consistency.
Each assembly features a precision-machined 6061-T6 aluminum hat mated to Girodisc’s proprietary high-carbon cast-iron rotor rings. The 380x34mm curved vane design acts as a centrifugal pump, drawing cooling air through the disc for outstanding heat management and fade resistance under high-load track conditions. Every component is designed, cast, and machined in-house in the USA to exacting motorsport standards.
Precision-Engineered Performance
Vehicle Fitment
- Porsche 997.2 GT3
- Porsche 997.2 GT2
- Porsche 997 GT3 Cup
Girodisc A1-126 Features
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Direct OEM replacement: Fits OEM calipers and hardware without modifications or special adapters.
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Curved vane design: 12 directional vanes circulate air through the rotor to manage temperature and prevent fade.
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Floating mount hardware: Cadmium-plated steel drive pins with anti-noise washers allow for thermal expansion and eliminate rattling.
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Lightweight two-piece construction: Reduces unsprung and rotational mass for sharper steering and faster response.
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Serviceable system: Replace only the cast-iron rings when worn while reusing the aluminum hats.
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Made in the USA: All Girodisc rotors are designed, cast, and machined domestically for uncompromising precision.
Girodisc A1-126 FAQs
Can these be used with factory brake pads? Yes, Girodisc rotors are designed to accept OEM pads with no modification required.
Are they compatible with OEM PCCB systems? Yes, they replace PCCB rotors directly while maintaining stock brake bias and performance balance.
Do these rotors make noise? No, anti-noise spring washers eliminate the rattling common to floating designs.
Are they track-ready? Absolutely. Girodisc rotors are built to perform under extreme heat cycles on street or track.
How are they sold? Sold and priced per pair.
Upgrade your Porsche 997 GT3 or GT2 with Girodisc’s 380x34mm floating rotors for improved cooling, reduced fade, and race-proven durability—perfect for both spirited street driving and competitive track use.
