Porsche 991 GT3 Cup Front Rotors (380x32)
The Girodisc system is a direct replacement for the OE front rotors on the Porsche 991 GT3 Cup car. No modifications are required—these lightweight 2-piece floating rotors bolt directly to the car and work seamlessly with factory calipers. Designed for the demands of professional motorsport, Girodisc rotors deliver superior cooling, durability, and braking precision under the harshest track conditions.
Built for Competition-Level Performance
Girodisc 380x32mm rotors are engineered and machined entirely in the USA from the highest-quality materials. The aluminum hat is CNC-machined from 6061-T6 aircraft-grade alloy for weight savings and strength. The iron rotor rings are made from Girodisc’s proprietary high-carbon alloy, poured and machined in-house for exacting balance and heat resistance. The curved vane design acts as a centrifugal pump, drawing air through the disc to reduce fade and maintain consistent braking throughout long races.
Vehicle Fitment
- Porsche 911 GT3 Cup (991.1 & 991.2)
- Porsche 911 GT3 R (for equivalent front setup)
Features
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Direct OEM Replacement: Bolts directly to factory hubs and calipers—no modifications needed.
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380x32mm Rotor Size: Provides greater surface area and heat capacity for endurance-level braking.
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Lightweight Two-Piece Design: Reduces unsprung and rotational mass to improve cornering response and acceleration.
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Curved Vane Internal Cooling: Directional vanes act as centrifugal pumps, pulling cool air through the disc to reduce temperatures and extend pad life.
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Floating Mount System: Twelve high-strength alloy drive pins with anti-noise spring washers allow the rotor to expand under heat while preventing rattle.
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Replaceable Rings: The aluminum hats are reusable—only replace the iron rings when worn.
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Made in the USA: Designed, cast, machined, and assembled domestically to the highest racing standards.
FAQs – Porsche 991 GT3 Cup Front Rotors (380x32)
Do these rotors fit OEM calipers? Yes, they fit directly with the factory Porsche Motorsport calipers.
Can they handle endurance racing? Absolutely. Girodisc rotors are built to survive repeated high-temperature cycles during endurance and sprint events.
What makes Girodisc better than OEM? They offer reduced weight, better cooling, and replaceable rotor rings, saving long-term maintenance costs.
Are they sold as a pair? Yes, Girodisc rotors are sold and priced per pair.
Enhance your Porsche 991 GT3 Cup’s braking performance with Girodisc’s 380x32mm 2-piece floating rotors. Designed for uncompromising race performance, these rotors deliver cooler operation, consistent pedal feel, and lasting durability for the most demanding track conditions.
