A1-146 Girodisc Porsche 991 GT3 Front Rotors

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 Direct OEM replacement: Works with stock calipers and pads—no special hardware or machining required. Curved