Girodisc Porsche 997 GT3 Front Rotors (380mm)The Girodisc system is a direct replacement for the OE disc on 997. 1 GT3 GT2's with OEM PCCB rotors. No modifications are necessary, allows use of factory unmodified pads unlike most aftermarket solutions for this application. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading your brakes with lightweight high performance replacements as opposed to a big brake kit, your factory bias is maintained as well as your