Girodisc Porsche 996 GT3 Cup Rear Rotors, incl. spacers & boltsThe Girodisc system is a direct replacement for the OE disc on all 997. 2 GT3 GT2's, with or without the 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