GiroDisc Slotted Rear Brake Rotors 380mm BMW M2/M3/M4 F8x Red/Gold CalipersFree shipping This application is only for M2, M3 & M4 cars equipped with Red calipers or Gold Calipers converted to iron rotors. The Gold Brakes are Ceramic Brakes, they can be switched to run iron rotors if you also change the Pads off of Ceramic. Sold priced per pair. The Girodisc system is a direct replacement for the OE disc, no modifications are necessary. The disc will bolt directly to the car and work with OE calipers perfectly. By upgrading