Girodisc Ferrari 456M, 550, 575M Front RotorsThese GiroDisc 2 piece rotors are a direct replacement for the Ferrari 456M, 550, and 575M. Weighing in at 18 lbs per rotor, these fully floating assemblies help shed unsprung weight and rotating mass from the front axle of the vehicle. The rotor rings are machined from a proprietary casting made of high carbon iron formulated to GiroDiscs specifications. This superior metallurgy results in a rotor that holds up better, and the 48 curved vanes act as