Girodisc Ferrari 360, F430 Front or Rear RotorsFitment Note: These rotors fit on the front or rear axle, and are sold in pairs. These GiroDisc 2 piece rotors are a direct replacement for the Ferrari 360 and F430 (without factory carbon ceramic brakes). Weighing in at 15. 8 lbs per rotor, these fully floating assemblies help shed unsprung weight and rotating mass from the front or rear axle of the vehicle. The rotor rings are machined from a proprietary casting made of high carbon iron formulated