These GiroDisc 2-piece rotors are a direct replacement for the rear rotors on the Toyota GR Supra with the 3.0L motor, as well as BMW G-chassis cars with a 345mm rear rotor, including (but not limited to):

Our 2-piece, 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 GiroDisc’s specifications. This superior metallurgy results in a rotor that holds up better, and the 72 curved vanes act as a centrifugal pump pulling air in through the hub to effectively cool the rotors under hard use. The 2-piece design means a reusable hat which can be attached to new rings (part number D1-307) when they need to be replaced.