The R1 Concepts Geo-Carbon drilled and slotted rear rotor for 2015–2021 Subaru WRX is a GeoPerformance rear rotor option for WRX models in that range. Its drilled-and-slotted face is specified for rear brake service and is presented as a direct replacement rotor sized to the WRX rear mounting configuration.
DFC 15-21 Subaru WRX Rear Drilled & Slotted Geoperformance Rotors