The R1 Concepts black drilled-and-slotted rear-right brake rotor for 2015–2021 Subaru WRX is a single replacement rotor specified for that wheel position and model years. This rotor is described as drilled & slotted with a black finish and is offered for the rear right side to match the vehicle's stated fitment and install location.
R1 15-21 Subaru WRX Rear Right Drilled & Slotted Black Brake Rotor