The R1 Concepts Geo-Carbon drilled-and-slotted brake rotor is intended for the rear right position on 2015–2023 Ford Mustang applications. Its drilled-and-slotted face and Geo-Carbon designation describe the rotor pattern and look, and the description calls out rear-right fitment and model years to aid correct selection when replacing a rear rotor on those Mustang years.
R1 15-23 Ford Mustang Rear Right Drilled & Slotted Geo-Carbon Rotor