The R1 Concepts drilled-and-slotted black brake rotor is specified as a replacement rear-left rotor. Identified as drilled & slotted and finished in black, it matches catalog detail and serves as a serviceable rotor for the rear brake assembly. Fitment is explicit: for Isuzu FSR applications from 1990–2003 in the rear-left position, supplied to align with factory mounting points.
R1 90-03 Isuzu Fsr Rear Left Drilled & Slotted Black Brake Rotor