The R1 Concepts drilled black brake rotor for 1990–1991 Audi 90 Quattro (front left) is a direct-fit replacement that restores the vehicle's braking surface with a drilled face and black finish. Specified for the front left position on those Quattro years, it matches the original rotor mounting pattern and dimensions for correct fit during routine brake service.
R1 90-91 Audi 90 Quattro Front Left Drilled Black Brake Rotor