The R1 Concepts slotted brake rotor for Audi 90 Quattro (1990–1991) is a front-left replacement finished in black. Offered for the front-left wheel position on those model years, this slotted rotor matches the stated Quattro application and supplies the slotted rotor configuration and finish described in the source text.
R1 90-91 Audi 90 Quattro Front Left Slotted Black Brake Rotor