The R1 Concepts drilled black rear-left brake rotor for 2008–2010 Chevrolet Cobalt is specified as a direct replacement for the rear left position. Finished in black with a drilled face, it aligns with the listed rotor specification and provides a compatible service part when replacing rear rotors on the stated Cobalt models, allowing reuse of existing mounting hardware.
R1 08-10 Chevrolet Cobalt Rear Left Drilled Black Brake Rotor