The R1 Concepts drilled black brake rotor for 1974–1980 Mercury Comet (front left) clarifies the part and its wheel location. The listing denotes a drilled face and black finish and explicitly matches the rotor to the Comet years indicated. This item provides the front-left braking surface for the named Comet applications and serves as the application-specific rotor for owners working on those model years.
R1 74-80 Mercury Comet Front Left Drilled Black Brake Rotor