The R1 Concepts drilled black brake rotor for the front left of 2005–2014 Ford Mustang is a vehicle-specific rotor intended for that wheel location. The description identifies a drilled face and black finish for the front-left application, marking this part as the specified replacement when performing brake service or addressing a worn rotor on the listed Mustang model years.
R1 05-14 Ford Mustang Front Left Drilled Black Brake Rotor