The R1 Concepts drilled-and-slotted black brake rotor is presented as a replacement front-left rotor for GMC TopKick medium-duty trucks. Described as drilled & slotted with a black finish, it matches the catalog specification and functions as a serviceable rotor for the front assembly. Fitment is explicit: for GMC C5500 TopKick applications from 2003–2010 in the front-left position.
R1 03-10 GMC C5500 Topkick Front Left Drilled & Slotted Black Brake Rotor