The R1 Concepts drilled-and-slotted black brake rotor is cataloged as a replacement rear-right rotor for GMC TopKick applications. It’s described as drilled & slotted with a black finish to match the listed specification and act as a serviceable rotor for rear braking assemblies. Fitment is explicit: for GMC C5500 TopKick applications from 2004–2010 in the rear-right position.
R1 04-10 GMC C5500 Topkick Rear Right Drilled & Slotted Black Brake Rotor