The R1 Concepts drilled-and-slotted black brake rotor is presented as a replacement front-right rotor for Workhorse applications. Catalog description lists it as drilled & slotted and finished in black to match the specification while serving as a serviceable rotor for the front brake assembly. Fitment is explicit: for Workhorse 500Lb GVW applications from 1989–2022 in the front-right position.
R1 89-22 Workhorse 500Lb Gvw) Front Right Drilled & Slotted Black Brake Rotor