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The R1 Concepts drilled-and-slotted black brake rotor is specified as a replacement rear-right rotor for Workhorse applications. Catalog detail lists it as drilled & slotted and finished in black, intended to serve as a serviceable rotor for the rear brake assembly. Fitment is explicit: for Workhorse 500Lb GVW applications from 1989–2022 in the rear-right position.
R1 89-22 Workhorse 500Lb Gvw) Rear Right Drilled & Slotted Black Brake Rotor
