The R1 Concepts slotted black brake rotor for the front left of 1979–1986 Plymouth Arrow Pickup is a front-left replacement rotor specified for that vintage model range. The product description lists it as a slotted black rotor intended for use when replacing the front-left rotor on the noted Arrow Pickup years, restoring the slotted braking surface identified in the catalog entry.
R1 79-86 Plymouth Arrow Pickup Front Left Slotted Black Brake Rotor