The R1 Concepts slotted black brake rotor for the front left of 1981–1987 Dodge D50 is a front-left replacement rotor specified for those years. The catalog entry describes it as a slotted black rotor intended for use when the front-left rotor on the listed D50 models needs replacement, restoring the slotted braking surface identified in the product listing.
R1 81-87 Dodge D50 Front Left Slotted Black Brake Rotor