A lightweight metal spoiler is integrated with a tailgate of an automotive vehicle. The integrated tailgate spoiler is formed from the same material as the frame or rear portion of the tailgate body, preferably aluminum, in one arrangement and from different materials in another arrangement. First and second spoiler portions are joined together along overlapping, mating, abutting edges. The first and second portions of the tailgate are brazed together at an acute angle and the unitary spoiler is fused to the rear portion of the tailgate body.