The rare bumper cover or the rear bumper points towards the part that is set on the lower rear area of a car. These parts are manufactured in different kinds of materials, styles, shape and sizes and from these varieties you can select the best that suits your car. The rare bumper cover absorbs the shock produced during any collide or crashes from behind. The custom rear bumper manufactured by Mercury tracer usually has a let out that allows the exhaust tip of the car. There are Mercury tracer custom rear bumper available in the market which gives your car a sporty and classic look. Rear bumper is a common aftermarket custom part.