Being an important and noticeable part of your car, the Audi 4000S rear bumper is also concerned with your car's sturdiness. It is the Audi 4000S bumper cover at the backside that protects the vehicle in case of minor collisions. Apart from this, an Audi carbon fiber rear bumper will help your vehicle look better and different. Other options that you have for an Audi 4000S custom rear bumper include the equivalents that are made with fiberglass or plastic. An Audi aftermarket bumper will add more caliber, attractiveness, and elegance to the stunning vehicle.