In comparison to a stock rear bumper, RPM moved it rearward by a full 12' to help reduce the problem of rear impacts destroying bodies. RPM also moved the top of the bumper up by approximately 78', improving rollover protection of the body as well. Theyve added material around the upper screw hole mounting posts to strengthen those otherwise weak areas too. The mud flaps have been removed from the bumper for those wanting protection without the added weight of the mud flap system (an RPM mud flap kit - #73032 - is sold separarely).