The RPM Torment 4A—4 rear bumper is a very unique design that dramatically improves strength durability and scale looks over any other bumper options available Our bumper is based off of a tubular scale support structure that mimics a full-scale 2-1/2a diameter tube We also lifted the bumper and bumper supports away from the bottom of the chassis to protect it from rear end wear The higher bumper position helps protect the body much better as well prolonging the life of that custom paint job you worked so hard on The RPM Torment 4A—4 rear bumper also allows the use of our #73032 mud flap and number plate kit (sold separately) as well as our #81312 low visibility wheelie bars (sold separately) now you can add some serious scale looks with our mud flaps and number plate kit while hiding a trick set of wheelie bars when nose high without fear of wearing out the hard parts out back RPM Torment 4A—4 rear bumpers are molded in black and backed by our limited Lifetime warranty against breakage for a Lifetime of worry free performance durability and scale looks Tech notes RPM #81612 Replaces ECX231019 Each bumper includes all additional hardware needed for installation and complete installation instructions Slight body modifications will be needed to clear the bumper supports