RPM's Rustler rear bumper is designed to protect the rear of the chassis, the motor and the body, all while still allowing the use of a stock Traxxas Wheelie Bar (Traxxas #3678 not included). Additionally, if you decide to run without the Wheelie Bar, the rear bumper is so versatile, it will adapt and allow either configuration. The RPM Rear Bumper for the electric Rustler is designed tough, with serious impact absorption characteristics built in. With the use of an RPM Rear Bumper Mount (RPM #80902 or RPM #80905 not included), the protection for the motor becomes nearly indestructible! Each RPM Rear Bumper is made in the USA from engineering grade nylons and is backed by a limited lifetime warranty against breakage. Tech Notes: RPM Rear Bumpers for the Traxxas Electric Rustler require a bumper mount (either a Traxxas #3677, RPM #80902 or RPM #80905 not included) or a Wheelie Bar (Traxxas #3678 not included) to install. If your version did not come with a bumper mount or wheelie bar, you will need to acquire one prior to installing. Works with most known Traxxas Rustler bodies. Aftermarket or non-standard bodies may require trimming for proper fit. Will not fit the Nitro Rustler.