This is an optional RPM Mini Front Bumper. This bumper is compatible with the Associated B4, T4 and GT2 vehicles, as well as the HPI Firestorm family of vehicles. Race oriented Associated GT2, B4 & T4 owners prefer lightweight, yet effective parts. Weighing in at a mere 5-3/4 grams, it is small in size but big on performance. This mini bumper is 30% thicker than the stock skid plate providing tons of extra skid and impact resistance. The RPM mini bumper extends in front of the vehicle and curves up into a 2” wide bumper that actually performs as a bumper. It protects both the chassis and the hinge pins from frontal impacts and acts as a low-friction skid plate. RPM mini bumpers also use all four bulkhead mounting screws to disperse impacts over a larger area reducing transferred impact forces by over 50%! As a finishing touch, RPM mini bumpers have recessed mounting holes so all those nasty scrapes and crashes will be absorbed by the bumper, not the screw heads!