This is an optional RPM Extra Wide Front Bumper. This bumper is compatible with the Associated B4, T4 and GT2 vehicles, as well as the HPI Firestorm family of vehicles. The stock front bumper on the Associated GT2, B4 & T4 is simply a miniature skid plate. It does nothing to help protect the front end of the vehicle. The RPM wide front bumper for the Assoc. GT2, B4 & T4 is made from RPM's blend of bullet proof nylons, and was designed to add in loads of bash-proof protection! At a full 6” in width, this bumper can handle some serious abuse! It extends far enough in front of the vehicle to absorb some of the most brutal impacts without transferring the major shock of the impact into the more fragile areas of the vehicle while providing ample front-end chassis skid protection from hard landings. This front bumper also has strengthening ribs built into it that have a multi-purpose design; The ribs not only add strength to the bumper, but they act as low friction skid rails and they help protect the screw-heads holding the bumper to the bulkheads. The RPM wide front bumper for the GT2, B4 & T4 uses all four bulkhead mounting screws. This helps disperse any impact forces that do make it to the chassis over twice the area of a stock bumper, thereby reducing or eliminating damage to other more fragile areas of the vehicle.