the bumper 64 has a base wall 66 extending laterally and a pair of opposed side walls 68 extending generally vertically or perpendicularly from the base wall 66 the side walls 68 have inner surfaces 70 that are tapered or inclined from the base wall 66 toward a free end thereof in one embodiment the bumper 64 may include at least one preferably a plurality of projections 72 extending laterally from the side walls 68 the bumper 64 may also include at least one preferably a plurality of apertures 74 extending through the side walls 68 the bumper 64 is disposed between the side walls 32 of the body side strap 26 the apertures 74 are aligned with corresponding apertures 35 in the side walls 32 of the body side strap 26 and a pin not shown may be inserted through the apertures 74 in the bumper 64 and the apertures 35 of the body side strap 26 and staked or riveted thereto the projections 72 of the bumper 64 extend through corresponding apertures 35 in the side walls 32 of the body side strap 26 and create an anti rotation feature the bumper 64 is made of a dampening material such as an elastomeric material it should be appreciated that any suitable mechanism may be used to secure the bumper 64 between the side walls 32 of the body side strap 26.