Meets U.S. Forest Service legal spark arrestor requirements while maximizing performance 96 db sound level meets U.S.F.S. requirements Specially engineered internal metal baffle, chambers, and sound-absorbing materials for lower sound levels and no loss of motor performance FIM-approved stainless steel end cap Silencer body is made from extruded 6061-T6 aluminum to reduce weight Removable Allen head screws make repacking an easy task Double-walled mounting brackets