Meets U.S. Forest Service standards without sacrificing performance or horsepower, Specially engineered internal metal baffle eliminates the chance of a spark leaving the exhaust system, Clog-free Krizzman bullet design, 6061 T-6 brushed aluminum housing, FIM-approved 304 stainless steel end cap, Stainless steel intake tube, Double-walled mounting brackets, Exclusive E-glass pillow packing