Features: 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.