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. S/A SIL CR250 '92-96