Pro Moto Billet designed their spark arrestors as an economical way to convert your stock muffler into a U.S.F.S. approved spark arrested muffler. When the spark arrestor screens are not required such as at the MX track simply remove three machine screws on each end cap and take out the screens, it's as simple as that. Each end cap is machined out of solid 6061 aluminum and anodized with a protective finish. Each spark arrestor includes an end cap assembly with, removable nozzle, a spark arrestor screen, and all required mounting hardware. See Installation Instructions for model specific installation requirements. Fits: KTM SX 400/525 2003-2005; EXC-RFS 250 2004-2005; EXC/MXC 400/450/525 2004-2005; SX-F 250 2005. Black anodized removable end cap nozzle.
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