Fasway Spark Arrestor Exhaust Tip. In good condition, review pictures carefully. What is pictured is qhat will be shipped. NO returns. See fitment in the pictures. If ou have any questions please contact the seller. The Fastway Spark Arrestor End Cap is designed as an efficient 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 two machine screws on each end cap and take out the screens. Each end cap is machined out of solid 6061 aluminum and anodized with a protective finish. Designed to quickly and easily convert stock, 4-strokes and some 2-strokes, to United States Forest Service (U.S.F.S.) approved mufflers. Precision engineered, manufactured, and assembled in the U.S.A. 6061 billet aluminum construction U.S.F.S. approved