Knowledgeable snowmobilers agree - the drive belt of choice for high performance is Ultimax XS XS is designed for high-horsepower sleds and delivers superior performance and longer belt life XS features a specially formulated rubber compound found in no other snowmobile belt Tests prove that XS transfers more power and runs cooler For high-performance sleds, capture the power with Ultimax XS Double-cog design. BELT ULTIMAX XS SKI DOO