Design is one pound lighter than standard design Smooth upshifts and backshifts from Twin Trax helix Twin enclosed rollers Fully tunable with optional helix angles and springs Optimized rib design reduces drag and improves cooling Increased efficiency Improved length-to-diameter ratio on bushings New helix design requires only four fasteners TSS-98 clutches and clutch helixes are NOT interchangeable with TSS-04 clutches and clutch helixes Choose a TSS-04 style clutch for your snowmobile
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