S&S Cycle Chain Drive 635 H.O. Camshaft Kit

• While it is true that the early version introduced in 1999 was often not well suited to high performance applications, the later version introduced in the 2006 Harley-Davidson Dyna model, and later incorporated in all Big Twins in the 2007 model year, was vastly improved

• Popular camshaft grinds MR103, HP103, 635 H.O. now available for early Twin Cams

• Experience has shown that the new chain drive with hydraulic chain tensioner works well for all but the most demanding high performance applications

• The kit includes gear cover gasket and cam bearings

• RPM range 4000-6500

• For best results requires ported heads, low restriction intake/exhaust

• High-power cam for modified engines, increase compression, high-lift springs, adjustable pushrods and large throttle body required