S&s cycle cyl.hd.89cc 99-05tc blk

Super Stock® heads intended for larger displacement engines, S&S 89cc heads have a whopping 264cfm flow rate (compared to 182cfm for stock H-D® heads), larger valves and .640 inch lift valve springs. S&S recommends Easy Start cams or manual or electric compressions release system in order to maintain reliable engine starting on high compression applications. 1999–2006 Big Twin Models Stock and 3-7/8 inch bore Heads can be decked up to .060 inch to increase compression 2.000 inch intake and 1.605 inch exhaust valves S&S .640 inch lift valve springs Stock Harley-Davidson® rocker boxes can be retained if S&S manual compression release or S&S Easy Start cams are used. Must use S&S valve cover gasket part #90-4124 with stock rocker covers