SuperStock cylinder head kit. Silver

Silver powder coated. Stock style high performance bolt-on replacement for Twin Cam models, compatible with stock manifolds, rocker boxes and exhausts. Heads are 79cc and take stock diameter 1.940" intake and 1.575" exhaust valves. Head will handle up to .650" lift and are set-up to be used with up to .186" intake & .179" exhaust TDC lift in combination with stock pistons. This allows the use of S&S 510, 570 and 585 camshafts. Heads can be decked up to .060" to increase compression but then valve lift clearance checks are required. Expected compression ratio's for unmodified heads with stock pistons will approximately be 9.8 CR (96"), 10.2 CR (103"), 11.1 CR (103" with pop-up S&S pistons) and 10.8 CR (110"). Heads come complete with valves, guides and valve springs installed.