HEADS 06-17TC 79CC BLK

79 cc Super Stock® Cylinder HeadsHeads are fully assembled with springs and valvesDesigned for stock 88" to 103" engines or slightly modified engines up to 110"Moderately sized 1.940" intake and 1.575" exhaust valves maintain port velocity in smaller displacement engines for good low and midrange responseS&S® High performance valve springs allow the installation of camshafts with up to .650" liftCombustion chamber provides a significantly higher than stock, but still manageable compression ratioHeads can be decked up to .060" to increase compression, but will require piston valve pockets to be re-machinedCompatible with stock rocker boxes, exhaust, and intake manifoldsMachined for S&S® electric or manual compression releasesMade in the USAShould not be used with any piston having a pop up dome.Not compatible with '14-'16 FLHTK/FLHTKL, FLHTCUTG Twin-Cooled motors or '17 touring models.Must use the included S&S valve cover gasket kit with stock rocker covers.Must use S&S rocker boxes if S&S compression releases are used.Not for late model twin cam Harley Davidson® ACR's (Atomatic Compression Release) already installed.