S&S CYCLE 0930-0064 106-3233 Super Stock® Cylinder Heads - 79 cc - Twin CamFeatures Heads are fully assembled with springs and valves Designed 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 response S&S High performance valve springs allow the installation of camshafts with up to . 650" lift Combustion chamber provides a significantly higher than stock, but still