S&S CYCLE Cylinder Heads - 79 cc - Super Stock - Twin Cam

Highlights

• 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 manageable compression ratio.
• Heads can be decked up to.060" to increase compression, but will require piston valve pockets to be re-machined.
• Compatible with stock rocker boxes, exhaust, and intake manifolds.
• Machined for S&S electric or manual compression releases.
• Made in the USA.
• Should 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.