S&S CYCLE S&S® Super Stock® 79cc Cylinder Head Kit For 2006-'16 HD® Big Twins - Silver Powder Coat Finish 106-3227

These S&S^® Super Stock^® high performance cylinder heads are designed for stock displacement or slightly modified 2006-'16 engines up to 110". The 79cc combustion chamber provides a significantly higher than stock, but still manageable compression ratio. Machined for S&S^® electric or manual compression releases. The moderately sized 1.940" intake and 1.575" exhaust valves maintain port velecity 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. Compatible with stock rocker boxes, exhaust, and intake manifolds. Silver powder coat finish matches stock silver engine components.

• High port flow gives great performance now, and more later when additional upgrades are done
• Heads are fully assembled with springs and valves
• Compression ratios vary depending on cylinder heads chosen, pistons used and engine displacement; see Compression Ratios chart for specifications
• 79cc heads work great with stock motors for 88" to 103" motors; 89cc heads work best for motors over 103" or with high-compression pop-up pistons
• 79cc have 1.940" intake and 1.575" exhaust valve and springs for up to .640" lift; 89cc have 2.000" intake and 1.605" exhaust and .640" springs
• Heads are machined for compression releases unless noted otherwise (sold separately); S&S rocker boxes required when using S&S compression releases
• Do not include rocker arm components, intake manifold or gaskets
• Heads include four long headbolts, and reuse four long OEM headbolts
• Accept OEM intake manifolds
• Made in the U.S.A.
• Must use S&S rocker boxes (PART #90-4110) if S&S compression releases are used.
• Not compatible with Twin Cooled heads.
  
  NOTE: Not for models with OEM compression releases.
  

Fitment Guide

Specs