S&S Cycle 89cc Super Stock Cylinder Head Kit For Harley Twin Cam 2006-2017

S&S Cycle 89cc Super Stock Cylinder Head Kit

S&S® Super Stock® cylinder heads cater to 2006-2016 engines, enhancing performance for stock displacement units and excelling with bigger stroker or big bore engines up to 110". With an 89cc combustion chamber, it strikes a balance between higher compression ratios and manageability, making it ideal for touring bikes and heavy vehicles. It features large 2.000" intake and 1.605" exhaust valves for robust low and midrange response, complemented by intake ports flowing 264 cfm. The heads support camshaft installations up to .650" lift and are compatible with stock rocker boxes, exhaust, and intake manifolds, all while boasting a wrinkle black powder coat finish for aesthetic synergy with stock engine components.

Features:

• Black powder-coat finish
• 89cc
• Compatible with stock rocker boxes, exhaust, and intake manifolds
• Includes 4 long headbolts for installation
• Stock rocker boxes will not work if S&S Cycle electric compression releases are used
• Must use the included valve cover gasket kit with stock rocker covers
• 2.000" intake & 1.605" exhaust valves
• Increases flow rate to 264cfm (compared to 182cfm for stock heads)

Note: Super Stock heads will not work with S&S compression releases in a late model twin cam that has HD® ACR's already installed. S&S compression releases are controlled by a starter relay but the stock HD ACRs are controlled by the ECM and they do not work together properly.  Damage will be caused to the heads and engine if customer or dealer tries to tie into the HD® wiring.