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S&S CYCLE 91 cc Super Stock® Cylinder Heads (Twin Cam) – Pair Upgrade your Harley-Davidson big twin with S&S CYCLE 91 cc Super Stock® Cylinder Heads engineered for serious street performance. Finished in wrinkle black and made in the USA, these aluminum heads are built for airflow and compatibility with popular S&S engine configurations. Key Features Designed for S&S® T-Series T2 long block engines for Harley-Davidson big twins and engines with S&S® 4-1/4" bore Hot Set Up installed 2.000" intake and 1.605" exhaust valves with S&S® ports for strong breathing Uses S&S® high-performance valve springs , allowing camshafts up to .650" lift Compatible with stock rocker boxes , exhaust, and intake manifolds Manifold mounting surface machined to stock dimensions Not machined for compression releases Use S&S valve cover gasket kit with stock rocker covers Not compatible with '14-'16 FLHTK/FLHTKL , FLHTCUTG Twin-Cooled motors or '17 touring models Important Fitment Notes A special manifold/throttle body is required for engines that are not stock height. Specifications Brand: S&S CYCLE Model: Super Stock Displacement: 91 cc Material: Aluminum Finish: Wrinkle Black (Powder-Coated) Riding Style: Street Product Type: Cylinder Head Kit (Pair) Weight: 30.2 lbs | Dimensions: 17.85" x 11.22" x 11.12"
Designed specifically for S&S® T-Series T2 long block engines for Harley Davidson® big twins and engines with S&S® 4-1/4" bore Hot Set Up installed
2.000" intake and 1.605" exhaust valves coupled with S&S® ports, supply plenty of air for these big motors
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
Manifold mounting surface is machined to stock dimensions
Made in the USA
A special manifold/throttle body is required for engines that are not stock height.
Not machined for compression releases.
Must use S&S valve cover gasket kit with stock rocker covers.
Not compatible with '14-'16 FLHTK/FLHTKL, FLHTCUTG Twin-Cooled motors or '17 touring models.