For Harley Big Twin applications: for S&S T‑Series T2 and 4-1/4" Hot Set Up engines. Optimized airflow (2.000"/1.605" valves), springs for camshafts up to .650" lift. Compatible with stock rocker boxes, exhaust, and intake manifolds. Made in the USA. Not machined for compression releases; non-stock height: requires a dedicated intake manifold/throttle body; not compatible with Twin-Cooled 2014-2016 and 2017 Touring models.
Specifically developed for S&S® T-Series T2 long block engines intended for Harley-Davidson® Big Twin models, as well as for engines equipped with the S&S® Hot Set Up 4-1/4" bore kit.
2.000" intake and 1.605" exhaust valves, combined with S&S® ports, deliver optimal airflow for these large-displacement engines.
S&S® high-performance valve springs accommodate camshafts with lift up to .650".
Maintains compatibility with stock rocker covers, exhaust, and intake manifolds.
Manifold mounting surface machined to stock dimensions.
Made in the USA.
A specific manifold/throttle body is required for engines with non-stock height.
Not machined for decompression.
Use the S&S® rocker cover gasket kit with the stock rocker covers.
Not compatible with 2014–2016 FLHTK/FLHTKL and FLHTCUTG Twin-Cooled engines, or with 2017 Touring models.
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91 cc Super Stock® Cylinder Heads
For Harley Big Twin applications: for S&S T‑Series T2 and 4-1/4" Hot Set Up engines. Optimized airflow (2.000"/1.605" valves), springs for camshafts up to .650" lift. Compatible with stock rocker boxes, exhaust, and intake manifolds. Made in the USA. Not machined for compression releases; non-stock height: requires a dedicated intake manifold/throttle body; not compatible with Twin-Cooled 2014-2016 and 2017 Touring models.
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For Harley Big Twin applications: for S&S T‑Series T2 and 4-1/4" Hot Set Up engines. Optimized airflow (2.000"/1.605" valves), springs for camshafts up to .650" lift. Compatible with stock rocker boxes, exhaust, and intake manifolds. Made in the USA. Not machined for compression releases; non-stock height: requires a dedicated intake manifold/throttle body; not compatible with Twin-Cooled 2014-2016 and 2017 Touring models.