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Upgrade your Harley Davidson Twin Cam engine with the S&S Cycle 900-0349 Super Stock™ cylinder heads, engineered specifically for S&S T-Series T2 long block engines and compatible with S&S 4-1/4" bore Hot Set Up installations. These high-performance heads feature 2.000" intake and 1.605" exhaust valves, complemented by S&S ports that deliver a substantial airflow boost for larger, more powerful motors. Built in the USA with precision, these heads are designed to optimize airflow and valve operation, ensuring enhanced horsepower and torque. They are compatible with stock rocker boxes, exhaust, and intake manifolds, with the manifold mounting surface machined to stock dimensions for straightforward installation. The heads are equipped with S&S high-performance valve springs that support camshaft lift up to .650", allowing for aggressive cam profiles and improved valve timing. Please note that a special manifold or throttle body is required for engines that are not stock height, and these heads are not machined for compression releases. To ensure proper sealing and performance, use the S&S valve cover gasket kit with stock rocker covers. Designed for specific applications, these heads are not compatible with 2014-2016 FLHTK/FLHTKL, FLHTCUTG Twin-Cooled models, or 2017 touring models, making them ideal for customized or stock Harley Davidson builds seeking increased performance and durability.
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