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Upgrade your Big Twin with the S&S CYCLE Super Stock® Cylinder Head Kit, part number 90-1497, designed for optimal performance and durability. These heads come fully assembled with valve seats, valves, guides, seals, and .590" lift valve springs, ensuring a straightforward installation process. The kit also includes collars and valve keepers, along with essential gaskets such as rocker cover gaskets, head gaskets, exhaust flange gaskets, and hardware for rocker housings, top engine mount, and carb support bracket, all accompanied by detailed instructions. Built to maintain a stock appearance, these heads offer improved airflow and performance over original factory components, allowing for better engine efficiency without compromising the classic look. They are designed to use OEM manifolds and exhaust systems, making them an excellent upgrade for riders seeking reliable enhancement while preserving compatibility. Made in the USA, these cylinder heads combine quality craftsmanship with enhanced functionality for your Big Twin motorcycle.
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