S&S Cycle Super Stock Cylinder Head Kit for Evolution Big Twin 1988-1999 - Part 90-1504

Product type: Top End Components

SKU : 0930-0008

Regular price $1,799.95 USD

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Cylinder Head Kit - Super Stock™ - Black - Evolution Big Twin '88-'99 Upgrade your Harley-Davidson Evolution Big Twin with the S&S...

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Cylinder Head Kit - Super Stock™ - Black - Evolution Big Twin '88-'99

Upgrade your Harley-Davidson Evolution Big Twin with the S&S Cycle Super Stock™ Cylinder Head Kit, part number 90-1504. Designed for engines from 1988 to 1999, this fully assembled head provides excellent performance and is compatible with stock 3-1/2" or 3-5/8" bore engines. Crafted in the USA, these heads feature high-quality stainless steel valves and high-lift springs capable of up to .640" lift, ensuring durability and power for high-performance builds. The large 2.000" intake and 1.605" exhaust valves, combined with high-flow ports, supply ample airflow to support big-inch engines and maximize horsepower and torque. The kit is designed for easy installation, requiring only the reuse of stock headbolts, and is compatible with various aftermarket upgrades. For optimal results, S&S Super Stock piston kits are recommended, while intake manifolds, pistons, and gasket kits are sold separately. These heads are an ideal upgrade for riders seeking increased performance and reliability in their Harley-Davidson Evolution Big Twin engines.

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