S&S Cycle Top End Kit - 3.4375-inch Bore for 74-inch Big Twin Engines (66-84) - Part Number 90-0097

Product type: Big Bore Kits

Vendor: S&S CYCLE

SKU : 0903-1269

Regular price $3,659.95 USD

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Top End Kit - 3.4375" Bore - 74" Big Twin '66-'84 Upgrade your Harley-Davidson Big Twin with the S&S Cycle Top End...

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Top End Kit - 3.4375" Bore - 74" Big Twin '66-'84

Upgrade your Harley-Davidson Big Twin with the S&S Cycle Top End Kit, designed for 74-inch engines from 1966 to 1984. This comprehensive kit includes S&S Shovelhead-style cylinder heads, providing reliable performance and classic styling. The set features stock bore cylinders, measuring 3-7/16 inches for 74-inch engines, ensuring a perfect fit for your vintage motorcycle. Forged pistons with an 8:1 compression ratio come pre-fitted to the cylinders, eliminating the need for machine work and minimizing installation downtime. The pistons include rings and wrist pins for easy assembly, and all necessary hardware, gaskets, manifold clamps, and seals are included for a complete installation.

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