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

The S&S Top End Kit restores or upgrades your top end with S&S engineering and quality.

Fits Harley-Davidson Touring (1966-1980), FX Big Twin (1971-1980) and Vintage (1966-1978) models. Check the fitment chart below to confirm your exact year and model.

• Includes a set of S&S Shovelhead-style cylinder heads, a pair of S&S stock bore cylinders (3-7/16" for 74" engines or 3-1/2" for 80"), forged 8:1 compression pistons complete with rings and wrist pins, manifold clamps, manifold seals, all required hardware, and gaskets
• Pistons are pre-fit to the cylinders, so there is no machine work to be done and very little down time
• Made in the USA