S&S CYCLE Super Stock® Cylinder Head Kit — 3-5/8" bore, single spark plug, aluminum – 66-78 Big Twin

Heads come completely assembled with valve seats, valves, guides, seals, .590" lift valve springs, collars and valve keepers.

The kit also includes rocker cover gaskets, head gaskets, exhaust flange gaskets and hardware for rocker housings, top engine mount and carb support bracket, and instructions for installation.

These heads maintain a stock appearance while flowing better than stock, and are designed for use with OEM manifolds and exhaust.

Made in the USA. Machined for one spark plug per head and accepts 3-5/8" bore cylinders; cylinder heads are original equipment on S&S® SH-Series engines and make a great upgrade for stock shovelheads.

Rocker boxes are fastened with 5/16"-18 cap screws instead of the stock studs and nuts.

Kit includes:

• Front and rear cylinder head assemblies
• Rocker box gaskets
• Copper head gaskets
• Exhaust gaskets
• Hardware
• Instructions