16770-66-S Shovel head & base gasket set. 3-5/8" big bore

When you are building a high-performance Shovelhead with 3-5/8 inch big bore cylinders, you need gaskets that can handle the extra pressure. This James Gaskets kit includes two cylinder head gaskets and two cylinder base gaskets, providing everything needed to service one engine. The head gaskets feature a .045-inch blue PTFE coating for a superior seal, while the base gaskets are made from .030-inch high-quality paper. This kit is specifically designed for 1966 to 1984 Shovelhead models running big bore setups. James Gaskets are the industry standard for reliability, ensuring your top end stays leak-free under the most demanding conditions.