Cometic C9477 EST Top End Gasket Kit 3.75" Big Bore Harley Evolution Big Twin

The Cometic C9477 EST Top End Gasket Kit is engineered specifically for 1992-1998 Harley-Davidson Evolution Big Twin engines with 3.75-inch big bore cylinders. This comprehensive kit provides everything needed for a professional top end rebuild on modified displacement engines.

EST (Extreme Sealing Technology) Construction:

• Embossed stainless steel head, base, and rocker gaskets with proprietary rubber coating
• Advanced heat dissipation design draws heat away from combustion ring
• Eliminates hot spots that cause premature gasket failure
• Superior sealing for high-performance and high-compression applications

Complete Top End Kit Includes:

• Head gaskets designed for 3.75" bore diameter
• Base gaskets with steel construction and Viton coating
• Rocker box gaskets and seals
• All necessary O-rings, seals, and washers for complete installation

Cometic gaskets are proudly manufactured in the USA using premium materials designed to withstand extreme cylinder pressures, combustion temperatures, and clamp loads found in modern high-performance V-Twin engines. Ideal for big bore kits, performance builds, and complete top end rebuilds.