Cometic C9976-045 HD Top End Gasket Kit Bore Head Gasket - 4-1/8 045

The Cometic C9976-045 is a complete top end gasket kit designed for 1999 and newer Harley-Davidson Evolution engines with 4-1/8" bore cylinders. This heavy-duty EST (Extreme Sealing Technology) kit features Cometic's premium multi-layer steel (MLS) head gaskets with .045" thickness for optimal sealing and durability in high-performance applications.

Key Features:

• MLS head gaskets with .045" compressed thickness for superior sealing
• .020" base gaskets included for proper compression management
• 4-1/8" cylinder bore size for big bore applications
• EST (Extreme Sealing Technology) construction resists blowout and leakage
• Complete top end and base gasket kit for hassle-free installation
• Precision-cut from premium materials for consistent quality
• Designed for 1999-up Harley-Davidson Evolution engines

Cometic gaskets are engineered to withstand extreme cylinder pressures and temperatures, making them ideal for performance builds and stock rebuilds alike. The multi-layer steel construction provides excellent recovery characteristics and maintains seal integrity through repeated heat cycles.