Cometic C9951-056 HD Big Bore Top End Gasket Kit MLS Head Gasket - 1550cc 056

The Cometic C9951-056 is a high-performance top end gasket kit designed for 1999 and later Harley-Davidson Twin Cam engines with 1550cc big bore cylinders. This Heavy Duty (HD) kit features Cometic's advanced Multi-Layer Steel (MLS) head gasket technology with a .056-inch compressed thickness, engineered to handle the increased cylinder pressures of big bore applications.

Key Features:

• Multi-Layer Steel (MLS) head gasket construction for superior sealing and durability
• .056-inch compressed gasket thickness for precise compression ratio control
• Designed specifically for 1550cc big bore Twin Cam applications
• Includes complete top end gasket set for comprehensive engine sealing
• Premium gasket materials resist high temperatures and combustion pressures
• Engineered for 1999-up Twin Cam engines with EST (Electronic Sequential Port Fuel Injection)

Cometic gaskets are manufactured using advanced materials and precision processes to ensure consistent quality and reliable performance in demanding high-performance and racing applications. This kit provides everything needed to properly seal your big bore top end during rebuilds or performance upgrades.