Cometic C9976-051 HD Top End Gasket Kit Bore Head Gasket - 4-1/8 051

The Cometic C9976-051 is a premium heavy-duty top end gasket kit designed for 1999 and newer Harley-Davidson Evolution and Twin Cam engines with 4-1/8" bore cylinders. This comprehensive EST (Engine Sealing Technology) kit includes a .051" thick MLS (Multi-Layer Steel) head gasket and .020" base gasket for precise sealing and compression control.

Key Features:

• MLS head gasket construction with .051" thickness for superior sealing and durability
• 4-1/8" bore size designed for big bore applications
• .020" base gasket included for proper engine timing and clearance
• Complete top end sealing kit with all necessary gaskets and o-rings
• Heavy-duty construction built to withstand high compression and extreme temperatures
• Cometic's EST technology ensures optimal combustion sealing

This kit provides everything needed for a complete top end rebuild or refresh, delivering race-proven performance and reliability. Cometic gaskets are manufactured using advanced materials and precision processes to meet the demands of high-performance V-Twin engines.