Cometic C9902-040 MLS Head Base Gasket Kit Bore Twin Cam - 3.938 040

The Cometic C9902-040 MLS (Multi-Layer Steel) head and base gasket kit is engineered specifically for Harley-Davidson Revolution Twin Cam engines with a 3.938" bore diameter. This complete gasket kit features Cometic's premium .040" thick MLS gasket technology, designed to provide superior sealing performance in high-performance and modified engine applications.

Key Features:

• Multi-Layer Steel construction for maximum durability and blow-out resistance
• 3.938" bore diameter for precise fitment
• .040" compressed thickness provides optimal compression ratio tuning
• Includes both head and base gaskets for complete top-end sealing
• Advanced coating technology ensures excellent heat resistance and sealing
• Designed for twin-cooled Revolution engines
• Eliminates the need for additional sealants

Cometic MLS gaskets feature multiple layers of stainless steel with elastomeric coatings that allow the gasket to conform to slight imperfections in the sealing surface. This design provides superior blowout resistance and maintains consistent sealing pressure across the entire gasket surface, making them ideal for high-compression, turbocharged, or nitrous applications where stock gaskets may fail.