Cometic C9253-040 100mm Big Bore Gasket Kit for Harley Twin Cam .040" MLS

The Cometic C9253-040 is a high-performance Multi-Layer Steel (MLS) head and base gasket kit engineered for 100mm big bore applications on Harley-Davidson Twin Cam engines. This complete gasket kit features Cometic's proven .040" (1.0mm) compressed thickness design with integrated O-ring sealing technology for maximum cylinder sealing and reliability under high-performance conditions.

Key Features:

• Multi-Layer Steel construction provides superior sealing and durability compared to composite gaskets
• 100mm bore size specifically designed for big bore cylinder applications
• .040" compressed gasket thickness for precision compression ratio tuning
• Integrated O-ring design ensures exceptional sealing at cylinder head and base interfaces
• Includes both head and base gaskets for complete top-end rebuild
• Engineered to withstand extreme temperatures and cylinder pressures
• Compatible with Harley-Davidson Twin Cam engines with 100mm cylinders

Cometic MLS gaskets are the preferred choice of engine builders and performance enthusiasts for their ability to maintain consistent sealing through heat cycles and high compression applications. The .040" thickness allows builders to fine-tune compression ratios when combined with cylinder head milling or piston selection.