Cometic C5401-040 MLS Cylinder Head Gasket Chevy Small Block Bore Thick - 4.135 040

The Cometic C5401-040 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Generation 1 Chevrolet Small Block V8 engines. This precision-manufactured gasket features a compressed thickness of .040 inches and accommodates a 4.135-inch bore diameter, making it ideal for performance builds and engine rebuilds.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under high-performance conditions
• .040-inch compressed gasket thickness for precise deck height control
• 4.135-inch bore diameter designed for aftermarket cylinder heads
• Undersized water ports allow for custom port matching and flow optimization
• Engineered for Chevrolet Gen-1 Small Block V8 applications
• Advanced material composition resists blown head gaskets and combustion leaks

Cometic's MLS gaskets feature multiple layers of stainless steel with elastomeric coatings that adapt to surface imperfections and maintain a consistent seal across the entire combustion chamber. The undersized water ports give engine builders the flexibility to match-port the gasket to their specific cylinder head configuration, ensuring optimal coolant flow without compromising gasket integrity. This gasket is particularly well-suited for performance applications, forced induction builds, and high-compression engines where superior sealing is critical.