Cometic C5403-036 MLS Cylinder Head Gasket Bore Chevy Small Block - 4.200 036

The Cometic C5403-036 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This precision-manufactured gasket features a 4.200-inch bore diameter and a compressed thickness of .036 inches, making it ideal for high-performance and racing applications where precise combustion sealing is critical.

Key Features:

• Multi-Layer Steel construction provides superior sealing and durability under extreme cylinder pressures
• 4.200" bore diameter accommodates a wide range of small block Chevy builds
• .036" compressed thickness allows for precise compression ratio tuning
• Undersized water ports designed for aftermarket cylinder heads, allowing customization to match specific head port configurations
• Constructed with multiple layers of stainless steel with elastomeric coatings for optimal sealing
• Suitable for boosted, nitrous, and naturally aspirated high-performance applications

Cometic MLS gaskets are the preferred choice of professional engine builders and racers who demand maximum reliability and performance. The undersized water ports on this gasket provide the flexibility to machine or customize the port openings to perfectly match your aftermarket heads, eliminating potential leak paths and ensuring proper coolant flow. Compatible with Gen-1 Small Block Chevy engines including 265, 283, 302, 327, 350, and 400 cubic inch variants when equipped with aftermarket cylinder heads.