Cometic C5816-040 MLS Cylinder Head Gasket for Chevrolet Big Block Mark IV - V8

The Cometic C5816-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines. This precision gasket features a 4.320" bore diameter and a compressed thickness of .040", making it ideal for performance builds and high-compression applications.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability
• 4.320" bore diameter accommodates standard and slightly overbored big block engines
• .040" compressed thickness allows for precise compression ratio tuning
• Embossed stainless steel layers with proprietary coating ensure optimal combustion sealing
• Resists extreme temperatures and pressures in high-performance applications
• No retorquing required after initial installation

Cometic MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to create a gasket that conforms to imperfect sealing surfaces while maintaining exceptional blowout resistance. The .040" thickness makes this gasket suitable for engines with deck heights that require a thicker gasket to achieve desired compression ratios or accommodate mild deck surface irregularities.

Designed for race and street performance applications, this gasket delivers reliable sealing in demanding conditions where traditional composite gaskets may fail. Compatible with aluminum and cast iron cylinder heads when used with properly prepared surfaces.