Cometic C5640-075 MLS Cylinder Head Gasket GM Mercury Marine Gen-IV Big Block - 1050

The Cometic C5640-075 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM/Mercury Marine 1050 Gen-IV big block V8 engines. This gasket features a compressed thickness of .075 inches and a 4.580-inch bore, designed to provide superior sealing performance in demanding marine applications.

Key Features:

• Multi-Layer Steel construction with 3-5 layers of spring stainless steel for enhanced durability
• Viton-coated outer layers create a superior seal against combustion gases and fluids
• Designed with 2 slotted lifter valley bolts for proper installation and alignment
• Excellent rebound characteristics maintain sealing force under extreme conditions
• Reduces bore distortion while withstanding extreme cylinder pressures
• Pre-coated with sealant - install dry without additional sealers

Cometic MLS gaskets are specifically designed to handle the unique challenges of marine engines, including higher moisture levels, varying operating temperatures, and extended periods at high RPM. The spring stainless steel construction provides a stronger base material than conventional head gaskets, while the embossed layers ensure optimal sealing across the entire surface. Sold individually.