Cometic C5640-084 MLS Cylinder Head Gasket GM Mercury Marine Gen-IV Big Block

The Cometic C5640-084 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine Gen-IV 1050 cubic inch big block V8 engines. This precision gasket features a .084-inch compressed thickness and is designed to accommodate a 4.580-inch bore diameter, providing exceptional sealing performance in demanding marine and high-performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior strength and durability
• .084-inch (2.13mm) compressed gasket thickness
• 4.580-inch bore diameter for proper cylinder sealing
• Includes two slotted lifter valley bolt holes for secure mounting
• Engineered for GM/Mercury Marine Gen-IV big block V8 engines
• Designed for 1050 cubic inch displacement applications
• Embossed stainless steel layers with proprietary coatings for optimal sealing

Cometic's MLS head gaskets utilize multiple layers of stainless steel with advanced embossments and coatings to create a superior seal that can withstand extreme cylinder pressures and temperatures. The design compensates for minor surface imperfections while maintaining excellent recovery characteristics, making this gasket ideal for both high-performance marine engines and demanding racing applications.