Cometic C5637-070 MLS Cylinder Head Gasket GM Big Block V8 Gen-IV/V/VI 4.600" Bore

The Cometic C5637-070 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine Big Block V8 Gen-IV/V/VI engines. This high-performance gasket features a .070 inch compressed thickness and is designed to accommodate a 4.600 inch bore with 4 bolts in the lifter valley configuration.

Advanced MLS Construction:

• Comprised of multiple embossed layers of stainless steel for superior strength and durability
• Outer layers feature Viton rubber coating for exceptional sealing performance
• 5-layer construction provides increased rebound characteristics and corrosion resistance
• Valve pocketed bore shape for precise fitment

Performance Features:

• Provides maximum sealing performance for high-output marine and automotive engines
• Ideal for both aluminum-to-aluminum and aluminum-to-cast iron applications
• Withstands extreme cylinder pressures and shearing forces between dissimilar materials
• Viton coating is heat resistant up to 482°F (250°C)
• No sealants required - gasket installs dry

Cometic MLS gaskets are the preferred choice for professional engine builders and marine applications where reliability is critical. The stainless steel construction offers superior rebound properties compared to traditional gasket materials, ensuring a consistent seal even under demanding conditions.