Cometic C5635-080 MLS Cylinder Head Gasket GM/Mercury Marine Gen-IV/V/VI Bore - 4.530

The Cometic C5635-080 is a Multi-Layer Steel (MLS) cylinder head gasket engineered for GM and Mercury Marine Big Block V8 Gen-IV, Gen-V, and Gen-VI engines. This precision-manufactured gasket features a .080" (2.0mm) compressed thickness and accommodates a 4.530" bore diameter, making it ideal for performance builds and marine applications requiring superior sealing capabilities.

Key Features:

• Multi-Layer Steel (MLS) construction provides exceptional durability and superior sealing under extreme cylinder pressures
• .080" compressed thickness for precise deck height and compression ratio tuning
• 4.530" bore diameter accommodates stock and modified big block configurations
• Compatible with 4-bolt lifter valley design for proper coolant and oil passage sealing
• Engineered specifically for GM/Mercury Marine Gen-IV, Gen-V, and Gen-VI big block V8 engines
• Stainless steel layers with advanced coating technology resist corrosion in marine environments

Cometic MLS gaskets feature multiple layers of stainless steel with proprietary coatings that allow micro-movement between layers while maintaining a superior seal. This design accommodates thermal expansion and engine movement better than traditional composite gaskets, making them the preferred choice for high-performance and marine applications where reliability is critical.