Cometic C5641-070 MLS Cylinder Head Gasket GM Mercury Marine Gen-IV 4.600" Bore

The Cometic C5641-070 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM and Mercury Marine Gen-IV big block V8 engines. Designed for demanding marine and high-performance applications, this gasket features a 4.600-inch bore diameter and a compressed thickness of .070 inches, providing excellent sealing and durability under extreme conditions.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and heat resistance
• 4.600-inch bore diameter optimized for Gen-IV big block V8 engines
• .070-inch compressed gasket thickness for precise compression control
• Compatible with GM 1050 and Mercury Marine Gen-IV big block applications
• Includes provisions for 2 slotted lifter valley bolts
• Advanced material composition resists blowout and withstands high combustion pressures

Cometic gaskets are manufactured using proprietary materials and processes to ensure consistent quality and reliable performance. The MLS design allows the gasket to conform to head and block surfaces while maintaining excellent recovery properties, making it ideal for both stock and modified engine builds. This gasket is particularly well-suited for marine environments where durability and resistance to thermal cycling are critical.