Cometic C5433-086 MLS Cylinder Head Gasket Chevy Big Block Bore - for V8 4.570

The Cometic C5433-086 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines. This precision-manufactured gasket features a .086" compressed thickness and accommodates a 4.570" bore size, making it ideal for performance and racing applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability under high cylinder pressures
• .086" (2.18mm) compressed gasket thickness
• 4.570" bore diameter designed for aftermarket cylinder heads
• Undersized water ports allow for custom port matching and coolant flow optimization
• Compatible with Chevrolet Mark-IV, GM Gen-V, and Gen-VI Big Block V8 engines
• Engineered to withstand extreme temperatures and pressures in forced induction and high-compression applications

Cometic's MLS gaskets feature multiple layers of stainless steel with a Viton rubber coating, providing exceptional conformability to sealing surfaces while maintaining the strength needed for high-performance engines. The undersized water ports on this gasket give engine builders the flexibility to match-port the gasket to their specific cylinder head configuration, ensuring optimal coolant flow and eliminating potential hot spots.