Cometic C5434-089 MLS Cylinder Head Gasket Chevy Big Block Bore - for V8 4.630

The Cometic C5434-089 is a Multi-Layer Steel (MLS) cylinder head gasket engineered for Chevrolet Mark-IV and GM Gen-V/VI Big Block V8 engines. This precision-manufactured gasket features a .089" compressed thickness and is designed for a 4.630" bore size, making it ideal for custom engine builds and performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.630" bore diameter accommodates various big block configurations
• .089" compressed thickness provides optimal compression ratio tuning
• Undersized water ports allow for custom port matching and optimization
• Designed specifically for aftermarket cylinder heads
• Compatible with Chevrolet Mark-IV, GM Gen-V, and Gen-VI Big Block V8 engines

Cometic's MLS gasket technology uses multiple layers of stainless steel with an elastomeric coating to provide maximum combustion sealing in high-performance and racing applications. The undersized water ports give engine builders the flexibility to custom-match coolant passages to specific head and block combinations, ensuring proper coolant flow for your specific build. This gasket is an excellent choice for builders seeking precise control over compression ratios and cooling system optimization in big block Chevy applications.