Cometic C5331-030 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - 4.630

The Cometic C5331-030 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Mark IV Big Block V8 engines with a 4.630" bore diameter. This .030" thick gasket utilizes Cometic's advanced MLS technology to provide superior sealing under extreme combustion pressures and temperatures.

Key Features:

• Multi-Layer Steel construction with multiple layers of stainless steel for maximum durability
• .030" compressed thickness for precise deck height control
• 4.630" bore diameter designed for stock and slightly overbored applications
• Engineered for Chevrolet Mark IV Big Block V8 engines (396, 402, 427, 454 CID)
• Viton rubber sealing beads around combustion chambers and fluid passages
• Embossed stainless steel layers provide micro-sealing at the surface level
• Reusable in most applications with proper installation
• Handles high cylinder pressures in performance, racing, and forced induction applications

Cometic MLS gaskets are the preferred choice for engine builders seeking maximum reliability in high-performance and racing applications. The multi-layer design allows the gasket to conform to imperfect sealing surfaces while maintaining excellent combustion sealing and resisting blow-out. Proper surface preparation with RA 50-60 finish is recommended for optimal performance.