Cometic C5399-051 MLS Cylinder Head Gasket Chevy Small Block Bore - for V8 4.030

The Cometic C5399-051 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Generation 1 Chevrolet Small Block V8 engines with aftermarket cylinder heads. This precision gasket features a 4.030-inch bore diameter and a compressed thickness of .051 inches, providing excellent sealing and durability for high-performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and recovery properties
• 4.030-inch bore diameter to accommodate a variety of Small Block Chevy builds
• .051-inch compressed gasket thickness for precise compression ratio tuning
• Undersized water ports designed to allow custom port matching to aftermarket cylinder heads
• Designed for use with aftermarket cylinder heads on Gen-1 SBC engines
• Engineered to handle high cylinder pressures in performance and racing applications

Cometic's MLS gaskets feature multiple layers of stainless steel with a Viton rubber coating that provides exceptional sealing around combustion chambers, coolant passages, and oil galleries. The undersized water port design gives engine builders the flexibility to match-port the gasket to their specific aftermarket heads for optimal coolant flow. This gasket is ideal for street performance, drag racing, and road racing applications where reliable sealing under extreme conditions is critical.