Cometic C5400-080 Chevrolet Small Block MLS Cylinder Head Gasket Bore - Gen-1 V8 4.125 080

The Cometic C5400-080 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines with aftermarket cylinder heads. This precision gasket features a 4.125-inch bore diameter and .080-inch compressed thickness, providing superior sealing performance for high-performance and racing applications.

Key Features:

• Multi-Layer Steel construction for maximum durability and superior sealing
• 4.125-inch bore diameter accommodates standard and modified engine configurations
• .080-inch (2.0mm) compressed gasket thickness allows for precise compression ratio tuning
• Undersized water ports designed specifically for aftermarket cylinder heads, allowing custom port matching
• Designed for Chevrolet Gen-1 Small Block V8 engines (265, 283, 302, 305, 327, 350, 400)
• MLS technology provides excellent recovery and maintains clamping force under extreme conditions

Cometic MLS gaskets feature multiple layers of stainless steel with special coatings that allow the gasket to adapt to surface imperfections while maintaining optimal sealing pressure. The undersized water ports are intentionally designed to allow engine builders to custom-match coolant passages to their specific aftermarket head configuration, ensuring proper coolant flow and preventing gasket intrusion into combustion chambers.