Cometic C5271-060 MLS Cylinder Head Gasket Chevy Small Block Bore - 4.125 060

The Cometic C5271-060 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This precision-manufactured gasket features a .060" compressed thickness and is designed for engines with a 4.125" bore diameter, making it ideal for performance builds and engine rebuilds requiring reliable sealing under high-stress conditions.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability compared to traditional composite gaskets
• 4.125" bore diameter accommodates standard and slightly overbored Small Block Chevy engines
• .060" compressed thickness allows for precise compression ratio tuning and deck height adjustments
• Valve pocketed bore design provides clearance for larger valves in performance cylinder heads
• Compatible with both 18-degree and 23-degree cylinder head designs
• Integrated steam holes for proper coolant circulation and heat management
• Embossed stainless steel layers with elastomeric coating ensure excellent combustion sealing

Cometic MLS gaskets are constructed using multiple layers of stainless steel with a proprietary coating that allows the gasket to adapt to minor surface imperfections while maintaining a reliable seal. This design makes them particularly well-suited for high-performance applications, turbocharged engines, and racing applications where cylinder pressures exceed stock levels. The gasket's ability to withstand extreme temperatures and pressures makes it a popular choice among engine builders and performance enthusiasts.

This gasket is designed for use with Generation 1 Small Block Chevy engines (1955-1991), including 265, 283, 302, 305, 307, 327, 350, and 400 cubic inch variants equipped with aftermarket performance heads featuring 18 or 23-degree valve angles.