Cometic C5413-040 MLS Cylinder Head Gasket for Chevrolet Small Block - Gen-1 V8

The Cometic C5413-040 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 .040" compressed thickness and is designed to provide superior sealing under extreme combustion pressures and temperatures.

Key Specifications:

• Compressed thickness: .040 inch (1.02mm)
• Bore diameter: 4.145 inches
• Multi-Layer Steel (MLS) construction for maximum durability
• Valve pocketed bore design for clearance
• Engineered for Vortec cylinder heads
• Compatible with Chevrolet Gen-1 Small Block V8 engines

Cometic's MLS head gaskets utilize multiple layers of stainless steel with a Viton rubber coating to create a superior seal that withstands extreme cylinder pressures and temperatures. The valve pocketed design provides necessary clearance for high-lift camshafts and larger valves commonly found in performance applications. The 4.145" bore size accommodates over-bored or stroker engine builds beyond the stock 4.00"-4.030" bore specifications.

This gasket is ideal for performance and racing applications where reliability and consistent sealing are critical. The MLS construction allows for minor surface imperfections while maintaining excellent conformability to the cylinder head and block mating surfaces.