Cometic C5249-023 MLS Cylinder Head Gasket Chevy Small Block Bore Thick - 4.200 023

The Cometic C5249-023 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This high-performance gasket features a 4.200-inch bore diameter and an ultra-thin .023-inch compressed thickness, making it ideal for high-compression performance builds and applications requiring precise deck height control.

Key Specifications:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.200-inch bore diameter accommodates overbored and stroker applications
• .023-inch compressed thickness for precise compression ratio tuning
• Designed for 18-degree and 23-degree cylinder head configurations
• Round bore design with integrated steam holes for proper coolant circulation
• Compatible with Chevrolet Gen-1 Small Block V8 engines (265, 283, 302, 305, 327, 350, 400)

Cometic's MLS gaskets feature multiple layers of stainless steel with proprietary coatings that provide exceptional resistance to extreme temperatures and pressures. The gasket's ability to micro-seal imperfections in the deck surface makes it a preferred choice for performance engines, forced induction applications, and high-RPM racing builds. The round bore configuration and factory steam hole placement ensure proper engine cooling and combustion sealing.

Applications: Designed for use with aftermarket performance heads featuring 18-degree or 23-degree valve angles, commonly found in high-performance small block Chevrolet builds. The oversized 4.200-inch bore accommodates engines with .030-inch or greater overbores.