Cometic C5273-086 MLS Cylinder Head Gasket Chevy Small Block Bore - for V8 4.200

The Cometic C5273-086 is a Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This precision gasket features a 4.200-inch bore diameter with a compressed thickness of .086 inches, making it ideal for performance builds requiring reliable sealing under high compression and boost conditions.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability compared to conventional composite gaskets
• 4.200-inch bore diameter accommodates stroked or over-bored small block configurations
• .086-inch compressed thickness allows for precise compression ratio tuning
• Designed for 18-degree and 23-degree cylinder head applications
• Valve pocketed bore design provides clearance for larger valves in performance heads
• Includes steam holes for proper coolant circulation
• Embossed stainless steel layers with Viton rubber coating ensure maximum conformability

Cometic MLS gaskets are the preferred choice for serious engine builders and racers who demand maximum sealing reliability in high-performance, turbocharged, and supercharged applications. The multi-layer design allows the gasket to conform to minor surface imperfections while maintaining excellent recovery properties through repeated heat cycles.