Cometic C5273-030 MLS Cylinder Head Gasket for Chevrolet Small Block - Gen-1 V8

The Cometic C5273-030 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 .030" compressed thickness and is designed to provide exceptional sealing under extreme combustion pressures and temperatures.

Key Specifications:

• Bore Size: 4.200 inches - ideal for stock or slightly overbored applications
• Gasket Thickness: .030 inches (compressed)
• Construction: Multi-Layer Steel (MLS) for superior durability and heat resistance
• Head Compatibility: 18-degree and 23-degree cylinder heads
• Valve Pocketed Design: Accommodates performance valvetrain components
• Steam Holes: Integrated for proper coolant circulation

Multi-Layer Steel Technology:

Cometic's MLS gaskets utilize multiple layers of stainless steel with a proprietary coating system that creates a micro-seal at the head-to-block mating surface. This design allows for engine movement and thermal expansion while maintaining a positive seal, making it ideal for high-performance, turbocharged, supercharged, and nitrous applications.

Applications:

This gasket is compatible with Chevrolet Gen-1 Small Block V8 engines including 262, 265, 267, 283, 302, 305, 307, 327, 350, and 400 cubic inch displacements with a 4.200" bore diameter. The valve-pocketed design provides clearance for aftermarket performance cylinder heads with 18-degree or 23-degree valve angles.

Installation Notes:

MLS gaskets require smooth deck surfaces with a surface finish of 50 RA or better for optimal sealing. No additional sealants are required or recommended. Follow proper torque specifications and sequences for your specific engine application.