Cometic C5474-089 MLS Head Gasket Chevy Small Block Bore Thick - 4.080 089

The Cometic Gaskets C5474-089 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet Generation 1 Small Block V8 engines. This precision gasket features a 4.080-inch bore diameter and .089-inch compressed thickness, making it ideal for performance builds and engine rebuilds requiring superior sealing capabilities.

Key Features:

• Multi-Layer Steel (MLS) construction for maximum durability and superior sealing under high compression and temperature conditions
• 4.080-inch bore diameter accommodates standard and slightly over-bored small block Chevy applications
• .089-inch (approximately .090-inch) compressed thickness allows for precise compression ratio tuning
• Valve pocketed bore design provides clearance for larger valves and prevents valve-to-gasket contact
• Specifically designed for Vortec cylinder heads with proper port alignment and water jacket sealing
• Embossed stainless steel layers with viton rubber coating ensure reliable sealing across the entire gasket surface

Cometic MLS gaskets are the preferred choice for high-performance and racing applications where conventional composite gaskets may fail. The multiple layers of stainless steel provide the ability to withstand extreme cylinder pressures while maintaining the flexibility needed to compensate for minor surface imperfections. Compatible with Chevrolet Gen-1 Small Block V8 engines including 262, 265, 267, 283, 302, 305, 307, 327, 350, and 400 cubic inch variants when equipped with compatible Vortec-style cylinder heads.