Cometic C5255-092 MLS Cylinder Head Gasket for Chevy W-Series Big Block - 348/409

The Cometic C5255-092 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet 348 and 409 cubic inch W-Series Big Block V8 engines. This precision gasket features a 4.200-inch bore diameter and .092-inch compressed thickness, making it ideal for performance builds and engines operating at elevated compression ratios.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• .092-inch (2.34mm) compressed thickness for precise compression control
• 4.200-inch bore diameter designed for 348/409 W-Series engine blocks
• Advanced embossment design provides optimal combustion seal
• Viton rubber bonded to the outer layers for enhanced oil and coolant sealing
• Resists blowout and withstands extreme cylinder pressures
• Suitable for street performance, racing, and high-boost applications

Cometic MLS gaskets are constructed from multiple layers of stainless steel, allowing them to conform to imperfect sealing surfaces while maintaining excellent recovery properties. The embossed layers provide multiple sealing points around combustion chambers, oil passages, and coolant jackets. This gasket is designed for use with properly prepared cylinder heads and deck surfaces for optimal performance and longevity.