Cometic C5769-040 MLS Cylinder Head Gasket Pontiac Bore - 400 428 455 V8 4.200

The Cometic C5769-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Pontiac 400, 428, and 455 cubic inch V8 engines. This precision-manufactured gasket features a 4.200-inch bore diameter and a compressed thickness of .040 inches, making it ideal for both stock and modified applications.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• 4.200-inch bore diameter optimized for Pontiac big-block V8 engines
• .040-inch compressed thickness allows for precise compression ratio tuning
• Stainless steel construction resists corrosion and maintains seal integrity through repeated heat cycles
• Embossed sealing beads around combustion chambers, coolant, and oil passages ensure leak-free performance
• Compatible with aluminum and cast iron cylinder heads

Cometic MLS gaskets are a preferred choice for performance engine builds, offering exceptional blowout resistance and the ability to withstand higher boost levels in forced induction applications. The multiple layer design allows the gasket to conform to minor surface imperfections while maintaining optimal clamping force, making it suitable for both street and racing applications.