Cometic C5769-045 MLS Cylinder Head Gasket for Pontiac 400/428/455 V8 4.200" Bore

The Cometic C5769-045 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Pontiac 400, 428, and 455 cubic inch V8 engines. This gasket features a compressed thickness of .045 inches and is designed for a 4.200-inch bore diameter, making it ideal for both stock rebuilds and performance applications.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability
• 0.045-inch compressed thickness for precise compression ratio tuning
• 4.200-inch bore diameter accommodates stock and mild overbore applications
• Embossed stainless steel outer layers with a spring steel inner core
• Excellent resistance to extreme cylinder pressures and temperatures
• Superior gasket recovery and reusability compared to traditional composite gaskets
• Designed to maintain consistent clamping loads during thermal cycling

Cometic MLS gaskets are the choice of professional engine builders and performance enthusiasts who demand maximum reliability. The multi-layer design allows the gasket to adapt to minor surface imperfections while maintaining an effective seal under high compression and boost conditions. Compatible with aluminum and iron cylinder heads when surfaces are properly prepared to the manufacturer's specifications.