Cometic C5846-045 MLS Cylinder Head Gasket Pontiac Bore - 400/428/455 V8 4.380

The Cometic C5846-045 is a premium multi-layer steel (MLS) cylinder head gasket engineered specifically for Pontiac 400, 428, and 455 cubic inch V8 engines. This high-performance gasket features a 4.380-inch bore diameter and a compressed thickness of .045 inches, providing an excellent balance of sealing capability and compression optimization.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.380-inch bore diameter designed for Pontiac big block V8 engines
• .045-inch compressed thickness for precise compression control
• Accommodates thermal expansion and cylinder head movement
• Resists combustion pressure and maintains seal integrity under extreme conditions
• Compatible with Pontiac 400, 428, and 455 cubic inch V8 engines

Cometic MLS gaskets utilize multiple layers of stainless steel with advanced coating technology to create a gasket that conforms to imperfections in the sealing surface while maintaining exceptional strength. This design makes them ideal for both stock rebuilds and high-performance applications where cylinder pressures and temperatures exceed factory specifications. The .045-inch thickness allows engine builders to fine-tune compression ratios for optimal performance.