Cometic C5746-066 MLS Cylinder Head Gasket for Chevy ZL1 Mark IV Big Block V8 4.250" Bore

The Cometic C5746-066 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet ZL1 Mark-IV Big Block V8 engines. This high-performance gasket features a 4.250-inch bore diameter and a compressed thickness of .066 inches, providing an optimal seal for high-compression and high-horsepower applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.250-inch bore diameter designed for ZL1 Mark-IV Big Block V8 engines
• .066-inch compressed thickness for precise compression control
• Engineered to withstand extreme cylinder pressures and temperatures
• Excellent recovery properties that maintain seal integrity through heat cycles
• Ideal for performance and racing applications

Cometic's MLS gaskets feature multiple layers of stainless steel with proprietary coatings that ensure maximum sealing performance. The gasket's ability to rebound and maintain contact pressure makes it ideal for aluminum heads on cast iron blocks, or aluminum-to-aluminum applications where thermal expansion can compromise inferior gaskets.