Cometic C5747-027 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - ZL1 4.300

The Cometic C5747-027 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for Chevrolet ZL1 Mark-IV Big Block V8 engines. This precision-manufactured gasket features a 4.300-inch bore diameter and a compressed thickness of .027 inches, making it ideal for high-compression and forced induction applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.300-inch bore diameter optimized for big block Chevrolet engines
• .027-inch compressed thickness for precise compression ratio tuning
• Designed specifically for Chevrolet ZL1 Mark-IV Big Block V8 engines
• Exceptional resistance to extreme cylinder pressures and temperatures
• Embossed stainless steel layers with elastomeric coatings for maximum conformability

Cometic MLS gaskets utilize multiple layers of stainless steel with specialized coatings that allow the gasket to conform to minor surface imperfections while maintaining excellent recovery properties. This design provides superior sealing under extreme conditions, making these gaskets the preferred choice for high-performance street engines, racing applications, and engines running boost or nitrous oxide. The .027-inch thickness allows engine builders to fine-tune compression ratios for optimal performance.