Cometic C5747-120 MLS Cylinder Head Gasket Chevy Big Block Mark IV Bore - ZL1 4.300

The Cometic C5747-120 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 .120-inch compressed thickness, making it ideal for high-compression and forced induction applications.

Key Features:

• Multi-Layer Steel (MLS) construction provides superior sealing and durability under extreme cylinder pressures
• 4.300-inch bore diameter accommodates stroker and overbore applications
• .120-inch (3.05mm) compressed thickness allows for precise compression ratio tuning
• Designed specifically for Chevrolet ZL1 Mark-IV Big Block V8 engines
• Exceeds OEM specifications for performance and racing applications
• Multiple layers of stainless steel with elastomeric coating ensure optimal combustion sealing

Cometic MLS gaskets are the preferred choice for engine builders and racers who demand maximum reliability and performance. The advanced multi-layer design allows the gasket to recover from extreme thermal cycling while maintaining consistent clamping pressure across the entire sealing surface. This gasket is engineered to withstand the demanding conditions of high-horsepower builds, turbocharger applications, and supercharged combinations.