Cometic C5432-066 MLS Cylinder Head Gasket Bore Chevy Big Block - 4.310 066

The Cometic C5432-066 is a premium multi-layer steel (MLS) cylinder head gasket engineered for Chevrolet Mark-IV and GM Gen-V/VI big block V8 engines. This high-performance gasket features a .066-inch compressed thickness and is designed with a 4.310-inch bore diameter, making it ideal for custom engine builds and performance applications.

Key Features:

• Multi-layer steel construction provides superior sealing and durability under extreme cylinder pressures
• 4.310-inch bore diameter accommodates various big block configurations
• .066-inch compressed thickness for precise compression ratio tuning
• Designed for aftermarket cylinder heads with undersized water ports that allow for custom porting and coolant passage optimization
• Compatible with Chevrolet Mark-IV, GM Gen-V, and Gen-VI big block V8 engines
• Cometic's MLS technology ensures consistent clamping pressure and excellent recovery characteristics

This gasket is specifically engineered for enthusiasts and engine builders who require the flexibility to customize water jacket routing on aftermarket heads. The undersized water ports provide the ability to match-port coolant passages to your specific cylinder head design, ensuring optimal cooling performance in high-output applications.