Cometic C5817-080 GM Gen V/VI Big Block Cylinder Head Gasket Bore MLS - V8 4.320 080

The Cometic C5817-080 is a premium Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM Generation V and VI Big Block V8 engines. This high-performance gasket features a 4.320-inch bore diameter and .080-inch compressed thickness, providing exceptional sealing capabilities for both stock and modified applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior durability and conformability
• 4.320-inch bore diameter optimized for GM Big Block V8 applications
• .080-inch compressed thickness for precise combustion chamber sealing
• Compatible with GM Generation V and VI Big Block engines
• Engineered to withstand extreme cylinder pressures and temperatures
• Provides excellent rebound characteristics and recovery under thermal cycling

Cometic MLS gaskets feature multiple layers of stainless steel with embossed sealing beads that allow the gasket to conform to surface imperfections while maintaining superior sealing pressure. This design makes them ideal for high-performance, turbocharged, supercharged, and nitrous applications where cylinder pressure and heat are elevated beyond stock levels.