Cometic C5817-051 GM Gen V/VI Big Block MLS Cylinder Head Gasket Bore - V8 4.320

The Cometic C5817-051 is a precision-engineered Multi-Layer Steel (MLS) cylinder head gasket designed specifically for GM Generation V and VI Big Block V8 engines. This high-performance gasket features a 4.320-inch bore diameter and a compressed thickness of .051 inches, providing optimal sealing for big block applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior durability and sealing
• 4.320-inch bore diameter engineered for GM Big Block V8 specifications
• .051-inch compressed thickness for precise compression control
• Compatible with GM Generation V and VI Big Block engines
• Advanced materials resist temperature extremes and combustion pressures
• Engineered to accommodate engine movement and thermal expansion

Cometic MLS gaskets utilize multiple layers of stainless steel with specialized coatings to create a reliable seal between the cylinder head and engine block. The embossed layers provide multiple sealing points while maintaining the flexibility needed to adapt to imperfect mating surfaces and thermal cycling during operation.