Cometic C5817-060 GM Gen V/VI Big Block MLS Head Gasket Bore - V8 4.320

The Cometic C5817-060 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 .060-inch compressed thickness, providing exceptional sealing capability for demanding applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• .060-inch compressed gasket thickness for precise compression control
• 4.320-inch bore diameter engineered for GM Big Block V8 specifications
• Advanced materials resist extreme temperatures and pressures
• Designed to accommodate thermal expansion and engine movement
• Ideal for performance builds, boosted applications, and high-compression engines

Cometic's MLS gaskets utilize multiple layers of stainless steel with proprietary coatings to create a gasket that recovers quickly from thermal cycles and maintains consistent clamping force. This design ensures reliable sealing between the cylinder head and block, even under extreme racing conditions or high-boost forced induction applications.