Cometic C5645-080 GM Gen V Small Block MLS Head Gasket Bore - LT1/LT4 4.040

The Cometic C5645-080 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for GM LT1 and LT4 Generation V small block V8 engines. This gasket features a precision 4.040-inch bore diameter and .080-inch compressed thickness, providing optimal sealing and combustion chamber sealing for stock and modified applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability
• 4.040-inch bore diameter designed for GM LT1/LT4 Gen V engines
• .080-inch compressed thickness for precise compression control
• Engineered to withstand extreme cylinder pressures and temperatures
• Embossed stainless steel layers with Viton rubber coating for maximum sealing
• Ideal for performance builds, forced induction, and high-compression applications

Cometic MLS gaskets are the industry standard for engine builders seeking race-proven reliability. The multi-layer design allows the gasket to adapt to minor surface imperfections while maintaining consistent clamping force across the entire sealing surface, making this gasket suitable for both street and competition engines.