Cometic C5645-051 GM MLS Head Gasket Bore - LT1/LT4 Gen-2 V8 4.040

The Cometic C5645-051 is a precision-engineered Multi-Layer Steel (MLS) cylinder head gasket designed specifically for GM LT1 and LT4 Generation 2 small block V8 engines. This gasket features a 4.040-inch bore diameter and .051-inch compressed thickness, providing exceptional sealing performance for both stock and modified applications.

Key Features:

• Multi-Layer Steel (MLS) construction for superior durability and heat resistance
• 4.040-inch bore diameter accommodates standard and slightly overbored cylinders
• .051-inch compressed thickness allows for precise compression ratio tuning
• Engineered specifically for GM LT1/LT4 Gen-2 small block V8 engines
• Stainless steel layers with elastomeric coating ensure optimal sealing
• Ideal for high-performance, turbocharged, and supercharged applications

Cometic gaskets are manufactured using advanced materials and processes to handle extreme cylinder pressures and temperatures. The MLS design provides multiple layers of embossed stainless steel with a polymer coating that micro-seals surface imperfections, making these gaskets highly resistant to blowouts and combustion gas leakage. This gasket is perfect for engine rebuilds, performance upgrades, or forced induction setups where reliable head sealing is critical.