JE Pro Seal GM LSX 4.150in 0.059in Headgasket - Left

This is the JE Pro Seal head gasket for GM LSX engines, specifically the left-side unit. It's designed with a 4.150-inch bore and a 0.059-inch thickness, intended to seal the combustion chamber and coolant passages between the cylinder head and the engine block. Proper sealing is crucial for maintaining compression and preventing coolant or oil leaks, which are vital for engine performance and longevity. JE Pro Seal gaskets are well-built for reliable sealing in demanding applications. The multi-layer steel (MLS) construction offers excellent durability and resistance to blowout under high cylinder pressures. This specific gasket is engineered to work with the unique sealing surface of GM LSX engines, ensuring a precise fit and consistent clamping force when installed correctly. Its 0.059-inch thickness is a common choice for stock or mildly modified LSX builds, helping to achieve the desired compression ratio. When installing this head gasket, ensure both the cylinder head and engine block surfaces are perfectly clean and flat. Refer to the manufacturer's installation instructions for proper torque sequences and specifications, as correct installation is key to the gasket's performance and lifespan.