4.190 MLS Head Gasket .051 - GM LS1

The Cometic Gaskets 4.190 MLS Head Gasket .051 for GM LS1 is a multi-layer steel cylinder head gasket engineered for precision sealing in high-performance LS-series engine builds. This 0.051-inch compression thickness gasket is purpose-built to handle the demands of boosted applications, engine rebuilds, and performance upgrades where factory tolerances and original gasket materials fall short of sustained reliability.

Multi-layer steel (MLS) construction provides superior sealing integrity across varying clamping loads and thermal cycling compared to traditional composite designs. The 4.190-inch bore diameter is the standard specification for LS1 cylinder heads, and the 0.051-inch thickness sets the compression ratio relationship critical to engine tuning and power output. Cometic's precision manufacturing ensures consistent gasket thickness and proper surface contact, reducing the risk of combustion leakage that compromises efficiency and creates hot spots. This gasket is rated for both naturally aspirated and forced-induction applications, making it suitable for turbocharged or supercharged LS1 builds.

This gasket is essential for engine builders, performance shops, and LS1 enthusiasts performing head gasket replacement, engine reconditioning, or complete engine assembly. Whether addressing a blown head gasket, upgrading to higher compression, or building a reliable high-output engine, the correct MLS gasket specification is non-negotiable. The C5319-051 part number is the OE-equivalent replacement that meets or exceeds original specifications while offering the durability associated with quality aftermarket gasket manufacturing.

LS-series engines dominate the performance automotive market, and gasket selection directly impacts reliability and longevity. Cometic is recognized within the engine-building community for gasket consistency and quality control, making this a trusted choice for both street and race applications requiring dependable head sealing.