4.100 MLS Head Gasket .070 GM LS1/LS2/LS3/LS6

The Cometic Gaskets 4.100 MLS Head Gasket .070 is a multi-layer steel cylinder head gasket engineered for GM LS-series engines, including LS1, LS2, LS3, and LS6 platforms. This gasket delivers critical sealing performance between the cylinder head and engine block, where combustion pressures and thermal cycling demand precision engineering and material integrity. The .070-inch compression thickness and 4.100-inch bore diameter are factory-specification dimensions designed to maintain OEM clearances and sealing surfaces.

Cometic's multi-layer steel (MLS) construction provides superior gasket durability compared to traditional composite designs. MLS gaskets accommodate engine block and head surface variations while resisting blow-by at high combustion pressures. The .070-inch thickness is critical to maintaining proper valve timing geometry and spark plug reach, making bore and compression thickness tolerances non-negotiable for LS-series engine builds. Each gasket is manufactured to tight tolerances and arrives as a single unit for straightforward installation.

This gasket is required for LS-series engine assembly, overhaul, or head removal and replacement. Whether restoring an original engine, upgrading to a newer LS variant, or rebuilding after performance modifications, a precision head gasket is essential to prevent coolant and oil seepage, maintain compression ratios, and ensure long-term reliability. Cometic Gaskets is recognized across automotive and racing communities for gasket quality and consistency, making this OEM-equivalent component a trusted choice for engine builders and technicians working on LS platforms.