4.100 MLS Head Gasket .027 - Ford 351C/400M

The 4.100 MLS Head Gasket .027 for Ford 351C/400M is a precision-engineered gasket designed for vintage muscle car builders and classic engine rebuilders working with mid-block Ford big-block platforms. This multi-layer steel (MLS) gasket seals the critical interface between the cylinder head and engine block, preventing combustion gases and coolant from leaking into the oil galleries, which is crucial for maintaining engine integrity.

Cometic's MLS construction utilizes layered stainless steel and elastomer material to provide superior sealing performance compared to traditional composite gaskets. The .027-inch thickness is specifically designed to work with a 4.100-inch bore diameter and the combustion chamber geometry of the 351C and 400M engine families. This gasket is engineered to resist deformation under load and accommodate the natural expansion and contraction during temperature changes.

Engine builders and restorers will find this gasket a reliable choice for head gasket replacement in Ford 351C and 400M engines. It is suitable for various applications, including refreshing original hardware or assembling a newly bored short-block. Proper installation is essential to ensure optimal performance and longevity.