85.5mm MLS Head Gasket .051 - Mits 4G63/4G63TB

The Cometic Gaskets 85.5mm MLS Head Gasket .051 (C4233-051) is a multi-layer steel cylinder head gasket engineered specifically for Mitsubishi 4G63 and 4G63TB engines. This gasket delivers the sealing integrity required for both stock and modified four-cylinder applications, making it a critical component for anyone rebuilding or freshening a 4G63 engine block.

The 85.5mm bore diameter and 0.051-inch compression thickness are precision-engineered to match OEM specifications for proper combustion chamber volume and head gasket clamping load. Multi-layer steel construction provides superior durability compared to conventional gasket materials, offering better resistance to blow-by and gas leakage under sustained pressure. The gasket's design accommodates both stock and lightly boosted applications without compromise, maintaining a reliable seal across varying load conditions.

This gasket is essential for engine builders, performance enthusiasts, and repair technicians working on Mitsubishi 4G63 platforms—whether for Lancer Evolution, Mirage, or DSM applications. Proper head gasket selection is fundamental to preventing coolant and oil cross-contamination, maintaining cylinder compression, and ensuring engine longevity. The 4G63 remains popular in both street and track environments, and a quality gasket rated for the application is non-negotiable for reliable operation.

Cometic Gaskets is recognized in the automotive gasket industry for precision manufacturing and strict quality control. This head gasket is sold individually, allowing technicians to source exact replacements or maintain inventory for multiple builds. Always verify bore diameter and compression thickness against your engine's specifications before installation.