Cometic C4157-040 MLS Cylinder Head Gasket Bore Mitsubishi - 85mm 4G63T

The Cometic C4157-040 is a high-performance Multi-Layer Steel (MLS) cylinder head gasket engineered specifically for the Mitsubishi 4G63T turbocharged engine found in Mitsubishi Evolution models IV through VIII. This gasket features an 85mm bore diameter and a compressed thickness of .040 inches (1.02mm), making it ideal for builds requiring precise compression control.

Key Features:

• Multi-Layer Steel (MLS) construction for superior sealing and durability under high boost and extreme cylinder pressures
• 85mm bore diameter optimized for the 4G63T DOHC turbocharged engine
• .040" (1.02mm) compressed thickness for compression ratio tuning
• Designed specifically for Mitsubishi Evolution 4, 5, 6, 7, and 8 models
• Stainless steel layers with advanced coating provide excellent combustion sealing and resistance to corrosion
• Engineered to handle high horsepower turbo applications and elevated cylinder pressures

Cometic MLS gaskets feature multiple layers of stainless steel with proprietary coatings that allow the gasket to recover and maintain torque retention even under extreme thermal cycling. This design eliminates the need for retorquing and provides exceptional durability in performance and racing applications. The .040" thickness makes this gasket thicker than OEM, which lowers compression ratio—beneficial for turbocharged applications running higher boost levels.