Cometic C4623-040 MLS Cylinder Head Gasket for Subaru - EZ30D

The Cometic C4623-040 is a Multi-Layer Steel (MLS) cylinder head gasket specifically engineered for the Subaru EZ30D Mark II engine. This precision-manufactured gasket features a 90mm bore diameter and .040" (1.0mm) compressed thickness, designed for the left-hand side (LHS) cylinder bank.

Key Specifications:

• Application: Subaru EZ30D Mark II engine, left-hand side
• Bore diameter: 90mm
• Compressed thickness: .040 inch (1.0mm)
• Construction: Multi-Layer Steel (MLS) technology
• OEM+ sealing performance for reliability

Multi-Layer Steel Construction:

Cometic's MLS gaskets feature multiple layers of stainless steel with a proprietary coating, providing superior sealing under extreme conditions. The MLS design accommodates cylinder head movement and thermal expansion while maintaining a consistent seal. This construction offers excellent resistance to heat, pressure, and corrosion, making it ideal for both stock and performance applications.

Benefits:

• Enhanced sealing performance over conventional gaskets
• Accommodates thermal expansion and head movement
• Resists blowout under high combustion pressures
• Reusable in many applications when properly maintained
• Suitable for stock, performance, and forced induction builds

This gasket is sold individually for the left-hand cylinder bank. A matching right-hand side gasket is required for complete engine assembly. Cometic Gaskets are manufactured in the USA and trusted by engine builders, racers, and OE manufacturers worldwide.