Cometic C4574-056 MLS Head Gasket for 2004-2017 Subaru WRX/STI

Vehicle Fitment

• 2004-2017 Subaru WRX/STI (Turbocharged, 2.5L EJ255/EJ257, AWD)
• 2005-2013 Subaru Forester XT (Turbocharged, 2.5L EJ255/EJ257, AWD)
• 2004-2006 Subaru Baja Turbo (Turbocharged, 2.5L EJ255/EJ257, AWD)
• 2006-2006 Saab 9-2X Aero (Turbocharged, 2.5L EJ255/EJ257, AWD)

Fitment Notes

• Compatible with EJ255 Version 2 and EJ257 engines only
• Fits AWD drivetrain models exclusively
• Not compatible with non-turbo or other Subaru engine variants
• Does not fit Legacy, Outback, or other Subaru models

Features

• Multi-Layer Steel (MLS) construction for superior sealing
• Viton rubber coating on outer layers enhances seal durability
• Engineered for high-pressure, turbocharged applications
• Five-layer steel design with embossed sealing beads
• Corrosion-resistant stainless steel layers for long life
• Symmetrical design allows easy installation without orientation concerns
• No additional sealants required with proper surface prep
• Maintains seal integrity under thermal and pressure cycling

Specifications

• Bore size: 101 mm
• Compressed thickness: 0.056 inches (1.42 mm)
• Material: Stainless steel MLS with Viton coating
• Position: Cylinder head gasket for turbocharged 2.5L engines
• Fits AWD Subaru WRX/STI, Forester XT, Baja Turbo, and Saab 9-2X Aero models

Included Components

• 1x Cometic C4574-056 MLS Head Gasket

Product Description

The Cometic C4574-056 MLS Head Gasket is a high-performance replacement gasket designed for Subaru's turbocharged 2.5L engines, including the EJ255 Version 2 and EJ257. This gasket fits WRX and STI models from 2004 to 2017, Forester XT models from 2005 to 2013, Baja Turbo models from 2004 to 2006, and the Saab 9-2X Aero from 2006, all equipped with AWD drivetrains.

Constructed with five layers of stainless steel and coated in Viton rubber, this gasket ensures a reliable and durable seal against high boost pressures and extreme thermal conditions common in turbocharged engines. Its symmetrical design simplifies installation and requires no additional sealants when proper surface preparation is performed.

Ideal for performance enthusiasts and professionals maintaining or upgrading Subaru turbo engines, the C4574-056 provides exceptional sealing durability and longevity, helping to maintain engine integrity and performance during demanding driving conditions.