Cometic C4264-027 MLS Head Gasket 100mm .027 for Subaru EJ25 2.5L EJ257 DOHC

Vehicle Fitment

• 1996-1999 Subaru Legacy (GT, LSi, Outback, AWD/FWD, 2.5L H4 EJ25D DOHC 16V)
• 1999-2004 Subaru Legacy (L, GT, Outback, AWD, 2.5L H4 EJ251 SOHC 16V)
• 2000-2002 Subaru Legacy / Outback (AWD, 2.5L H4 EJ252 SOHC 16V - California emissions)
• 1998-1999 Subaru Impreza (L, Outback Sport, AWD/FWD, 2.5L H4 EJ25D DOHC 16V)
• 1999-2004 Subaru Impreza (L, Outback Sport, RS, AWD/FWD, 2.5L H4 EJ251 SOHC 16V)
• 1997-1998 Subaru Forester (L, S, AWD, 2.5L H4 EJ25D DOHC 16V)
• 1999-2004 Subaru Forester (L, S, AWD, 2.5L H4 EJ251 SOHC 16V)
• 1996-1999 Subaru Outback (AWD, 2.5L H4 EJ25D DOHC 16V)
• 2000-2004 Subaru Outback (AWD, 2.5L H4 EJ251 SOHC 16V)
• 2003-2005 Subaru Baja (AWD, 2.5L H4 EJ251 SOHC 16V)
• 2004-2006 Subaru Impreza WRX STI (AWD, 2.5L H4 EJ257 DOHC 16V Turbo)
• 2004-2006 Subaru Forester XT (AWD, 2.5L H4 EJ255 / EJ257 DOHC 16V Turbo)
• 2005-2006 Subaru Legacy GT (AWD, 2.5L H4 EJ255 Version 1 DOHC 16V Turbo)
• 2004-2006 Subaru Baja Turbo (AWD, 2.5L H4 EJ255 DOHC 16V Turbo)

Fitment Notes

• Compatible with EJ25D, EJ251, EJ252, EJ253/EJ255 Version 1, and 2004-2006 EJ257 engine codes only
• EJ255 Version 2 (2007+) and EJ257 2007-2018 use a different part number (C4574 series) - not compatible with C4264-027
• EJ252 was a California-emissions-specific variant of the EJ251 - same bore and head gasket fitment confirmed
• The ultra-thin .027" thickness is designed for builds requiring minimal compression reduction or near-stock deck heights
• Does not fit EJ20 or EJ22 engines
• Sold individually - one gasket per listing (single cylinder bank); most builds require 2

Features

• Multi-Layer Steel (MLS) construction with three embossed stainless steel layers for precise, high-strength sealing
• Outer layers coated with Viton fluoroelastomer rubber - heat resistant up to 482°F (250°C)
• Ultra-thin .027" compressed profile ideal for performance builds with minimal head deck removal
• No sealant required and no re-torque necessary - installs dry
• Compatible with aluminum-to-aluminum and aluminum-to-cast-iron head/block configurations
• Embossed design distributes clamp load evenly to minimize bore distortion
• Precision 100mm bore for accurate fitment across the full EJ25 engine family
• Trusted by professional and amateur motorsport teams worldwide

Specifications

• Part Number: C4264-027
• Gasket Type: MLS (Multi-Layer Steel) Cylinder Head Gasket
• Bore Size: 100mm
• Compressed Thickness: 0.027 inches
• Engine Compatibility: Subaru EJ25D, EJ251, EJ252, EJ253, EJ255 Version 1, EJ257 (2004-2006), 2.5L SOHC/DOHC 16V
• Layers: 3-layer stainless steel construction
• Coating: Viton fluoroelastomer (both sides of outer layers)
• UPC: (per Cometic product listing)
• Position: Cylinder Head (single gasket)
• Drivetrain: AWD / FWD

Included Components

• 1x Cometic MLS Cylinder Head Gasket (C4264-027)

Product Description

The Cometic C4264-027 is a Multi-Layer Steel cylinder head gasket engineered for the broad Subaru EJ25 engine family, covering EJ25D, EJ251, EJ252, EJ253, EJ255 Version 1, and the 2004-2006 EJ257. With a 100mm bore and an ultra-thin 0.027-inch compressed thickness, it is purpose-built for performance engine builds where minimal material has been removed from the head or block surface, and where maintaining near-stock compression ratios is critical. It installs dry - no sealant or re-torque required.

The three-layer stainless steel construction with Viton-coated outer surfaces provides durable, leak-free sealing across a wide range of naturally aspirated and turbocharged EJ25 applications - from Legacy and Forester rebuilds to high-output STI and WRX performance builds. Whether you are addressing the well-known EJ25 head gasket failure on a daily driver or building a dedicated performance engine, the C4264-027 delivers the fitment accuracy and sealing reliability that Cometic is known for.