Cometic MLS Head Gasket 101mm .040in — Fits 2004-2010 Subaru EJ255/EJ257

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SKU: CGSC4574-040
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Watch in action

Precision Sealing for High-Performance Subaru Engines

The Cometic 101mm .040" MLS Head Gasket is the professional choice for Subaru EJ255 and EJ257 engine builds. Engineered to handle the rigors of forced induction, this multi-layer steel gasket provides the durability required for high-horsepower applications. By utilizing advanced metallurgy and a specialized Viton coating, it creates a superior seal that resists the extreme heat and pressure fluctuations common in turbocharged Subaru engines.

Why Choose Cometic MLS Gaskets?

  • Robust Construction: Multiple layers of stainless steel provide maximum strength and structural integrity.
  • Viton Rubber Coating: Provides a superior seal on both sides, ensuring heat resistance up to 250°C.
  • Ideal Fitment: Specifically sized at 101mm to accommodate common overbore requirements for EJ25 platforms.
  • Thermal Management: Designed to handle the shearing forces between aluminum cylinder heads and engine blocks.

This .040" thickness gasket is perfect for builders looking to fine-tune their compression ratios while maintaining a leak-free environment. Unlike traditional composite gaskets, the Cometic MLS design offers excellent rebound and corrosion resistance, ensuring your engine remains sealed under the most demanding conditions. Upgrade your Subaru's reliability today with premium components from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006 Saab 9-2X Aero
2004-2006 Subaru Baja Turbo
2004-2005 Subaru Forester XT
2006-2010 Subaru Forester XT Limited
2008 Subaru Forester Sports 2.5 XT
2009 Subaru Forester XT
2009-2013 Subaru Forester X Limited
2009-2013 Subaru Forester X Premium
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester XT Touring
2004-2014 Subaru Impreza WRX STI
2004-2014 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX STI Limited
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2011-2014 Subaru Impreza WRX STI Limited
2013-2014 Subaru Impreza Base
2013-2014 Subaru Impreza Limited
2004-2006 Subaru Legacy GT
2005 Subaru Legacy GT Limited
2006-2009 Subaru Legacy GT spec.B
2007-2009 Subaru Legacy GT Limited
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited

Product Details

Product Description
Part Numbers
Sizing & Fit

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Watch in action

Precision Sealing for High-Performance Subaru Engines

The Cometic 101mm .040" MLS Head Gasket is the professional choice for Subaru EJ255 and EJ257 engine builds. Engineered to handle the rigors of forced induction, this multi-layer steel gasket provides the durability required for high-horsepower applications. By utilizing advanced metallurgy and a specialized Viton coating, it creates a superior seal that resists the extreme heat and pressure fluctuations common in turbocharged Subaru engines.

Why Choose Cometic MLS Gaskets?

  • Robust Construction: Multiple layers of stainless steel provide maximum strength and structural integrity.
  • Viton Rubber Coating: Provides a superior seal on both sides, ensuring heat resistance up to 250°C.
  • Ideal Fitment: Specifically sized at 101mm to accommodate common overbore requirements for EJ25 platforms.
  • Thermal Management: Designed to handle the shearing forces between aluminum cylinder heads and engine blocks.

This .040" thickness gasket is perfect for builders looking to fine-tune their compression ratios while maintaining a leak-free environment. Unlike traditional composite gaskets, the Cometic MLS design offers excellent rebound and corrosion resistance, ensuring your engine remains sealed under the most demanding conditions. Upgrade your Subaru's reliability today with premium components from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006 Saab 9-2X Aero
2004-2006 Subaru Baja Turbo
2004-2005 Subaru Forester XT
2006-2010 Subaru Forester XT Limited
2008 Subaru Forester Sports 2.5 XT
2009 Subaru Forester XT
2009-2013 Subaru Forester X Limited
2009-2013 Subaru Forester X Premium
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester XT Touring
2004-2014 Subaru Impreza WRX STI
2004-2014 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX STI Limited
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2011-2014 Subaru Impreza WRX STI Limited
2013-2014 Subaru Impreza Base
2013-2014 Subaru Impreza Limited
2004-2006 Subaru Legacy GT
2005 Subaru Legacy GT Limited
2006-2009 Subaru Legacy GT spec.B
2007-2009 Subaru Legacy GT Limited
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited

Product Details

Product Description

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Watch in action

Precision Sealing for High-Performance Subaru Engines

The Cometic 101mm .040" MLS Head Gasket is the professional choice for Subaru EJ255 and EJ257 engine builds. Engineered to handle the rigors of forced induction, this multi-layer steel gasket provides the durability required for high-horsepower applications. By utilizing advanced metallurgy and a specialized Viton coating, it creates a superior seal that resists the extreme heat and pressure fluctuations common in turbocharged Subaru engines.

Why Choose Cometic MLS Gaskets?

  • Robust Construction: Multiple layers of stainless steel provide maximum strength and structural integrity.
  • Viton Rubber Coating: Provides a superior seal on both sides, ensuring heat resistance up to 250°C.
  • Ideal Fitment: Specifically sized at 101mm to accommodate common overbore requirements for EJ25 platforms.
  • Thermal Management: Designed to handle the shearing forces between aluminum cylinder heads and engine blocks.

This .040" thickness gasket is perfect for builders looking to fine-tune their compression ratios while maintaining a leak-free environment. Unlike traditional composite gaskets, the Cometic MLS design offers excellent rebound and corrosion resistance, ensuring your engine remains sealed under the most demanding conditions. Upgrade your Subaru's reliability today with premium components from GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006 Saab 9-2X Aero
2004-2006 Subaru Baja Turbo
2004-2005 Subaru Forester XT
2006-2010 Subaru Forester XT Limited
2008 Subaru Forester Sports 2.5 XT
2009 Subaru Forester XT
2009-2013 Subaru Forester X Limited
2009-2013 Subaru Forester X Premium
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester XT Touring
2004-2014 Subaru Impreza WRX STI
2004-2014 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX TR
2006-2007 Subaru Impreza WRX Limited
2007 Subaru Impreza WRX STI Limited
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2011-2014 Subaru Impreza WRX STI Limited
2013-2014 Subaru Impreza Base
2013-2014 Subaru Impreza Limited
2004-2006 Subaru Legacy GT
2005 Subaru Legacy GT Limited
2006-2009 Subaru Legacy GT spec.B
2007-2009 Subaru Legacy GT Limited
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited

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