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Cosworth High Performance Head Gasket 1.1mm (Part Number: )
Cosworth High Performance Head Gasket 1.1mm (Part Number: )
Cosworth High Performance Head Gasket 1.1mm (Part Number: )
Cosworth High Performance Head Gasket 1.1mm (Part Number: )
Cosworth High Performance Head Gasket 1.1mm
Subaru EJ25 Turbo Models (inc. 2004-2007 STI / 2006-2014 WRX)

Features & Product Details

Cosworth High-Performance Multi-layer steel head gaskets are designed to seal in power under the most demanding conditions.

Features:
  • Individual die cut layers of stainless steel with superior consistency compared to laser cut gaskets.
  • Pre-coated stainless steel with a 0.25-micron layer of nitrile rubber ensures consistent distribution of coating with no high or low areas.
  • Manufacturing dimensional tolerance of 0.002".
  • Die cut manufacturing process ensures smooth edges, unlike laser cut gaskets.
  • Cosworth gaskets feature a "stopper" sealing layer for additional torque around each cylinder. The width of sealing area is specific for each application thereby providing ultimate sealing properties.

  • Specs:
  • Bore: 101mm
  • Thickness: 1.1mm

  • PRICE IS PER GASKET! TWO GASKETS ARE REQUIRED FOR A COMPLETE SUBARU MOTOR.

    Specifications

    Brand: Cosworth
    Bore Size: 101mm
    QTY: 1
    Thickness: 1.1mm
    Mfgr. Warranty: No Warranty
    Condition: New Product
    Return Policy:

    RallySport Guarantee - 30 Days


    Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

    RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

    The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.
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    2009 WRX 265 head gasket issue 6 years ago
    2009 T-Rex
    A must if you are running a higher boost than stock. The 2009 WRX is known for these head gasket issues. Let a pro do the head job.
      
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    QUESTIONS & ANSWERS

    • Q: Surface finish   Fr9ford2 years ago

      What is the proper cylinder head and block sealing surface RA value required for these head gaskets?
      • 0 of 0 people found the following answer helpful

        A:  Thank you for the question. The nitrite rubber helps our gaskets seal better compared to conventional non-coated MLS gaskets, however we suggest to NOT exceed 50 microinches RA. The lower (smoother) , the better.

        Kirill C. @ Cosworth 2 years ago  
          
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    • Q: Better than thinner gasket?  PLN 334 years ago

      Would this thicker gasket seal better than the other thinner cosworth gasket? Since other after market gaskets like grimmspeed's exhaust gaskets are thicker than OEM (7 layers as opposed to 3).
      • 0 of 0 people found the following answer helpful

        A:  Thinner or thicker head gaskets will not have a difference in layers, it is the thickness of the metal gasket to provide clearance to the pistons from the valves or to alter compression slightly depending on the setup needed.

        Stevens Henager @ RallySport Direct 4 years ago  
          
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    • Q: Advantages?  Andrew Jarvie4 years ago

      What is the benefit of going with a thicker HG?
      • 0 of 0 people found the following answer helpful

        A:  A thicker head gasket can decrease compression on a standard head and block. If either of these have been machined down you can make up for the loss of material with a thicker gasket as well to keep a close to stock compression.

        Nick S. @ RallySport Direct 4 years ago  
          
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    • Q: Size  04sti8085 years ago

      Will this gasket fit a stock set of heads? Will I need a different gasket if my heads are going to be machined?? Thanks!
      • 0 of 0 people found the following answer helpful

        A:  This will fit stock heads with no issues on vehicles that are listed in the confirmed application listing.

        Kirill C. @ RallySport Direct 5 years ago  
          
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    This Part Fits

    Saab 9-2X
    Aero
    2006 Saab 9-2X Aero
    Subaru Impreza
    WRX
    2006 Subaru Impreza WRX
    2007 Subaru Impreza WRX
    WRX Hatchback
    2008 Subaru Impreza WRX Hatchback
    2009 Subaru Impreza WRX Hatchback
    2010 Subaru Impreza WRX Hatchback
    2011 Subaru Impreza WRX Hatchback
    2012 Subaru Impreza WRX Hatchback
    2013 Subaru Impreza WRX Hatchback
    2014 Subaru Impreza WRX Hatchback
    WRX Limited
    2006 Subaru Impreza WRX Limited
    2007 Subaru Impreza WRX Limited
    WRX Limited Hatchback
    2010 Subaru Impreza WRX Limited Hatchback
    2011 Subaru Impreza WRX Limited Hatchback
    2012 Subaru Impreza WRX Limited Hatchback
    2013 Subaru Impreza WRX Limited Hatchback
    2014 Subaru Impreza WRX Limited Hatchback
    WRX Limited Sedan
    2010 Subaru Impreza WRX Limited Sedan
    2011 Subaru Impreza WRX Limited Sedan
    2012 Subaru Impreza WRX Limited Sedan
    2013 Subaru Impreza WRX Limited Sedan
    2014 Subaru Impreza WRX Limited Sedan
    WRX Premium Hatchback
    2010 Subaru Impreza WRX Premium Hatchback
    2011 Subaru Impreza WRX Premium Hatchback
    2012 Subaru Impreza WRX Premium Hatchback
    2013 Subaru Impreza WRX Premium Hatchback
    2014 Subaru Impreza WRX Premium Hatchback
    WRX Premium Sedan
    2010 Subaru Impreza WRX Premium Sedan
    2011 Subaru Impreza WRX Premium Sedan
    2012 Subaru Impreza WRX Premium Sedan
    2013 Subaru Impreza WRX Premium Sedan
    2014 Subaru Impreza WRX Premium Sedan
    WRX STI
    2004 Subaru Impreza WRX STI
    2005 Subaru Impreza WRX STI
    2006 Subaru Impreza WRX STI
    2007 Subaru Impreza WRX STI
    WRX STI Limited
    2007 Subaru Impreza WRX STI Limited
    WRX Sedan
    2008 Subaru Impreza WRX Sedan
    2009 Subaru Impreza WRX Sedan
    2010 Subaru Impreza WRX Sedan
    2011 Subaru Impreza WRX Sedan
    2012 Subaru Impreza WRX Sedan
    2013 Subaru Impreza WRX Sedan
    2014 Subaru Impreza WRX Sedan
    WRX TR
    2006 Subaru Impreza WRX TR
    2007 Subaru Impreza WRX TR