Turbo Blankets Now Available for Subaru and Ford Models

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Turbo blankets.  They look cool, but are they actually beneficial?  Yes.  Yes, they are.  Benefits can be found on both sides of the blanket.  Obviously it prevents the turbo from heat soaking its neighbors in the engine bay, but the real magic happens on the underside.  With a turbo blanket installed, the turbo RPM acceleration improves.  This leads to faster turbo spool and getting to peak torque more quickly.  But how does it work?

Any internal combustion engine is going to produce a ton of heat.  In a naturally aspirated performance engine, we typically see intricately designed header runners that help remove that heat from the system as quickly as possible.  This is ideal since intense heat will hinder performance.  But, when a turbocharger is introduced, it causes us to reconsider how these exhaust gasses are managed.  Here’s a quick rundown on how turbochargers work.  Now that we’ve got that down, let’s get to the nitty-gritty of adding a turbo blanket to our turbocharger(s).

We know our turbocharger is driven directly by exhaust gasses.  The energy that exits each exhaust valve funnels into the turbo manifold and into the turbine housing of the turbo.  This is where the turbo blanket comes into play.  By surrounding the turbine housing with an insulator, we prevent the dissipation of that useful exhaust energy.  Keeping this heat in reduces air density which increases the velocity of the spent exhaust gasses directed through the turbine and forces the shaft RPM to increase at a greater rate.  This leads to faster spool and earlier boost potential.  Since more heat is contained in the hot side of the turbo, it also means less ambient heat for your other engine components.

Check out this study by the University of Texas’ Engines Research Program where they did thorough testing with a PTP Turbo Blanket on a Cummins Turbo Diesel.

The COBB Turbo Blanket is specifically designed for a perfect fit for several applications.


Subaru EJ Turbo Blanket

  • 2002 – 2014 WRX
  • 2004 – 2019 STI
  • 2004 – 2013 Forester XT
  • 2005 – 2009 Legacy GT
  • 2005 – 2009 Outback XT

Ford Turbo Blanket 2.0L EcoBoost

  • 2013 – 2018 Focus ST

Ford Turbo Blanket 2.3L EcoBoost

  • 2015 – 2019 Mustang EcoBoost
  • 2016 – 2018 Focus RS





Joe Pepe on March 26, 2019 says:

Is this out for the ’19 WRX yet? Thanks.

    Kyle on March 27, 2019 says:

    Hi Joe,

    Not yet but stay tuned… We’re looking to have something out for that application soon.


Dean Lam on March 27, 2019 says:

Does the EJ blanket fit aftermarket turbos? I current gave a Dom 1.5xtr

    Kyle on March 27, 2019 says:

    Hi Dean,

    It is designed for a stock sized turbo. It hasn’t been test fit on anything else, so while I can’t say for sure, if your turbine housing is a similar size to the stock unit, it should fit just fine.


Matthew Burgard on March 31, 2019 says:

any chance for one for the fiesta st soon?

    Adam Hill
    Adam Hill on April 1, 2019 says:

    Hi Matthew,

    There is potential for adding additional vehicle options but we’re still looking into that. So not sure on the what or when yet.