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Kooks 3-Valve Exhaust Header Gaskets (05-10 GT)

Item 399807
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Market Price $41.99 You Save 13% ($5.26)
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$36.73 (pair)

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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Replaces Worn-Out Gaskets
      • Made from Dead Soft Aluminum
      • Provides a Leak-Free Seal
      • Blowout and Burnout Proof
      • Conveniently Reusable
      • Comes as a Pair
      • Made in the US
      • Easy and Direct Installation
      • Compatible with All 2005-2010 Ford Mustang GT Models


      Superior Leak-Free Performance. You cannot overstate the importance of a quality set of gaskets when you want to install a new set of headers or reinstall the trusted stock manifolds. That's why the Kooks 3-Valve Exhaust Header Gaskets are specifically designed to prevent exhaust leaks that can rob you of your precious power. These gaskets assure you not only maintain good performance, but also improve it in the case of a header replacement.

      Design and Functionality Combo. The Kooks 3-Valve Exhaust Header Gaskets are designed to function at peak levels even in the harshest conditions. This pair is blowout and burnout proof, ensuring they won't fail due to high temperatures—or even leak.

      Top-Quality Construction. Kooks understands that you value your GT and want it to achieve and maintain its full performance potential. For this reason, the Kooks 3-Valve Exhaust Header Gaskets is made from the highly reliable and resilient dead soft aluminum which gives it great heat resistance for sustained performance. They've even made in the USA.

      Installation. The Kooks 3-Valve Exhaust Header Gaskets allows for an easy and direct installation with minimal mechanical skills and simple hand tools. The process should take about 1 hour to complete.

      Warranty. Kooks assures that the Kooks 3-Valve Exhaust Header Gaskets are free from material and craftsmanship flaws and provide a 2-year limited warranty on the same.

      Application. The Kooks 2-Valve Exhaust Header Gaskets are compatible with all 2005-2010 Ford Mustang GT Models

      Fitment: 2005 2006 2007 2008 2009 2010 Details

      Kooks PY-8023-A-AL

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (7)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 7 customers

      • December 10, 2019

        5 2010 GT - Josh

        2 piece aluminum gasket

        They seam like they are good gaskets, install took maybe an hour due to some stubborn bolts in behind headers, old ones (same Brand) were on car for 6 years and started to leak.

        Helpful (0)
      • December 03, 2019

        4 2010 GT - JoelD

        No more leaky...

        The Kooks exhaust header gasket was a direct fit for my BBK headers. No issues. Everything is sealed back up and sounding great!!!

        Helpful (0)
      • November 22, 2019

        5 2005 GT - AlexN

        Kooks Header Gaskets

        Gaskets worked perfectly with my BBK Long Tube Headers! Very pleased with this gasket!

        Helpful (0)
      • December 28, 2018

        5 2007 GT - JacobC

        Long tubes

        Installed them with pipes long tubes because it’s the same shape, added a little silicone for the best seal and they work great!

        Helpful (3)
      • August 27, 2018

        5 2006 GT - LoganA

        Great quality

        Bought these for some headers I had purchased, they came quick and are built very well not flimsy like the last set I had gotten very good product, can’t go wrong with kooks.

        Helpful (6)
      • June 04, 2018

        5 2009 GT - MustangGT27

        No leaks so far

        I bought these instead of Ford Racing gaskets since they were out of stock. So far they have not let the headers leak which is awesome. Just take your time cleaning and make sure these fit good and you won't have any problems.

        Helpful (7)
      • January 29, 2018

        5 2006 GT - KyleS

        Bang for your buck

        Definitely better then stock more sturdy and fits like a dime

        Helpful (6)

      Questions & Answers (4 answers)

      4 Top Rated Questions

      Will this gasket work for the Sr Performance long tube headers on a 2006 mustang gt?

      Will these work with pypes long tube headers?

      • These will indeed work with Pypes, and really any headers that will fit up to your Mustang.

      Helpful (0)

      Will these work with bbk shorty headers

      • These will work with BBK shorty headers.

      Helpful (0)

      which side of the gasket will go toward the head

      • As you can see the gasket is not symmetrical. When held up to your headers, it will have a clear fitment as there is only one way to line it up.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Header Gaskets
      • Installation Hardware

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 08, 09
      • GT - 05, 06, 07, 08, 09, 10

          Related Mustang Categories