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Kooks Multi-Layer Steel Exhaust Header Gaskets (11-20 GT)

Item 399820
AmericanMuscle no longer carries the Kooks Multi-Layer Steel Exhaust Header Gaskets (11-20 GT). Please check out Mustang Exhaust Accessories for an updated selection.
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Features & Details

  • Distinct Squared Outlet Ports for Tight Sealing
  • Standard Quad Openings Support All Long Header Tubes
  • Premium, Multi-Layered Stainless Steel
  • Crafted to Provide Direct Bolt Installation of Headers
  • Kit Includes a Pair of Gaskets
  • Comes w/ Limited Lifetime Warranty as Quality Guarantee
  • Designed to Fit All 2011-2020 Ford Mustang GT Models

Unique Squared Ports Style. Designed to not only impress the eyes but also to offer better exhaust performance, Kooks Multi-Layer Steel Exhaust Header Gaskets allow you to secure your exhaust manifolds firmly. These gaskets are Dyno and Race-Tested to ensure you have a true high-speed performance exhaust upgrade for your 2011-2020 Mustang GT.

Safe Exhaust Dumping. Kooks manufactures the Kooks Multi-Layer Steel Exhaust Header Gaskets to do more than add a stylish look to your Mustang GT. This exhaust gasket allows you to fix a leak or prevent any leaks before they happen. Not only that, its squared ports hold the header tubes firmly for a good track clearance.

Superior Multi-Layered Steel. To ensure quality, Kooks utilizes high-grade stainless steel to craft the high-performance Exhaust Gaskets. The metal is multi-layered to produce sturdy custom exhaust upgrade gaskets. They not only offer safety but also have the toughness needed to withstand high exhaust temperatures.

Easy Installation. Multi-layered gaskets from Kooks are designed with pre-drilled bolt holes, in which fasteners are tightened for an easy mounting process. It is a simple process and only takes about 2 hours.

Limited Lifetime Warranty. Kooks believes their Multi-Layer Steel Exhaust Gaskets are built to the highest quality standards and provides a limited lifetime warranty to the original purchasing consumer of the product.

Application. These Kooks Multi-Layer Steel Exhaust Header Gaskets are engineered to fit all 2011-2020 Mustang GT models.

Fitment: Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (2) Steel Gaskets
  • Installation Hardware
Installation Info
Tech Specs
Will it fit my Mustang?

    Customer Photos

      Questions & Answers (2)

      2 Top Rated Questions

      Will these fit BBK Shorty Tuned Length headers?

      • These will work with those headers yes.

      Helpful (0)

      Will these work for 1 7/8" long tube headers?

      • Yes, these will support all long header tubes.

      Helpful (0)
      Post Your Question

        Customer Reviews (3) Write a Review

        Overall Rating 5

        out of 5 stars

        • 5/5

          May 02, 2019

          Header Gasket

          Shipped quickly. Great quality material. Metal gasket fits great with no leaks. Would recommend to get these.


          Year: 2014 Submodel: GT

          Helpful (0)

        • 5/5

          December 14, 2018


          VMP did the header install. Nothing said to me about any problems. As far as I'm concerned, VMP Performance is the only shop/tuner I will ever use. ALL of the personnel there at knowledgeable and always ready to answer questions.


          Year: 2017 Submodel: GT

          Helpful (4)

        • 5/5

          March 15, 2018

          Kooks is spot on

          Got pypes long tube headers upgraded to the kooks gaskets for a better fit


          Year: 2017 Submodel: GT

          Helpful (10)

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