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Kooks 1-3/4 in. Long Tube Catted Headers (15-20 GT)

Item 404493
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Market Price $2,134.14 You Save 12% ($245.52)
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$1,888.62 (each)

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    Features, Video & Details

    • Long Tube Catted Headers
    • Precise OEM Quality
    • Outstanding Heavy Duty Construction
    • 1 3/4 Inch Mandrel Bent 304 Stainless Steel Tubing
    • Scavenger Spike Collectors for Maximum Air Flow Optimization
    • Limited Lifetime Warranty
    • Hard Degree of Difficulty Installation
    • Compatible with the 2015-2020 Ford Mustang GT

    Review & Installation Video

    Review & Install Video

    Long Tube Catted Headers by Kooks. The Kooks 1-3/4 Inch Long Tube Catted Headers deliver gains in horsepower and torque with outstanding heavy duty construction, a precise OEM quality fit, and freer manifolds for long-lasting performance on the off-road.

    Specialized Construction. This product delivers exceptional airflow with a unique construction comprising of 1 3/4 inch mandrel bent 304 stainless steel tubing that connects to scavenger spike collectors for maximum airflow optimization.

    Warranty. Kooks provides a limited lifetime warranty, which protects purchasers from any defects in materials and workmanship.

    Installation. It should take less than a day to install this product if you have moderate to expert level mechanical skills, with a hard degree of difficulty.

    Application. The Kooks 1-3/4 Inch Long Tube Catted Headers are compatible with the 2015-2020 Ford Mustang GT.

    Fitment: 2015 2016 2017 2018 2019 2020 Details

    MPN# 1151H221

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • Long Tube Catted Headers
    • Mounting Hardware
    Installation Info
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (5)

        5 Top Rated Questions

        Will these headers direct fit to AWE Touring Edition Cat-Back? I'm thinking I want to stay NA so 1-3/4" is probably best. I have CP-E Ice box CAI SCT GTX tuner.

        • These will be a direct fit with the factory cat-back, and any cat-back exhaust that is a direct fit with the factory headers due to the step-down flanges on these headers.

        Helpful (1)

        Can you drive after these are installed until you’re able to get the car tuned?

        • No, the vehicle cannot be driven with these installed without a custom tune.

        Helpful (0)

        Will I need extensions for my O2 sensors?.

        Are you required a tune for this product?

        • Yes, a tune is required when upgrading to long tube headers.

        Helpful (0)

        The setup I would like with these headers would be with the Ford Performance Power Pack 2 and the Ford Performance by Borla cat-back exhaust. Would the tune that comes with the Power Pack be sufficient with these headers?

        • Unfortunately, the tune would not be sufficient enough for these headers and you would need to get your Mustang retuned.

        Helpful (0)
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          Customer Reviews (2) Write a Review

          Overall Rating 5

          out of 5 stars

          Installation Time:Full Day

          • Loudness / Volume 4.5 4.5
          • Exhaust Note 4.5 4.5
          • Fit & Finish 5 5
          • Bang For Your Buck 3.5 3.5

          • 5/5

            February 11, 2019

            415 whp

            With just these, an xpipe, a very mild tune,no cat back yet, did 417 whp in TX summer heat (HPP Racing in Lewisville tx dyno)With a Lund tune, gt350 intake mani, bigger injectors, cat back (mbrp street 3”) and Pmas cai, car rips and roars. No dyno yet, but the butt dyno reads bout bout 30 to 50 more hp. Mine shop installed, also by HPP, hit them up, great shop. They are legit just google them


            Year: 2017 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Full Day

            July 25, 2018


            Sounds great, couldn't be happier with his product from AM. Would recommend to buy these if you are interested in headers.


            Year: 2017 Submodel: GT

            Helpful (7)