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Kooks 1-3/4 in. Stepped Stainless Steel Long Tube Headers (15-20 GT350)

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Market Price $1,628.79 You Save 12% ($187.38)
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$1,441.41 (each)

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  • Item 398882

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    Features & Details

    • Accelerated Exhaust Flow for Increased HP and Torque
    • Made of Premium, Aerospace-Grade T304 Stainless Steel
    • 1-3/4" Tubular Construction – Mandrel-Bent
    • Coated with Chrome Finish for Ultimate Corrosion Resistance
    • Direct Fit Replacement Custom Accessory
    • Recommended for Use with Kooks Y-Pipe or Kooks H-Pipe for Top-Notch Performance
    • Not CARB Compliant – Illegal for Sale or Use in Licensed Vehicles in California
    • Limited Lifetime Warranty
    • Fits All Ford Mustang GT350 Models Built Between 2015 – 2020
    Enhanced Exhaust Note. The principle rule with exhaust systems is; with an accelerated flow, the more the sound. In simple terms, the Kooks 1-3/4 in. Stepped Stainless Steel Long Tube Headers give your supercharged Mustang GT350 a more aggressive roar when the baffles open up. Once you have your foot on the pedal, you accelerate with more throttle.

    Enhanced Horsepower and Torque. Kooks Long Tube Headers feature a high-performance venturi exhaust collection tube that increases the scavenging rate and reduces exhaust turbulence for a perfect flow. This bolsters power and throttle, thereby increasing your Ford GT350’s acceleration.

    Superior Construction. Kooks Long Tube Headers are engineered using premium 1-3/4" Mandrel-Bent 304-Grade Stainless Steel tubes that provide the strength and endurance needed for high exhaust temperatures. In fact, they are robust enough to withstand up to 1500 degrees. Atop that, its chrome finish protects it from corrosion.

    Easy, Bolt-On Mounting. Kooks designs its 304 Stepped Stainless Steel Long Tube Headers to be a direct replacement for the stock manifolds. They come with predrilled bolt holes and are easily installable using simple tools. For ultimate performance, Long Tube Headers must work with Y-Pipe or H-Pipe.

    Warranty. Kooks guarantees the original product consumer with a Limited Lifetime Warranty.

    Application. Kooks 1-3/4-inch Stepped Stainless Steel Long Tube Headers are crafted to fit all Mustang GT350 models, manufactured between 2015 and 2020.

    Fitment: 2015 2016 2017 2018 2019 2020 Details

    MPN# 11542300

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) 1-3/4" Stainless Steel Long Tube Headers
    • Hardware
    Installation Info
    Tech Specs
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (5)

        5 Top Rated Questions

        Is this sold as a pair ??

        • Yes they are sold in sets, one driver side header and one passenger side header.

        Helpful (0)

        I currently have the Ford Performance Active Exhaust (Item 394115 MPN# M-5200-MSS) on my 2017 Shelby. Will this product line up with the Ford Performance Exhaust? If so, will this set-up require a tune?

        • The Kooks 1-3/4 in. Stepped Stainless Steel Long Tube Headers will require the use of the Kooks X pipe, 398883, 398884, or 398885. Minor modification to the Ford Performance Cat-Back may be required, as well as removing the X pipe from the Ford Performance Cat-Back.

        Helpful (0)

        I currently have the Ford Performance Active Exhaust (Item 394115 MPN# M-5200-MSS) on my 2017 Shelby. Will this product line up with the Ford Performance Exhaust?

        • The Kooks 1-3/4 in. Stepped Stainless Steel Long Tube Headers will require the use of the Kooks X pipe, 398883, 398884, or 398885. Minor modification to the Ford Performance Cat-Back may be required, as well as removing the X pipe from the Ford Performance Cat-Back.

        Helpful (0)

        Are these Stepped 1-3/4" X 1-7/8" Primaries? And will they fit up to the Corsa Extreme 3 in. cat back exhaust ?

        • These are in fact stepped 1 3/4" x 1 7/8" x 3" primaries. They require the Kooks x-pipe item number 398883 for an off-road option, or item number 398885 for a catted option.

        Helpful (0)

        I am thinking about throwing the GT350 cylinder heads onto my 2014 Mustang GT, it says I have to use GT350 long tube headers for that setup. Will these fit my S197 (5.0) with the 5.2 Voodoo Cylinder Heads?

        • The Kooks 1-3/4 in. Stepped Stainless Steel Long Tube Headers will work with your setup, however you will most likely need to modify a mid pipe to work.

        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 5 5
          • Exhaust Note 5 5
          • Fit & Finish 5 5
          • Bang For Your Buck 4.5 4.5



          • 5/5

            Installation Time: Weekend

            August 07, 2018

            Huges performance gain

            This is a challenge to do but its worth the performance gain. The headers are extremely high quality and are built to last. I highly recommend this purchase.

            RichardK

            Year: 2016 Submodel: GT350

            Helpful (10)

          • 5/5

            Installation Time: Afternoon

            May 13, 2018

            Kooks headers

            Installed and made a world of difference. Highly recommended! Sounds amazing in conjunction with the other mods added by American Muscle.

            TimR

            Year: 2017 Submodel: GT350

            Helpful (12)