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Kooks 2-Inch Long Tube Headers; Catted (15-20 GT)

Item 404499
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Market Price $2,235.99 You Save 12% ($258.04)
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$1,977.95 (each)

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      Product Information

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


      • Long Tube Catted Headers
      • Deliver Horsepower and Torque Gains
      • Long Tube Header Design
      • Integrated Venturi Style Collector with Scavenging Spikes for Improved Exhaust Flow
      • Constructed Using 304 Stainless Steel
      • Precise OEM Fit
      • Leak Free Ball and Socket Composition
      • Limited Lifetime Warranty
      • Hard Degree of Difficulty Installation
      • Compatible with the 2015-2020 Ford Mustang GT


      Incredible Exhaust Unit. The Kooks 2 Inch Long Tube Catted Headers deliver an optimized combination of horsepower and torque gains and improved exhaust sound over stock with its long tube header design. They use an integrated venturi style collector with scavenging spikes for enhanced exhaust flow using freer manifolds.

      304 Stainless Steel. These long tube catted headers are constructed using 304 stainless steel tubing with a corrosion resistant finish for the durability. They provide a precise OEM fit with a leak-free ball and socket composition.

      Warranty. This product is protected by a limited lifetime warranty, which protects against defects in materials and workmanship from the manufacturer. The manufacturer accepts no responsibility for lack of maintenance or improper use.

      Installation. If you have moderate expert-level mechanical skills, it will take you upwards of a day to complete this installation using the provided mounting hardware.

      Application. The Kooks 2 Inch Long Tube Catted Headers are compatible with the 2015-2020 Ford Mustang GT.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 1151H621

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (5)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 5 customers

      Installation Time: Weekend

      Installation Cost: $500-$1000

      • February 06, 2020

        5 2016 GT - DakotaCald Installation Time: Full Day

        Helpful (0)
      • January 14, 2020

        5 2018 GT - Justa5point0 Installation Time: Shop Install Installation Cost: $500-$1000


        My 18 Mustang literally woke with these headers. I would highly recommend kooks over any other brand.

        Helpful (1)
      • June 15, 2019

        5 2019 GT - RandyG Installation Time: Shop Install

        Amazing sound

        Had these installed and the return is amazing. Really woke up my exhaust. You will need a tune for these or any other headers installed on an 18 or 19 gt.

        Helpful (1)
      • February 23, 2019

        5 2019 GT - Ted Installation Time: Weekend


        It has been great. Amazing sound. Great flow. Running a d1x procharger through these pipes

        Helpful (3)
      • August 13, 2018

        5 2017 GT - ChrisO Installation Time: Shop Install Installation Cost: $500-$1000


        Just got these headers to go along with my corsa xtreme catback and i couldn't be happier, very intimidating, no check engine light and i can definitely feel the small hp gains. Thanks AM!

        Helpful (13)

      Questions & Answers (12 answers)

      5 Top Rated Questions

      Will these fit a Borla S-Type exhaust and x pipe designed to fit with the stock tubes?

      • These will work with that set up yes.

      Helpful (3)

      Will these fit with Borla ATAK catback?

      • Yes, they will work with the Borla ATAK cat-back exhaust.

      Helpful (2)

      How do I get a tune for longtube headers could y’all help me on what I need to buy

      • You simply just need to order any of our custom tunes and request they tune for those headers. I can offer our tuning experts' customer service line below if need be: 1-888-226-9764Mon-Sat 9:00 AM - 7:00 PM EST

      Helpful (1)

      Will these fit Corsa Xtreme 3 in. Cat-Back Exhaust?

      • Yes, these will work with that exhaust.

      Helpful (1)

      Will this work with the 2018 Mustang GT "MBRP Pro Series Cat-Back Exhaust; Race Version"

      Post Your Question
      7 More Questions
      Can this be paired with the pypes x-bomb cat back? 1 answer
      Will these work with Mbrp race cat back and will the require a tune or reprogram? Also will I still pass inspection with these ? 0 answer
      Will this fit without any modifications with a Roush Cut and Clamp H-Pipe (Item 404879)? 0 answer
      will these fit on a 2017 mustang gt that has been lowered 2in? 1 answer
      Do you need an O2 extension on these ? 0 answer
      Are these cats, fake cats? 1 answer
      Will these catted headers enable me to pass Maryland Emissions testing? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Long Tube Catted Headers
      • Mounting Hardware

      Will It Fit My Mustang

      • Bullitt - 19, 20
      • GT - 15, 16, 17, 18, 19, 20