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

Item 404500
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Market Price $2,723.99 You Save 12% ($313.67)
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      Product Information

      Features, Description, Q&A, Specs & Installation


      • Long Tube Catted Headers
      • Uses EPA Friendly Greencat Catalytic Converters
      • Three-Inch Scavenger-Spiked Collector to Convert Her Vehicles Toxic
      • Exhaust Fume
      • Ball and Socket Design
      • Precise OEM Quality Tightness
      • Made in the U.S.A.
      • Limited Lifetime Warranty
      • Hard Degree of Difficulty Installation
      • Compatible with the 2015-2020 Ford Mustang GT


      Long Tube Catted Headers by Kooks. Optimize your Mustang GT's exhaust flow for small horsepower and torque gains with the top-grade Kooks 2 Inch Long Tube Green Catted Headers. These long tube headers use EPA-friendly GreenCat catalytic converters and a 3-inch scavenger-spiked collector to convert your Mustang’s toxic exhaust fumes into less toxic ones.

      OEM Quality. Exhaust leakage is effectively prevented with a ball and socket design for precise OEM-quality tightness. This product is proudly made in the U.S.A.

      Warranty. Kooks guarantees your product is free from defects in materials and workmanship with a limited lifetime warranty. Damage as a result of abuse or neglect will not be covered.

      Installation. You should expect to take roughly an entire day installing this product, with a hard level of difficulty if you have light to moderate mechanical skills. Mounting hardware is included.

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

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      MPN# 1151H631

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Questions & Answers (10 answers)

      5 Top Rated Questions

      will I lost some torque in low RPM if I change this header with the stock header(compare to the stoke setting)? cause I knew smaller tube like 1 3/4 in. may increase more torque, but it also produce more noise which I don't like. I prefer more nature feeling after modification: a little bite more torque at lower RPM, maybe more horsepower at high RPM, so, will this header suit me?

      • If you do not have a boosted application you will probably lose torque on the low end. Generally the 2 inch piping ends up being too large for a naturally aspirated application, however ultimately I would suggest speaking with your tuner as the answer depends on how they will tune the application.

      Helpful (2)

      What's the advantage of 2 inch over the other sizes?

      Will these fit the Ford Performance by Borla extreme cat-back exhaust (Item 405826)?

      • These headers will work with that exhaust kit.

      Helpful (0)

      switch size will be proper to my car(I want keep NA)? 1 7/8 in. or 1 3/4 in.?

      • Both diameter size tubing would be a good fit for your N/A setup. You might see a decrease in low-end torque with a larger diameter header but the difference is very minimal.

      Helpful (0)

      whitch tuner will you suggest if I want to use this header?

      • A Bama tune would be perfect with these headers! Feel free to contact our American Muscle tuning experts for further questions to make sure you will get the best tunes for your application.

      Helpful (0)
      Post Your Question
      5 More Questions
      Will this setup work with the factory cat back system? 1 answer
      Csn i use this header without ECU re-turn? 1 answer
      Can I use these headers with a corsa extreme cat back exhaust 1 answer
      Could I connect these headers to a Borla ATAK exhaust system on a 2019 GT Mustang? 1 answer
      Will these bolt up to the Magnaflow competition cat back system or will I need to find an adapter for them? 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