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Kooks Green Catted Competition Exhaust System (15-20 GT350)

Item 398886
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Market Price $4,717.99 You Save 12% ($542.86)
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$4,175.13 (kit)

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      Product Information

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


      • Throaty Exhaust Sound
      • Bigger Pipes for Better Airflow and Performance
      • Full 3" Catted System
      • 1-3/4" x 1-7/8" x 3" Heavy-duty, Crack-Resistant Header
      • 3” X-Pipe with Cat
      • 3” Muffler Section
      • Multi-Mode Exhaust Compatible
      • Bolt-On Replacement, No Cuts or Welding
      • Made in America
      • Sold as a Kit
      • Lifetime Limited Warranty
      • Industry-Leading 49-State “Green” Certification
      • Designed for 2015-2020 GT350/GT350R Mustangs


      Unlock Your Pony’s Potential. The Kooks Green Catted Competition Exhaust System is engineered to give your GT350 (or GT350R) a delightfully throaty exhaust note with power to match. The system uses quality, three-inch stainless-steel tubing throughout, paired with high-flow catalytic converters, offering industry-leading power gains.

      Complete 3" Competition-Ready Exhaust. Kooks designed the Green Catted Competition Exhaust System to open up the exhaust so your Mustang can breathe. The system starts with crack-resistant, heavy-duty 1-3/4" x 1-7/8" headers, moving through a 304SS X-pipe toward a cat-back with adjustable mufflers designed to rest in the stock spots.

      Retains Multi-Mode Exhaust Function. If you’re a fan of the GT350’s multi-mode exhaust feature, which enables you to flip from normal to sport mode, rest assured Kooks has engineered this exhaust system to work with the OEM butterfly valves. This means you can still flip the switch and get a power boost from less restricted exhaust flow on the fly.

      Bolt-On Installation. The Kooks Green Competition System requires no welding or cutting for installation. The product bolts on in place of your factory exhaust without modification. While no special tools are required, the job will take even an experienced mechanic most of a day.

      Lifetime Warranty. The Green Catted Competition Exhaust System carries a Kooks limited lifetime warranty.

      Application. The Kooks Green Catted Competition Exhaust System is engineered for Mustang GT350 and GT350R models manufactured between 2015-2020.

      Fitment: 2015 2016 2017 2018 2019 2020 Details

      Kooks 1154F330

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (1)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 1 customers

      Installation Time: Full Day

      • April 18, 2019

        5 2018 EcoBoost - Philip Installation Time: Full Day


        Love this product. Highly recommended. Sounds amazing

        Helpful (3)

      Questions & Answers (3 answers)

      3 Top Rated Questions

      Are any performance gains expected from using this product?

      • Yes, performance gains are to be expected after installing this exhaust system.

      Helpful (0)

      Will i require a tune after installing these headers and exhaust?

      • Yes, a tune will be required after installing this full exhaust kit.

      Helpful (0)

      Is it CA street legal? Will it void the car warranty?

      • The Kooks Green Catted Competition Exhaust System will not pass smog in CA. This should not void your warranty, but you should verify any warranty concerns with the Ford dealer that services your warranty.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Headers
      • (2) Catalytic Convertors
      • (1) X-Pipe
      • (2) Pipes
      • (2) Over-Axle Pipes
      • (2) Muffler Assemblies
      • (2) Gaskets
      • (2) O2 Extensions
      • (8) Clamps

      Tech Specs

      Will It Fit My Mustang

      • GT350 - 15, 16, 17, 18, 19, 20
      • GT350R - 15, 16, 17, 18, 19, 20

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