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

Item 398886
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Market Price $6,986.97 You Save 10% ($698.70)
Our Price

$6,288.27 (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.



      Kooks 1154F330

      CA Residents: WARNING: Cancer and Reproductive Harm -

      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


      Customer Reviews (1)

        Brand Image

        Reviews of Kooks Exhaust products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

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

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