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Kooks Cat-Back Exhaust with X-Pipe and Black Tips (15-17 GT w/ Kooks Headers)

Item 386642
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      Product Information

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


      • Aggressive Muscle Car Exhaust Note
      • Polished Oval Race Mufflers
      • Full 3" Diameter Stainless Steel Tubing
      • 4" Black Stainless Steel Slash Cut Tips
      • Includes Stainless Steel X-Pipe
      • Direct Fit Replacement Upgrade
      • Fits 2015-2017 GT Fastback and Convertible Mustangs w/ Kooks Long Tube Headers


      Aggressive Exhaust Note. Upgrade the quiet stock exhaust system on your 2015-2017 S550 GT Fastback with a Kooks Cat-Back Exhaust System with X-Pipe. Designed for use with Kooks Long Tube Headers, this full 3" catback system will not only sound great, but will also improve exhaust flow with the included X-Pipe for an increase in horsepower and torque.

      Race Car Growl. The included X-Pipe not only helps increase power, but it also adds a crisp raspy, race car growl to the sound of your exhaust with its modern "X" crossover pipe design.

      Stainless Steel Construction. Constructed from mandrel bent 3" diameter 304 stainless steel tubing for strength and superior corrosion resistance, this Kooks Cat-Back Exhaust System features (2) polished oval race mufflers that end with 4" stealthy black 304 stainless steel slash cut exhaust tips.

      Lightweight. Weighing in at approximately 60 lbs, the Kooks Cat-Back Exhaust with X-Pipe is a great choice for track and drag racers looking to shed unwanted weight in the pursuit of quicker times.

      Direct Fit Upgrade. The Kooks Cat-Back Exhaust with X-Pipe includes all the hangers and clamps necessary to bolt straight up to Kooks Long Tube Headers without any modifications required, making it a direct fit, bolt-on replacement upgrade.

      Application. This Kooks 3" Cat-Back Exhaust with X-Pipe and Black Tips is specifically designed to fit the 2015-2017 GT Fastback and Convertible Mustang with a Kooks Long Tube Header and Connection Pipe System installed. Not compatible with convertibles.

      Technical Note. Not legal for use on pollution controlled motor vehicles; intended for off road use only.

      Fitment: 2015 2016 2017 Details

      Kooks 11515111

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Mid-pipe
      • (2) Connection Pipes
      • (2) Over-Axle Pipes
      • (2) Oval Race Mufflers
      • (2) Slash Cut Tips
      • (10) Clamps

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:Stainless Steel Tip Material :Black 304 Stainless Steel
      Piping Size:3"Tip Size:4"
      Muffler Type:Race MufflerFitment:2015-2017 GT Fastback w/ Kooks Long Tube Headers

      Customer Reviews (5)

        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

          • GT - 15, 16, 17

          Not compatible with Convertibles due to different bracing; Not compatible with stock headers

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