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Kooks Cat-Back Exhaust w/ X-Pipe (15-17 GT w/ Kooks Headers)

Item 386641
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Market Price $1,742.20 You Save 12% ($200.42)
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    Features & Details

    • Aggressive Muscle Car Exhaust Note
    • Polished Oval Race Mufflers
    • Full 3" Diameter Stainless Steel Tubing
    • 4" Polished 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 that quiet exhaust system on your coyote powered 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" highly polished 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 Cat-Back Exhaust with X-Pipe and Polished 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

    MPN# 11515101

    CA Residents: WARNING: Cancer and Reproductive Harm -

    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
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material:Stainless Steel Tip Material :Polished 304 Stainless Steel
    Piping Size:3"Tip Size:4"
    Muffler Type:Race MufflerFitment:2015-2017 GT Fastback w/ Kooks Long Tube Headers
    Will it fit my Mustang?

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          Customer Reviews (3) Write a Review

          Overall Rating 3.7

          out of 5 stars

          Installation Time:Afternoon

          • Loudness / Volume 4.666667 4.7
          • Exhaust Note 3.666667 3.7
          • Fit & Finish 4.333333 4.3
          • Bang For Your Buck 3.333333 3.3

          • 1/5

            Installation Time: Shop Install

            October 19, 2017

            Review from Kooks Cat-Back Exhaust w/ X-Pipe & Black Tips (15-17 GT w/ Kooks Headers)

            Big Letdown

            I purchased Kooks Green Catted headers and matching Cat Back Exhaust, problem is, they do not match and do not connect, which was confirmed by Kooks head office. I had to spend additional money to make the system work and also to improve the system. The rear mufflers are poor in performance and make a very disappointing extremely raspy noise, that is far too loud to drive on the street and very hard to live with. To cap it all off, given the very high price, Kooks service and responsiveness was rubbish. Very very poor and will never buy a Kooks product again, as a result. Kooks are not worth the money and their customer service is one of the worst I have ever experienced, better off paying half the money and getting something superior across the board.


            Year: 2017 Submodel: GT

            Helpful (11)

          • 5/5

            Installation Time: Less than 1 Hour

            September 06, 2017

            Review from Kooks Cat-Back Exhaust w/ X-Pipe & Black Tips (15-17 GT w/ Kooks Headers)


            Alittle quite but has an amazing sound it will make your mustang unique.


            Year: 2017 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Less than 1 Hour

            May 19, 2016

            Warns the competition

            Great sound. Flows incredible But NOT for those trying to roll in stealth mode Combined with the full length tubes, the power and rev comes alive!


            Year: 2015 Submodel: GT

            Helpful (10)

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