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Stainless Works 3-Inch Retro Chambered Cat-Back Exhaust with X-Pipe (15-17 GT Fastback w/ Long Tube Headers)

Item 390324
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Market Price $1,437.16 You Save 12% ($165.34)
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$1,271.82 (kit)

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      Product Information

      Features, Description, Reviews, Specs & Installation


      • Aggressive Muscle Car Exhaust Note
      • Retro Styled 2.5" Core Chambered Mufflers
      • 3" Diameter 304 Stainless Steel Tubing
      • Mirror Polished 304 Stainless Steel Tips
      • Includes X-Pipe and Two Chambered Resonator Tips
      • 22 lbs. Lighter Than the Stock Cat-Back System
      • Requires Stainless Works Long Tube Headers Part# 384844 or 384845
      • Designed and Manufactured in the USA
      • Fits 2015-2017 GT Fastback Mustangs with Stainless Works Long Tube Headers


      Aggressive Exhaust Note. Add a classic 60's muscle car style exhaust note to your coyote powered S550 GT Fastback with a Stainless Works 3" Retro Chambered Cat-Back Exhaust System. This Cat-Back not only sounds aggressive, but it also improves your Mustangs exhaust flow with the included X-Pipe for an increase in horsepower, torque and overall performance.

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

      Stainless Steel Construction. Constructed in the USA from mandrel bent 3" diameter 304 stainless steel tubing for strength and superior corrosion resistance, this Stainless Works Mustang Cat-Back Exhaust System features two round retro chambered 2.5" core mufflers that end with mirror polished 304 stainless steel slant cut resonator exhaust tips.

      Lightweight. This Stainless Works Cat-Back Exhaust System is 22 lbs. lighter than the factory Ford catback system, making it perfect for track and drag racers looking to shed unwanted weight in the pursuit of quicker times.

      Application. This Stainless Works Retro Chambered Cat-Back with X-Pipe is specifically designed to fit the 2015-2017 GT Fastback Mustangs equipped with the 32-valve DOHC coyote 5.0L V8 engine. Requires Stainless Works long tube headers part# 384844 or 384845. Not compatible with convertibles.

      Fitment: 2015 2016 2017 Details

      Stainless Works M15CB3X

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Right Muffler Assembly
      • (1) Left Muffler Assembly
      • (1) X-Pipe Assembly
      • (1) Right Intermediate Pipe
      • (1) Left Intermediate Pipe

      Tech Specs

      Cat-Back Exhaust Specifications
      Piping Material:304 Stainless Steel Tip Material :Mirror Polished 304 Stainless Steel
      Piping Size:3"Tip Size:4"
      Muffler Type:Retro Chambered 2.5" CoreFitment:2015-2017 GT Fastback w/ Long Tube Headers

      Customer Reviews (5)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 5 customers

      Installation Time: Afternoon

      • December 24, 2019

        5 2016 GT - Shawn Installation Time: Afternoon

        Stainless works catback

        I had a Flowmaster Outlaw the last couple years. The stainless works is much higher quality and the sound is amazing. It sounds nothing like it does in videos on YouTube. It’s much more refined with no rasp or drone.

        Helpful (0)
      • April 13, 2018

        5 2017 GT - JohnC Installation Time: Less than 1 Hour

        Wake up your Coyote!!

        The comparison videos are good but the sound difference is substantial. Suddenly my GT sounds like a muscle car should. Super easy to install.

        Helpful (9)
      • June 13, 2017

        5 2016 GT - Aaron Installation Time: Afternoon

        Sounds Perfect

        Love this Exhuast. I love the attention and gets and I can keep it low volume on highway.

        Helpful (10)
      • July 21, 2016

        5 2015 GT - Bayrat

        SW Headers

        Purchased this system including the long tube headers and am 100 satisfied. I listened to many systems but you never really know until you sitting in that driver seat. First I like a little rasp in the sound but enjoy the pure muscle sound. These hit the mark perfectly. Best sounding system I have heard. Sure that's coming from me, but when your at the shop with all the other mustang owners and they say that's what I should have put on mine that tells it all. These will not disappointment.

        Helpful (10)
      • June 27, 2016

        5 2016 GT - GARBAGEMANDAN Installation Time: Less than 1 Hour

        Stainless works best sounding exhaust

        This exhaust sounds great had the flowmaster outlaw catback and it sounded terrible I should of just went with this from the beginning very hapoy

        Helpful (12)

      Questions & Answers (0 answers)

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      Will It Fit My Mustang

      • GT - 15, 16, 17

      Not compatible with Convertibles due to different bracing; This Cat-Back is for 15-17 GTs & requires Stainless Works LTHs part# 384844 or 384845.

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