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Stainless Works 3 in. Retro Chambered Cat-Back Exhaust w/ X-Pipe (15-17 GT Fastback)

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

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  • Item 390325

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    Features, Video & Details

    • Aggressive Muscle Car Exhaust Note
    • Retro Styled 2.5" Core Chambered Mufflers
    • 3" Diameter 304 Stainless Steel Tubing (Steps Up from 2.5")
    • Mirror Polished 304 Stainless Steel Tips
    • Includes X-Pipe and Two Chambered Resonator Tips
    • Direct Fit Replacement Upgrade
    • 22 lbs. Lighter Than the Stock Cat-Back System
    • Designed and Manufactured in the USA
    • Fits 2015-2017 GT Fastback Mustangs with Factory Manifolds

    Review & Installation Video

    Review & Install Video

    Justin with, here with my quick review of the Stainless Works three-inch Retro Chambered Catback Exhaust System with X-Pipe, available for your 2015 and up Fastback GT. You should be checking out the Stainless Works Three-inch Retro Chambered Catback with X-Pipe if you're a fan of the Stainless Works quality and would like to have a 304 grade material, if you wanna keep things around the $1,000 price point and you want a nice throaty sounding system with just a slight touch of rasp. Now, Stainless Works is oftentimes a very popular choice when it comes to exhaust systems for Mustang owners for a few different reasons. Now, first things first, this is an exhaust after all, so let's quickly touch on the sound you can expect when using this system. And in my opinion, guys, I think the Three-inch X-Pipe version of the Retro Chambered Catback is gonna give prospective buyers the best of both worlds. You've got a low rumble at idle, or in the lower RPM range. But once you start hammering on the car, you do get a little bit more volume and a small and very livable amount of rasp. Now, breaking out the wake-the-neighbor scale, this thing is definitely gonna deliver, I'd say, a three, maybe even a four out of five on my one-to-five or one-to-wake-the-neighbor scale. It is loud, but there are definitely louder systems available. My one small nitpick with this system, however, is the amount of drone I noticed when installed. Now, on our stick car it wasn't terrible. You could tell it was there. However, I have heard that automatic owners have endured a little bit more. Now, some people might wanna hear this system at all times, some people might be okay with that. However, there are gonna be other people that don't wanna hear the exhaust that much inside the cabin. With this installed, you will hear it at all times, both inside and outside of the car. Now, this particular sound is the result of both the chambered mufflers and resonators here, along with the included X-pipe. It's gonna result in a slightly higher pitch, just a little bit more rasp as well. It is worth pointing out that you can buy this exact same system, but with an H-pipe in place of the X-pipe, if that's a sound you'd prefer. Just head over to the product page, check out the H-pipe sound clips and you can compare for yourself. This system does utilize three-inch mandrel bent tubing for the most part here, with the one exception being the two-and-a-half-inch neck down just to connect with the factory-style connection. You can grab this system, however, with their performance connect version, which is going to eliminate this neck down, make it full three-inch from tip-to-tip. But you do have to utilize this system with a set of Stainless Works long tube headers. Now, as I mentioned earlier, the entire system has been constructed from premium 304 grade stainless steel, including the mandrel bent tubing, chambered mufflers and resonators, and the four-inch mirror polish conical wall tips. Now, that 304 grade stainless is going to be the benchmark when it comes to quality, and is a material you'd prefer to see with any stainless steel aftermarket Catback exhaust, because it will be the best at reducing corrosion. Far better than 409 grade stainless steel, or even aluminized steel. The tradeoff, however, is that it usually comes at a price. But Stainless Works does do a good job of keeping the price reasonable, despite the premium build. Now, speaking of price, the Stainless Works option here for the Catback is gonna hover right around the $1,000 price point. But when you consider the quality of build and quality of materials, it really isn't all that bad. Now, other materials or other Catbacks on the site that do utilize full 304 grade stainless, including Cooks, Corsa, and even Borla [SP], they all do offer that stainless steel build, but they are gonna cost you a little bit more than the Stainless Works option here. Installation is definitely not gonna kill you on this one, guys. In fact, expect a relatively simple one out of three wrenches on my difficulty meter here. It definitely will help with the buddy system removing that factory Catback as it is all one piece and can be a little tricky to move around by yourself. After that's out of the way, just get to work installing the new Stainless Works system. I would recommend starting from front to back there, using a socket set or even an impact if you have one. We do call this one two hours on the site, but I wouldn't be surprised if you're making noise in a little less than that. As for my final thoughts on the Stainless Works, well, if you can put up with a little bit of interior drone, you're gonna be getting a great sounding, throaty system that will offer premium materials for a price that's very hard to beat given your other options. So, be sure to check out a Retro Chambered Catback for your S550 GT right here at

    Aggressive Exhaust Note. A Stainless Works 3" Retro Chambered Cat-Back Exhaust system will add the loud aggressive exhaust note of a classic 60's muscle car to your modern coyote powered S550 GT Fastback. This Cat-Back not only sounds great, but also improves exhaust flow with the included X-Pipe for an increase in horsepower, torque and 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.

    Direct Fit Upgrade. This Stainless Works Mustang Cat-Back with X-Pipe includes all the hangers and clamps needed to bolt straight up to the OEM factory location without any modifications required, making it a direct fit, bolt-on replacement upgrade.

    Application. This Stainless Works Retro Chambered Cat-Back with X-Pipe is specifically designed to fit the 2015-2017 GT Fastback Mustang with the factory exhaust manifolds installed. Not compatible with convertibles.

    Fitment: 2015 2016 2017 Details

    MPN# M15CBX

    CA Residents: WARNING: Cancer and Reproductive Harm -

    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
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 304 Stainless Steel Tip Material : Mirror Polished 304 Stainless Steel
    Piping Size: 3" (steps up from 2.5") Tip Size: 4"
    Muffler Type: Retro Chambered 2.5" Core Fitment: 2015-2017 GT Fastback
    Will it fit my Mustang?

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    Customer Reviews (5) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 4.4 4.4
    • Exhaust Note 5 5
    • Fit & Finish 5 5
    • Bang For Your Buck 5 5

    • 5/5

      Installation Time: Less than 1 Hour

      September 13, 2018

      Awesome quality

      Easy installation especially if you have a lift recommend 2 person job


      Year: 2017 Submodel: GT

      Helpful (7)

    • 5/5

      Installation Time: Afternoon

      August 03, 2018

      Excellent exhaust

      Great quality super easy to install and super great sound !!!


      Year: 2017 Submodel: GT

      Helpful (8)

    • 5/5

      Installation Time: Afternoon

      September 26, 2016

      Loud, Adds Character, and A Great Price

      This exhaust is the first I have bought for my 2016 Mustsng GT. I was looking to have a shop install it, but watched a ton of videos and decided to do it with my Dad. We are by no means mechanics nor do we have any extensive knowledge of exhaust, but this was an INCREDIBLY east install, took about an hour of constant work. The hardest part is taking off the factory exhaust. Once installed and tightened down, I started up the car and instantly a smile came across my face. It was exactly what I wanted: Loud, aggressive, but not obnoxious. After stoping on the gas a few times I knew it was going to be the best mod I would ever make on my Mustang. Worth every penny and it fit like a glove, no room to let it sag unless you don't level the initial pipes at the front. I love it! Definitely makes your car stand out.


      Year: 2016 Submodel: GT

      Helpful (14)

    • 5/5

      Installation Time: Afternoon

      June 15, 2016

      The Monster is awake !

      I wanted the loudest Mustang around and now I have it , I love the base of the exhaust in the car rumbling , no need for the radio , I just listen and enjoy the sound of the pipes, also with a lift it went on easy and smooth in about a half hour with a buddy of mine who is the top mechanic at chevy of all places said it was the best fitting exhaust he every installed , bottom line money well spent


      Year: 2016 Submodel: GT

      Helpful (12)

    • 5/5

      Installation Time: Afternoon

      February 24, 2016

      Exactly as described

      Arrived well packaged. UPS poked a hole in the box and one of the mid pipes had a small bend in the end, AM looked after this. Great looking kit. Really clean, easy to install, my son and I did it in a couple hours. Sounds great! Throaty, but not obnoxious. Very happy with this purchase.


      Year: 2015 Submodel: GT

      Helpful (13)

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