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Stainless Works 3 Inch Retro Chambered Cat-Back Exhaust w/ H-Pipe (15-17 GT Fastback)

Item 384842
Market Price $1,437.16 You Save 12% ($165.34)
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      Review & Installation Video

      Hey, everybody. I'm Justin with, and this is my breakdown of the Stainless Works Retro Chambered Catback Exhaust System with H-Pipe, available for your 2015 Mustang GT. If you guys are looking for a high quality, perfect fitting catback system that will give your Mustang that old school muscle car rumble, well, then you have to check out the Stainless Works Retro Chambered three-inch system for your S550. Now, as you've just heard, this system will give your Coyote-powered GT that old school throwback Mustang sound that was big with the hot rods back in the day.That deep rumble is a combination of the included H-pipe here, along with Stainless Works' unique retro chambered mufflers. Now, these things are unique in the fact that they do offer a straight-through design along with that straight-through performance, but they do have enough baffling that's gonna keep any excessive rasp to a minimum, that can sometimes come along with having a straight-through muffler. Now, because of this, you can expect a relatively tame tone while cruising around, but these things really do come to life when you get into it. And the best part is absolutely zero drone while on the highway. All right, guys, as for the construction, we're looking at 3-inch mandrel bent tubing, all of it which has been made from 304-grade stainless steel, including these 4-inch mirror polished conical wall tips. We would like to point out since you are ditching that heavy factory exhaust and suitcase style resonator and switching to a full stainless system here, you're gonna be shaving roughly 20 pounds off the car, which is never a bad thing. Another big thing I wanna point out here is that this particular catback that I have in this video is designed to work specifically with 2015 Mustang GTs that still have the factory manifolds or factory headers in place. Now, if you guys are looking to do long tubes down the road or maybe at the time of the purchase of the exhaust, then you should definitely check out the Stainless Works option with the performance connect, meaning it's designed to work specifically with those Stainless Works long tube headers. When it comes time to get dirty, guys, you wanna leave yourself about two hours to get this catback installed from Stainless Works. I will say that doing the exhaust systems on the 2015s have been made a lot easier, thanks to the addition of the independent rear suspension. But either way, give yourself a couple of hours, grab an extra set of hands if you can, and make sure you have a good set of quality tools before you get started. As always, if you have any questions about this particular system here or about the install itself, feel free to reach out to a Mustang expert any time. So if you're looking for a well-built, great sounding system, and really prefer that old school muscle car rumble. Well, then you guys are gonna have to check out the Retro Chambered Catback Exhaust System from Stainless Works, available right here at

      Product Information

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


      • 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 H-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


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

      Muscle Car Rumble. The included H-Pipe not only helps increase power, but it also adds a deep muscle car rumble to the sound of your exhaust with its classic "H" 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 H-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 H-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# M15CB

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (41)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 41 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • September 04, 2019

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

        Just what I wanted

        Easy install, need to adjust after a few times but then it's good. Amazing tone deep rumble with just a hint of rasp

        Helpful (0)
      • January 27, 2019

        5 2015 GT - AlexanderS Installation Time: Less than 1 Hour

        No regrets

        Afetr having looked over what seems like thousands of sound clips for various different exhaust kits, i decided on selecting this one. Let me tell you i have no regrets. The exhaust note is perfect. Not obnoxious or raspy, but a nice deep tone. 10/10 would recommend

        Helpful (2)
      • November 01, 2018

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

        Stainless works retro catback

        Took me about an hour and a half to bolt it onto my car. It has the low old school rumble which is awesome. A little louder than I thought it was going to be but definitely not going to complain about it at all. No raspy tin can sound, but does done a bit in 6th gear. I would buy it again no problem if I was starting over.

        Helpful (5)
      • August 05, 2018

        5 2016 GT - JohnL Installation Time: Shop Install

        Very Nice!!!

        The look and sound is amazing out of this exhaust. I think it's just right!!! Especially in sport mode,,, we have a 16 GT Premium and was a little worried about some of the other reviews, but top notch sound,,, idle is better, wake the neighbor isn't that bad, just a great sound!!! Thank You

        Helpful (7)
      • July 03, 2018

        4 2015 GT - P51GT Installation Time: Less than 1 Hour

        Great Sound But Drone at Highway Cruising

        Beautiful 60's Muscle car sound and it looks great. There is a very noticeable drone at highway cruising 1700-1900 rpm. Not sure why more people are not mentioning this as it is an issue if you are doing a long trip. I have the Manual 6 speed and the drone is only there in 6th gear at those rpm's otherwise the system has an amazing sound. If i plan to do a long trip i will swap the exhaust out at home. Does not take long to swap.

        Helpful (8)
      • June 20, 2018

        3 2017 GT - PatrickJ Installation Time: Afternoon

        OK but not great

        I have mixed thoughts on this exhaust system. First, the positive...I love the sound. This thing makes my 2017 GT sing the right song and hit all the right notes. is MUCH LOUDER than I expected. Not so loud that I would remove it, but loud enough that I would not buy it again. Also, the alignment is difficult to achieve and maintain. After a couple of different times on the lift, I am still struggling to get the driver side tip to remain centered in rear valence. I called the manufacturer, sent them some photos, and they failed to call back or offer any suggestions.

        Helpful (7)
      • June 19, 2018

        5 2017 GT - MURFS03 Installation Time: Shop Install Installation Cost: $100-$250

        Awesome Muscle Car deep tone and exhaust note!!

        I truly believe, that I must have listened to 100's of exhaust sound clips on the internet before making a decision to buy this exhaust system. I wanted a new exhaust system that didn't sound raspy when paired with the Coyote power plant. This system absolutely delivers the Muscle Car sound I was wanting and desiring to the point I feel like Steve McQueen in his 1968 Mustang GT fastback 390 4v!! I cannot get over the deep muscle car like exhaust note this system produces, which only seems to be getting better during the past 6 weeks of ownership!!! If you're as particular as me and are wanting a deep tone and not a raspy tone like the other exhaust systems, then don't wait and buy this one because you'll not be disappointed!!

        Helpful (11)
      • May 31, 2018

        5 2015 GT - KeithH Installation Time: Less than 1 Hour

        Deep Rumble. Like the older cars

        The sound that this system makes is great. A deep tone rumbling. Like the old exhaust. I’m older and mid mufflers were to loud for me at hi speed. American Muscle got me New mids to tone down. Love The Sound

        Helpful (11)
      • March 28, 2018

        5 2016 GT - BrandonK Installation Time: Afternoon

        Overall Great Purchase

        Install was pretty easy, resonator was rusted on so we had to cut stock exhaust, but otherwise was easy to mount. Exhaust note is fantastic, not loud by any means but defiantly gives the Coyote a stage to sing its beautiful song on. Have not dyno'd yet, waiting on the matching manifolds to come in.

        Helpful (12)
      • February 17, 2018

        4 2017 GT - BlakeP

        Sounds great

        Sounds better than any exhaust I’ve heard for the S550, It’s loud but not too loud, and it sounds like an old muscle car with a real deep tone. The video on AM sounds similar to it but not exactly how it sounds. When I heard the sample video I didn’t like how it sounded higher in the RPM range but it doesn’t sound like that in person. I find myself downshifting a lot more just to hear it. It sounds it’s best between 1500 and 3000RPM. I have a manual GT/CS with 3:55’s and on the highway (60MPH) I’m turning around 1500-1700RPM and it does have some drone, nothing too bad but it’s enough for me to slow it down to about 57MPH to get out of it. The only complaint I have about it was the fitment, one side hangs lower than the other and I need to adjust it.

        Helpful (9)

      Questions & Answers (14 answers)

      5 Top Rated Questions

      What is the sound difference between this H-pipe version and SW's X-pipe version?

      • With the H-pipes these will be deeper and more of a classic muscle car sound! Whereas the X-pipe will be more so on the raspy side and more of a newer car sound.

      Helpful (4)

      Am I going to wake the neighbors with these? If it's only a few, that's okay :) I live in an apartment complex and don't want to be 'that guy', if it can be helped. I'm getting ready to replace the stock sound.

      • These are going to be louder than factory, however, not overbearing in volume and has a classic sounding deeper rumble.

      Helpful (2)

      Do they come with clamps?

      • The Stainless Works 3 in Retro Chambered Catback Exhaust reuses the factory exhaust.

      Helpful (1)

      What kind of horsepower gain can I expect from this exhaust system?

      • We do not have horsepower ratings on our exhausts as the horsepower numbers are rarely affected with a new exhaust setup.

      Helpful (1)

      Keeping in mind I have no current plans to supercharge my S550; what is better for overall performance gains with bolt-ons: this system? Or the LMF 3in core system?

      • Both systems will offer around the same performance gains because they are the same 3 inch diameter.

      Helpful (1)
      Post Your Question
      9 More Questions
      Will this set up fit kooks long tube (off-road) headers on my 2016 GT? If not, is there an adapter or connection I could purchase to fit this cat-back? 1 answer
      Is this exhaust as loud as the Corsa Sport Cat-Back? 1 answer
      Does the system in the video have the 2.5" or the 3" inner core? I know its a 3" system...but the inner core size is optional, do we know which was used? 2 answers
      Will this fit a convertible 2015 GT? 1 answer
      Will this work with pypes off road long tubes? 1 answer
      Is this 50 exhaust state legal? 1 answer
      Will this be compatible with the BBK 1 3/4 Ceramic Long Tube Headers with catted mid-pipe adapter? The adapter says it will fit with any 2.5in catback system, but want to make sure. Thanks. 1 answer
      will it fit my mustang if I have headers that are made to fit a factory exhuast 1 answer
      Will this fit a 15 GT convertible? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Right Muffler Assembly
      • (1) Left Muffler Assembly
      • (1) H-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" (steps up from 2.5")Tip Size:4"
      Muffler Type:Retro Chambered 2.5" CoreFitment:2015-2017 GT Fastback

      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 with factory manifolds only.

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