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Roush Axle-Back Exhaust (15-17 GT)

Market Price $625.99 You Save 5% ($30.00)
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$595.99

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  • Item 387039

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    Features, Videos & Details

    • Aggressive Exhaust Sound
    • Unique Open-Chambered Muffler Design
    • 304 Stainless Steel Construction
    • Full Mandrel-Bent Tubing
    • 4" Round Stainless Steel Tips w/ Chrome Flashing
    • Fits All 2015-2017 GT Mustangs

    Review & Installation Video

    What's up everybody? Justin with americanmuscle.com. Welcome to my quick breakdown of the Roush axle-back exhaust system available for your 2015 Coyote powered GT. As you guys all just heard, the 2015 Roush axle-back definitely lives up to the claim of being one of the more aggressive axle-back systems available for your new GT. The same was true with the '11 to '14 S197 axle-back, and that same super aggressive tone has definitely found its way over to the new S550 kit. That super angry or aggressive tone does come courtesy of Roush's unique open chambered or hollow chambered mufflers as they call them. These things are unique in the fact that they don't use a traditional fiberglass packing material. This allows for that really aggressive tone you guys heard earlier. At the same time, it's going to keep any interior noise or drone to an absolute minimum. In addition, these mufflers are a straight through design, meaning any performance you might see, while minimal typically here with an axle-back, will definitely be a little bit more than what you might see with a traditional chambered muffler. All right, guys, going over the build quality a little bit here. You will notice what little piping there is has all been mandrel-bent two and a half inches in diameter. The entire system has been constructed from quality 304 grade stainless steel. This does include the four inch slash cut tips. These tips are cool because they do feature Roush's unique new chrome flashing process which they say will help reduce any discoloration over the years. By now, guys, you should know that with any 2015 axle-back install there is some cutting required. However, like I tell you in some previous videos, as long as you take your time and follow some basic guidelines you should be good to go. These guidelines do include making sure you have a nice fresh Sawzall blade on hand, make sure you wear your eye protection of course, and last but not least measure twice and cut once. Thankfully, Roush does include some really nice detailed instructions with this kit on where to cut. As long as you take your time, follow the instructions, you can expect to spend about two hours from start to finish getting this thing bolted up. If you guys are looking for one of the most aggressive axle-back systems from one of the most recognizable names in the Mustang world then be sure to check out the Roush axle-back for your Coyote powered GT right here at americanmuscle.com.

    Aggressive Muscle Car Sound. Let your 5.0L Coyote engine howl with a Roush Axle-Back Exhaust. This innovative new Roush exhaust system features a hollow chambered muffler that results in increased air flow and a unique sound, with no in-cabin "boom" normally found with performance exhaust at cruising speeds.

    Quality Roush Construction. Constructed from mandrel bent 304 stainless steel for a durable long life, the Roush axle-back exhaust system features two unique open chambered mufflers with 304 stainless steel 4" tips. The 4" tips are finished with a brand new chrome flashing process that is resistant to discoloration due to exhaust heat.

    Cut & Clamp Installation. The installation of this Roush Axle-Back Exhaust requires cutting and removing the factory muffler assemblies and clamping the new muffler assemblies in place. Clamps and instructions are provided.

    Application. This Roush Performance Axle-Back Exhaust System is designed to fit the all 2015-2017 GT Mustangs, including Fastback and Convertible models, for both great looks and great sound.

    Fitment: 2015 2016 2017 Details

    MPN# 421834

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    What's in the Box
    • (1) Muffler assembly - Driver Side
    • (1) Muffler assembly - Passenger Side
    • (2) Tips
    • (4) Clamps
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 304 Stainless Steel Tip Material : 304 Stainless Steel with Chrome Flashing
    Piping Size: -" Tip Size: 4"
    Muffler Type: Open chambered Fitment: 2015-2017 GT
    Will it fit my Mustang?

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    Questions & Answers (50)

    5 Top Rated Questions

    Bought a 2017 GT Fastback in December (2017) Will installing these or any aftermarket axle-back mufflers affect my five year warranty from Ford?

    • We suggest reaching out to the dealership to see if the Roush Axle-Back Exhaust will affect the warranty.

    Helpful (9)

    I will have this set for my mustang gt 10/12/17,my question is what is in the inside of these mufflers.

    • The mufflers in the Roush Axle-Back Exhaust will contain Roush's proprietary sound deadening materials to enhance the exhaust note of your Mustang.

    Helpful (5)

    I have an 11 month old son, will this be too loud for him in the back seat? I also have a 2006 with a bunch of work done to it and it is too loud for him to ride in so when my wife and I go to shows I need this to be noticeable louder but yet not too loud for my son. Thanks.

    • Hello! Unfortunately loudness is totally subjective to each person, as far as exhaust systems go, an axleback is the more quiet option. However, Roush is one of the louder axleback exhaust systems. I would recommend trying to find someone local with an axleback setup on their mustang, so you can hear it in person to decide.

    Helpful (4)

    Are these Roush axle back exhaust legal in the state of California?

    • We recommend that you check with your local ordinances to determine if their are any decibel limits, but in terms of emissions you'll have no issues. When it comes to the exhaust, if it's not catalytic converters or headers, you won't have to worry about emissions.

    Helpful (3)

    Will this exhaust pair nicely with the Mishimoto H-pipe? I see all of the pairings going with an X pipe, but I really want that low pitched muscle rumble.

    • This Roush Axle-Back Exhaust does not directly attach to the Mishimoto H-Pipe, item 393882. There will still be stock portion of the exhaust that will be re-used that attaches the h-pipe to this axle-back. As long as that portion of exhaust is the same, the axle-back will fit flawlessly with that H-pipe. http://www.americanmuscle.com/mishimoto-hpipe-1517gt.html

    Helpful (2)
    Post Your Question
    10 More Questions
    I have 2 3 years warranty for my Mustang GT. Is there any warranty issue if I would modify the original exhaust system? 1 answer
    will this fit 2015 GT convertible? 1 answer
    Hi I have a 16' GT Convertible. I love my car, but I want some more sound. I am looking for the deep rumbling sound, not the screaming one. Will Roush Axle-Back Exhaust be the right way to go? As of now, I don't want to spend to much money, just want some more sound. Down the road I am also thinking of getting a Roush Supercharger. (727 hp) Will this setup still be okay if I am getting the Supercharger? Does black tips exist for this ? 1 answer
    will this muffle system void the ford warranty 1 answer
    Any drone heard with this Axle-Back and an X-Pipe? 1 answer
    Does anybody have any suggestions of which x pipe to pair with this axle back? 2 answers
    How much do these weigh? 0 answer
    Are these at or below 95 decibels at 3000 rpm? I'm asking because CA law now has a 95 dB exhaust limit. 0 answer
    When this exhaust is paired with the Roush x pipe... how loud is it in decibels? I live in California and need to know now that the new exhaust law is in place. 0 answer
    Is it suitable for 2017 GT without change original pipe, just do some cutting is worked for the original pipe? As some said this Roush is only for V6 and ecoboost model. 0 answer

    Recommended For You

    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Loudness / Volume 4.361055 4.4
    • Exhaust Note 4.813387 4.8
    • Fit & Finish 4.864098 4.9
    • Bang For Your Buck 4.738337 4.7



    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      February 19, 2019

      Awesome sound

      Fantastic fit and finish. Only slightly more rumble when cruising at highway speed but when you press the gas it lets you know it’s there. Sounds amazing and makes me smile everyone I press the gas.

      ChrisB

      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      February 15, 2019

      Roush.....Rules

      This Roush axle back is exactly what I was looking for.... perfect sound at startup and perfect sound while driving......not too noisy to wake the neighbors.....no drone.....easy to install.... the polished tips are awesome must have.....my ride......2015 Mustang GT 5.0........

      Chan

      Year: 2015 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      February 12, 2019

      Perfect

      Install was simple and exhaust gave the perfect deep rumble without any drone.

      Navi

      Year: 2016 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      February 11, 2019

      Great sound

      Exactly what I expected! Two thumbs up. Awesome growl and ultimately brings the car to life

      CodyK

      Year: 2017 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      February 10, 2019

      Perfect!

      I installed these on my ‘16 GT convertible. Fit great, sounds awesome

      Randy1234

      Year: 2016 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Less than 1 Hour

      February 03, 2019

      Satisfaction Guarantee

      Roush did a fantastic job designing these and they fit perfectly. This is an AMAZING kit. I installed it myself in less than 60 minutes

      OneilA

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      February 03, 2019

      Roush Axle-Back Exhaust

      The system is exactly what I wanted and that is a sound that matches the look of the car. My son and grandson both have mustang GTs and they think the sound is great.

      LaddieH

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      January 28, 2019

      Roush Axle Back Exhaust - Awesome Sound

      The sound is fantastic and makes my 2017 Mustang GT California Special very enjoyable to drive. It is definitely an eye catcher. So Happy I purchased it.

      NatalieS

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      January 16, 2019

      Beautiful roar !

      It’s much nicer and louder than I expected, I installed it in an hour with the Ford racing x pipe, never sounded better!

      Mo

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      January 08, 2019

      Mean machine....

      Loving the sound. It was just what I needed to bring the engine alive - without disturbing the neighbors...

      DavidB

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      January 05, 2019

      Brings your Stang to life

      Before I bought this I was thinking about doing the Roush H pipe in addition well after I heard this installed I quickly found out no other exhaust mods are needed ! These axlebacks gets the point across and gets the point across well ! I love the sound and volume its loud enough to be noticed but not so loud the police are harassing you . Had chain exhaust shop install and they recommended spot welding only charged me an hour labor

      jeffm

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      January 03, 2019

      Great Exhaust for the Money!

      Quiet when just cruising or taking a trip,but sounds great when you get on it,and going through the gears!

      WinstonM

      Year: 2015 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      January 03, 2019

      I just bought your neighbours an alarm clock

      This is the best sounding alarm clock they have heard or will ever hear. I installed these on Christmas morning and have never been happier with an exhaust sound. I have an H pipe installed with this set mufflers and the sound is amazing. There is a happy little set of Kooks Long Tube Exhaust headers in my garage that will complete the perfect sound. This axle back is loud and a little raspy, but you get that rich, base riddled low end sound and the sweet melody of high end RPM exhaust sound. The construction quality is great and the fit was perfect. Also, the tips are beautiful and I gave this a 5/5 on the loudness however, it is not as loud as a straight pipe, but it is still loud enough to drown out the ricers in traffic.

      JustinM

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 23, 2018

      No drone!

      Went from straight pipes to these and totally killed all the drone. Sounds much sharper and cleaner, can hear exhaust clearly without any drone at all with windows rolled up

      MohamadK

      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 23, 2018

      Excellent Sound

      The sound is great. Not over the top at all but very aggressive sound. After driving a week I did add the x pipe and that is over the top on cold starts. I HIGHLY recommend the Roush!!

      Randy

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 19, 2018

      Roush exhaust

      Baby roars. Love it. I would recommend. Bought it for a 2016 mustang GT

      Jacob

      Year: 2013 Submodel: GT500

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      December 17, 2018

      Roush Axle-Back

      Fantastic deep thoarty sound that really turns heads. As reviewers attested it has very minimal interior drone. I am delighted with this purchase. Oh yes, the chrome exhaust tips are beautiful.

      TomC

      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      December 14, 2018

      Exactly We Wanted

      Simple installation and it gave us just the sound we were looking for.

      JasonM

      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      December 13, 2018

      Amazing

      This sounds amazing. I partnered it with a resonator delete H pipe and the deep tone with the Roush is incredible.

      KevinR

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      December 10, 2018

      Vicious symphony

      This exhaust is the best in my opinion. From opening up on the road to the deep tone u get sitting in a drive thru. Paired w full off-road exhaust your car and neighbors will love it.

      Red

      Year: 2017 Submodel: GT

      Helpful (3)

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