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Roush Axle-Back Exhaust (15-17 GT)

Market Price $599.99 You Save 4% ($25.00)
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$574.99

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  • Item 387039
  • MPN# 421834

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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

    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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    34 Questions / 36 Answers

    Ask a Question

    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.

    ErbStalk

    • 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.

      Doug P

    Helpful (3)

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

    JamesC

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

      AshleyK

    Helpful (2)

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

    Killbuzz

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

      Rob D

    Helpful (2)

    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.

    AnthonyH

    • 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

      AMJEFF

    Helpful (2)

    I have 2 3 years warranty for my Mustang GT. Is there any warranty issue if I would modify the original exhaust system?

    LaszloL

    • The Magnusson Moss Warranty Act: US Code – Title 15, Chapter 50, Sections 2301-2312, was created to protect consumer warranties. According to this act, a manufacturer such as Ford cannot void the warranty of a vehicle due to the use of an aftermarket part unless they can prove the aftermarket part directly cause or contributed to the failure of the vehicle.

      AMKody

    Helpful (2)

    will this fit 2015 GT convertible?

    LarryM

    • This will fit with the 2015 GT convertibles.

      KevinD92

    Helpful (2)

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Loudness / Volume 4.348557 4.3
    • Exhaust Note 4.8125 4.8
    • Fit & Finish 4.850962 4.9
    • Bang For Your Buck 4.740385 4.7



    • 5/5

      June 18, 2018

      Roush thunder

      This exhaust system made me feel like I was driving on the race track all day long, the deep growling sound will get you in trouble. Be safe

      KimJ

      Year: 2015 Submodel: GT

      Helpful (0)

    • 5/5

      June 18, 2018

      Awesome sound

      Gives the car a nice mean sound. I also added an H-pipe. Nice setup. Made the right choice.

      gunny42

      Year: 2016 Submodel: GT

      Helpful (1)

    • 5/5

      June 17, 2018

      Roush Axle-Back Exhaust

      Love this exhaust and the sound it produces especially on my 16' California Special

      JuanJ

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      June 14, 2018

      I love this!

      One thing about my mustang that I never liked was the noise. From the factory it sounds like a Prius. I was always nervous to put an aftermarket exhaust on because I thought it would be too loud on highway drives. But I finally pulled the trigger with the Roush kit. I wish I would have done this 3 years ago! It sounds great when you get on it and just fine on the highway. I think a monkey could install it. It look me longer to jack up the IRS car and make sure it was safe than it did to install the kit.

      Chris

      Year: 2015 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      June 11, 2018

      Great sound

      Perfect tone that should have come with the GT in the first place. Actually sounds like a V8 now.

      Tyler

      Year: 2017 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      June 11, 2018

      Pairs great with the H pipe

      I paired the roush axle backs with the misiimoto H pipe and the growl my car makes will knock your socks off. As for the install the left side was a breeze but right side ate up most of the time. Had to go get a pipe expander because was too small.

      JosephB

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      June 11, 2018

      Great product

      Very easy to install just need the right tools and the ability to get your car off the ground a few feet safely. With a few extra hands the install was easy but the roush instructions are a little unspecified compared to the CJ ponyparts video.

      PatH

      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      June 07, 2018

      Great affordable add on

      Amazing add on that is easy to put on. I have a 17 convertible gt. And no excessive drone on the highway with the top down. Caution if you add the X pipe like I did it is crazy loud if your on the throttle too much. Wondering if I should not have done the x pipe. On a good note. Even with the x pipe highway speeds are drone free

      TravisM

      Year: 2017 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      June 06, 2018

      Simply amazing

      It gave my car a rich deep sound on moderate throttle but on wide open throttle it sounds delicious. I’m no expert but the car seems to rev stronger in higher RPM’s, guessing the OEM was quite restrictive. I definitely highly recommend as a first mod!

      Ahmed

      Year: 2015 Submodel: GT

      Helpful (2)

    • 1/5

      Installation Time: Less than 1 Hour

      June 06, 2018

      Too Loud for me..

      First the rating is not a reflection of the quality or it not doing what was described. My case I have BBK long tube headers and the combination sent this off the chart in the volume arena.

      JimV

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      June 05, 2018

      Easy piecy

      Totally a great buy. Easy to install great sound. Would defenatly recommend.

      KenL

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      June 03, 2018

      Sounds amazing !

      Great quality , one muffler sits slightly lower then the other though. Almost as if the hanger is longer. Over all a good product and amazing sound !

      PaulD

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      June 01, 2018

      The way the S500 should sound

      Best money you can spend modding your S550. TYhe car sounds perfect now.

      WT

      Year: 2016 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      June 01, 2018

      Roush Axle-Back Exhaust on 2017 Mustang GT

      These have a nice low rumble at idle. You can here a little additional volume when loading the engine down but is nice and loud when you drop the hammer. Also no drone inside when out on the highway at 60-70 mph. Just what I was looking for.

      GregF

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      May 31, 2018

      Roush axel back exhaust

      Great product. Has nice deep tone to exhaust without being obnoxiously loud.

      CharlieP

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      May 22, 2018

      Exactly what I wanted

      I pared this axle back with an SR performance x pipe and it’s exactly what I was looking for. One of the best and affordable set ups I’ve ever owned. That’s coming from a prior 04 cobra, 00 GT, 95 GT and 91 GT owner. I’ve had set ups from complete off road with long tube headers and x pipe with straight through mufflers down to the often settled for multi chamber flow masters with turn downs. If you want a smooth /deep very manageable tone at low rpms, but with every blip of the throttle it screams to red line get this axle back and pair it with an x pipe of your choice. You won’t be disappointed for the $$.

      ChadH

      Year: 2017 Submodel: GT

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 20, 2018

      My first mod

      My Roush mufflers arrived when promised. Installation took less than an hour. Was so pleased with the sound coming from my GT.

      ChrisC

      Year: 2015 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      May 20, 2018

      Excellent sound

      I had a little trouble with the cut, but I'm sure if you just buy a good carbide blade and not cheap out it would make things much smoother

      LawrenceM

      Year: 2017 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      May 14, 2018

      Roush

      It fits perfect and the sounds is just right! Can’t wait to add an x-pipe to make it sound louder!

      Marcial

      Year: 2016 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      May 10, 2018

      Loud

      Loud... a little too loud, without the resonator that is.

      Slacker

      Year: 2015 Submodel: GT

      Helpful (1)

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