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Roush Axle-Back Exhaust (18-20 GT w/o Active Exhaust)

Item 404877
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    Features, Video & Details

    • Aggressive, Raspy Exhaust Note
    • Unique Open-Chambered Muffler Design
    • 304 Stainless Steel Construction
    • Full Mandrel-Bent Tubing
    • 4" Quad Tips with Chrome Flashing
    • Fits 2018-2020 GT Mustangs Not Equipped with Factory Active Exhaust

    Review & Installation Video

    Review & Install Video

    Aggressive Raspy Sound. Designed for 2018-2020 GT Mustangs that are not equipped with the factory Active Exhaust, this Roush Axle-Back Exhaust will let everyone know you have arrived with its aggressive raspy sound. This innovative new Roush exhaust system features a hollow open chamber 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. Roush manufactures their exhaust systems from mandrel-bent 304 stainless steel for durability and corrosion resistance. This Axle-Back Exhaust features two unique open chambered mufflers that improve exhaust flow. The system includes two dual wall 4 inch quad tips that are finished in a new chrome flashing process that is resistant to exhaust heat discoloration.

    Cut & Clamp Installation. The installation of this Roush Axle-Back Exhaust will require 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 2018-2020 GT Mustangs that are not equipped with active exhaust from the factory.

    Fitment: 2018 2019 2020 Details

    MPN# 422097

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

    What's in the Box
    • (1) Driver Side Muffler Assembly
    • (1) Passenger Side Muffler Assembly
    • (1) Driver Side Y Exhaust Tip
    • (1) Passenger Side Y Exhaust Tip
    • (4) Clamps
    • Instructions
    Installation Info
    Will it fit my Mustang?

      Customer Photos (32) Submit Your Photo

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        Questions & Answers (9)

        5 Top Rated Questions

        Can I just get the roush dual exhaust tip?

        • Unfortunately the Roush quad tips are not currently offered separately.

        Helpful (1)

        Will these fit a “19 GT Premium convertible?

        • This will fit your vehicle, so long as it is not equipped with active exhaust.

        Helpful (0)

        Will these void your warranty in any shape form or fashion?

        What size pipe on these, 2 1/2 or 3'?

        • The tubing diameter is 2.5".

        Helpful (0)

        Will it pass CA emission requirements?

        • With California's new exhaust laws, more than likely it will not. We recommend checking with your state ordinances or a local shop.

        Helpful (0)
        Post Your Question
        4 More Questions
        I have a 2018 GT.. I Don't have the active exhaust..so will this still work on my car? 0 answer
        Is this 2 1/2" tubing or 3inch? 0 answer
        Will this fit on the "16" GT Premium. I already have the Roush axle back single tip. Want to change to quads. 1 answer
        Your loudness level graphic shows higher for the black tip system than the chrome tip system. I assume these are the same mufflers and the two actually sound the same? What is so different on the black tip besides the price that makes it way louder on your loudness level?.....Thanks 1 answer

          Customer Reviews (41) Write a Review

          Overall Rating 4.9

          out of 5 stars

          Installation Time:Afternoon

          Installation Cost:$250-$500

          • Loudness / Volume 4.641026 4.6
          • Exhaust Note 4.897436 4.9
          • Fit & Finish 4.487179 4.5
          • Bang For Your Buck 4.692307 4.7



          • 5/5

            Installation Time: Afternoon

            September 23, 2019

            Aggressive, love the sound

            Very aggressive sounding, its quiet at lower RPMs, but cold start and when you get on it, sounds amazing, definitely want to go a bit louder, I would put this at a 4 for loudness in my opinion. H-pipe is next, can't wait! install did take a little longer than anticipated, also don't be afraid to use extra jack stands, may come in handy. o_O

            ARodriguez

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            September 10, 2019

            Best exhaust ever!

            Second mustang installed on. If you want non factory exhaust, this is the one. If it isn’t loud enough add the x-pipe.

            AnthonyH

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            September 01, 2019

            Sounds great

            Sounds awesome and it’s not too loud. Just what I needed.

            Tking08

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            August 26, 2019

            monster sound for the money with little drone

            Easy installation and everything lined up nicely . The sound is literally like a mountain lion growl -and purr. Very very beastly but with the shortcoming of a little drone between 1200-1800 rpms . Overall the sound makes up for the little drone suffered . Although many people say there is no drone , I read somewhere that it's the positioning of the tips the cause the BOOM or drone .I have to mess around the tip fitment to see if it goes away . However overall , like I mentioned above when you put the pedal to the metal the sound makes you smile hard! I just purchased magnaflows tru x -reaonated free flow x pipe to make it drone free and also get rid of the suitcase resonator that comes stock .. loving this new axleback

            coyotebreath94

            Year: 2019 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            August 16, 2019

            Roush axle back

            Couldn’t be any happier with the sound, super easy to install

            GTRider1998

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Afternoon

            July 28, 2019

            Roush delivers

            I ordered this thinking i would not need the catback and I was definitely right. The first time i started it i said wow. Coming from an eco this thing blew my mind. Roush has me in love with the new noise my car is making

            Reece

            Year: 2019 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Less than 1 Hour

            July 27, 2019

            Roush Axle-Back

            This axle- back has to be the best sounding exhaust for the s550 in my opinion.Definitely a head turner. Is not to loud in the lower rpm range but as soon as you get the rpms up you really hear it growl. I also paired this system with the sr X pipe. That really woke it up even more. If you like your car loud this is a great buy. One of the best features is there is hardly any drone at highway speeds.

            RubyB

            Year: 2019 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Afternoon

            July 13, 2019

            Excellent Exhaust - No Drone!

            Easy to install. Jack, jack stands and saw. 2 -4 Hours. Complete. IMO best sounding exhaust without being over the top.

            LeeO

            Year: 2018 Submodel: GT

            Helpful (0)

          • 4/5

            June 03, 2019

            awesome sound

            the Roush Axle-Back sounds like a beast!!! what a difference compared to the stock. really happy with the decision! only thing that bugged me is the large gap between the tips and the rear valence. would look so much better if the gap was less (in my opinion).

            PeterF

            Year: 2019 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            May 14, 2019

            sounds awesome

            Wife's reaction priceless when cold starting at 6 a.m.! In all seriousness though, it sounds great, and it isn't too noisy when driving at steady speeds. It installed easy. I had the same exhaust for my 2017, and I was happy enough to stick with the same brand.

            nik8771

            Year: 2019 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Less than 1 Hour

            May 10, 2019

            Good but sit low

            Overall good quality and volume. Have a Flowmaster Scavenger X-pipe and now with Roush axle back get that good growl to it. Definitely a head turner but only issue i have is the hanger on the mufflers are to long so the tips sit low. A good exhaust shop can refit a new hanger to fix this but going to cost extra.

            AndrewH

            Year: 2018 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Less than 1 Hour

            May 09, 2019

            Great Sound

            Very happy with the sound of the Roush Axle-Back Exhaust

            WilliamS

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            May 05, 2019

            Easy Install!!!

            I swear me and my buddy took about 15 min to install them. Sounds very AGGRESSIVE

            SiuH

            Year: 2018 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $250-$500

            April 20, 2019

            Awesome Sound!

            This is my 2nd time using the Roush Axle-back exhaust kit. I had it on my 2014 Mustang GT and now on my 2019 Mustang GT with Performance Pack 1. It has its signature Roush sound and I hear it more in the 2019 in the lower RPM band, Love it! The only negative mark is the size of the the dual tips. They dont fill in the entire space thats there. Kind of disappointed in that aspect. Overall, it sounds great! As far as cost of the install at the Ford dealership, $322 in labor, ouch! I wasnt at all happy with that

            Roushfan

            Year: 2019 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            March 16, 2019

            Waking the neighbors

            I bought this for the reason of waking up my car and along with the double helix x pipe from Corsa it has done the trick. Awesome sound and joy so bad at idle that you are annoyed or. Othering people. Add throttle and add the sound of a motor that’s been opened up and awakened. Time to install less than an hour by a professional and welded to prevent any leaks. Lines up perfect and looks awesome.

            NicholasL

            Year: 2018 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            March 11, 2019

            2019 mustang GT axel back

            My car sounds awesome with the roush axel back and H pipe, love the pops and crackles it makes

            Mustang6969

            Year: 2019 Submodel: GT

            Helpful (0)

          • 3/5

            February 18, 2019

            Loud outside but too quiet inside

            The exhaust is crazy loud outside but i did not like that the car is very quiet inside its way more quiet than stock inside so now i dont even know if im going to keep it or sell it also another thing i did not like is that the exhaust tips are way to small for the car so they look kinda wierd

            MariaF

            Year: 2019 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Shop Install

            February 03, 2019

            Sound Great!

            I bought this exhaust set for my wife for Christmas... She loves it! I had my buddy at our local muffler shop install it. It took them about 45 mins. He installed it for free when he found out she had gotten it as a Christmas present.

            Chad

            Year: 2018 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Less than 1 Hour

            January 22, 2019

            First mod for my new S550

            Ordered this exhaust from AM on a Wednesday and got it today (Tuesday). Everything boxed securely. Cosmetic finish of the setup is good. The welds look OK a little chunky and splattery but of course nobody sees the welds when it’s installed. The tips are nicely polished and have the Rousch ‘R’ lightly white laser etched an inch tall on the left side of the left tip set and right side of right tip set so it shows when installed. Rousch is also stamped on the bottom of each muffler, Two Rousch decals included in the box. Installed after putting the car on jack stands. Note if you’re doing it on stands there is very little clearance for the sawzall and blade so you’ll have to cut the pipe from the bottom up. Cutting the stock exhaust off was easy with a carbide Diablo sawzall blade. Took at most 10 seconds per side after finding the right spot to cut. Both mufflers slipped into the rubber isolators and into the cut exhaust stubs with ease. 3/8” impact driver with 15mm deep drive socket was plenty to get them secured. Tips fasten with the same size clamps and weren’t too hard to get on straight. When looking from the back the tips look like they hang low but it’s an optical illusion. The tip material is thicker than factory and the inner diameter looks a little smaller. They have the same drop as the factory ones. Total job took 40 minutes but I do similar work daily so plan for 1.5 hours if you don’t do much work with tools. This was my first modification to my PP1 ‘18 GT. With the resonator still installed it really wakes up the sound just to that perfect sweet spot. This is my 80 mile commute daily driver and on the way to work there is less cabin noise than factory cruising at 70-80mph. But get it over 2K RPM’s and you’ll really know it’s there. Get it over 5K rpm and it screams how you want it to. Overall the sound is cleaner, more pronounced, but not excessive. Deeper bass tone than factory, more rasp, some extra pops when revving and downshifting. Definitely recommended if you like the stock exhaust sound, but you want more of it. This is the loudest I would personally want for a daily driver. Would recommend and buy again. Thanks AM and Rousch!

            JakeH

            Year: 2018 Submodel: GT

            Helpful (6)

          • 5/5

            Installation Time: Less than 1 Hour

            January 14, 2019

            Awesome sounding exhaust

            Awesome sounding exhaust paired with an xpipe. So glad i purchased this exhaust.

            Kevin

            Year: 2018 Submodel: GT

            Helpful (2)

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