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Flowmaster Outlaw Axle-Back Exhaust w/ Black Tips (18-20 GT w/ Active Exhaust)

Item 404841-B
Market Price $1,107.99 You Save 12% ($128.04)
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$979.95 (kit)

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    Features & Details

    • Axle-Back Exhaust
    • Give Your Mustang a Powerful Sound
    • Stainless Steel Construction
    • Dynamometer-Tuned
    • Mandrel-Bent Tuning
    • Four Inch Broad Black Tips
    • Very Loud Sound
    • Easy Installation
    • Lifetime Limited Warranty
    • Fits 2018-2020 Ford Mustang GT with Active Exhaust
    Get Your Axle Back. When it comes to modifying your 2018-2020 Ford Mustang GT’s exhaust system, new pipes are going to be top of the list. And making sure you have a great axle back system like the Flowmaster Outlaw Series Axle-Back Exhaust with Black Tips is going to go a long way to making things even better.

    Designed to Perform. These pipes are made from strong, 3-inch wide 409 stainless steel. They’ve been mandrel-bent to ensure that no exhaust pressure points happen and they end in powerful 4-inch polished black tips.

    Super Sound Profile. This kit is designed with the signature outlaw mufflers, which end up giving the aggressive sound profile you’ve come to know and love from these systems. The system is fully dyno-tuned to make sure it provides the maximum performance possible.

    Installation. This kit needs hand tools, a car lift or jack stands, and about 4 hours to install correctly. Please have this done professionally if you lack the tools or expertise to make sure it’s done correctly.

    Limited Lifetime Warranty. This Flowmaster Outlaw Series Axle-Back Exhaust with Black Tips is protected by a limited lifetime warranty, defending against material and manufacturer’s defects. Please see Flowmaster’s full warranty for more details.

    Application. This Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips is designed to fit 2018-2020 Ford Mustang GT models with active exhaust.

    Fitment: 2018 2019 2020 Details

    MPN# 817824

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (2) Pipes
    • (2) Mufflers
    • (2) Exhaust Tips
    • Mounting Hardware
    Installation Info
    Will it fit my Mustang?

      Customer Photos (10) Submit Your Photo

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        Questions & Answers (10)

        5 Top Rated Questions

        Flowmaster Outlaw Axle-Back Exhaust w/ Black Tips do you need any modifications to install on a 2018 GT with active exhaust or is it a direct install?

        • This would not require any modifications for the install.

        Helpful (2)

        Do you have to move the valves or the motors to use the active exhaust , or is it a direct install om a 2018 GT ?

        • This Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips is designed to fit (Without modification) 2018-2019 Ford Mustang GT models with active exhaust.

        Helpful (2)

        Do these mufflers have valves in them and still be able to switch through modes?

        • Yes, these mufflers will still allow you to switch through the exhaust modes.

        Helpful (2)

        Would this fit with the Roush cut and clamp x-pipe for the 2018-2019 or does it require the scavenger x-pipe from Flowmaster?

        • This will work with the Roush x-pipe yes.

        Helpful (1)

        I had this exhaust installed by the local meineke muffler shop on my 2018 GT with the active exhaust. My question to the experts is are the valves in the muffler open while the car is in park/stationary or only on the highway or road once the car reaches a certain speed? I don't see the vales open when I idle the car and move to active exhaust to the different levels. Just want to make sure this unit was installed correct. Please advise and thank you!!

        • The valves on this Flowmaster Outlaw Axle-Back Exhaust should perform just like the OEM exhaust, with the valves closing normally, but opening under hard acceleration.

        Helpful (1)
        Post Your Question
        5 More Questions
        I have a 2019 with a SR performance x pipe will this axle back fit with the x pipe i installed? 1 answer
        Will this fit the Borla Switchfire X-pipe? Assume yes just want to check before purchase. 1 answer
        Are there any videos for exhaust sounds after install? I already did a res delete X pipe and would like to see how the quiet mode works after the install, as the factory exhaust still deafens it well. 1 answer
        Will this fit with a roush h pipe? 1 answer
        Does anything like this exist for a 2011 GT? Double Pipes 1 answer

          Customer Reviews (5) Write a Review

          Overall Rating 5

          out of 5 stars

          Installation Time:Full Day

          • Loudness / Volume 5 5
          • Exhaust Note 5 5
          • Fit & Finish 4.8 4.8
          • Bang For Your Buck 5 5

          • 5/5

            Installation Time: Afternoon

            August 02, 2019

            Extremely Loud - Please Read

            I paired this with a Borla Switchfire X-Pipe (already installed) and I've already started looking for a new exhaust system. I absolutely love the tone of the exhaust, however, there is drone around 1600-2000 RPM in all four modes. I tested the "quiet" start and while the sound was muffled a bit, it does not do much. Quiet mode also doesn't seem to muffle much of the sound, so once you get up to 70 it is always there. I blame I have rated 5 stars because I am sure this is exactly what some people want in a mustang exhaust - deep, thunderous, loud, heads turning to you even in quiet mode. I'll probably go back to the stock system w/ my xpipe within the month. Perhaps I care too much about the ears of those living around me =)


            Year: 2018 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            August 01, 2019

            Loud aggressive as F!#@

            Real true muscle car sound. Matted to hpipe and catted Long tube headers and OMG.. definitely head turner low throaty growls..


            Year: 2019 Submodel: Bullitt

            Helpful (1)

          • 5/5

            Installation Time: Afternoon

            April 30, 2019

            Incredibly Loud

            This is how any be mustang should sound, deep and thunderous. The exhaust note is amazing and not high pitched like other exhaust options but very deep and aggressive. The idle sound is definitely noticeable and loud. This exhaust turns heads everywhere you go. The black tips are matte finished and look incredible as well.


            Year: 2018 Submodel: GT

            Helpful (1)

          • 5/5

            Installation Time: Shop Install

            December 05, 2018

            Flowmaster growl

            Excellent product... Excellent deep tone sound. Would purchase again.


            Year: 2018 Submodel: GT

            Helpful (9)

          • 5/5

            Installation Time: Afternoon

            October 05, 2018

            neighbors will love you

            first i installed an H pipe to the existing active valve exhaust. wanted to go a little louder and got this sounds amazing


            Year: 2018 Submodel: GT

            Helpful (17)

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