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

Market Price $1,107.99 You Save 12% ($128.04)
Our Price

$979.95 (kit)

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  • Item 404840-B

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    Features & Details

    • Axle-Back Exhaust
    • Get the Tone and Power Your Mustang Needs
    • 409S Stainless Steel Construction
    • Dyno-Tuned
    • Three-Inch Mandrel-Bent Pipes
    • Four-Inch Polished Stainless Steel Tips
    • Super Aggressive Sound
    • Easy Installation
    • Lifetime Limited Warranty
    • Fits 2018-2020 Ford Mustang GT with Active Exhaust
    Business in the Front, Party in the (Axle) Back. Your 2018-2020 Ford Mustang GT is a beast on the track, and when you’ve got something that good, aftermarket modifications from the best names out there are going to make it even better. So equip with the Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips and feel the power and hear the sound as you hit the gas.

    Built to Last. These pipes are forged from super-sturdy 409 stainless steel pipe, which is mandrel-bent and dyno-tuned for maximum performance increases, even from its axle-back configuration. Its an efficient, straight-through build that is going to sound great and look great on the back of your Mustang as well.

    Stylish Looks. The powerful 4-inch stainless tips are brought to a brilliant shine. They provide the signature outlaw sound that Flowmaster is known for.

    Installation. You will need moderate mechanical expertise to put this Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips in correctly. Please make sure you have hand tools and either a car lift or jack stands to put this in. Allow about 4 hours for proper install. Please have this installed professionally if you lack the experience or tools.

    Limited Lifetime Warranty. This axle-back kit 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# 817825

    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?

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        Questions & Answers (1)

        1 Top Rated Question

        Does this keep the active exhaust functionality? Is quiet still quiet?

        • The does retain the active exhaust function. The closed ("quiet") setting will be louder compared to stock.

        Helpful (0)
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          Customer Reviews (2) Write a Review

          Overall Rating 5

          out of 5 stars

          Installation Time:Full Day

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

          • 5/5

            Installation Time: Shop Install

            January 07, 2019

            Head Turner!

            This product makes my mustang sound waaaay more agressive! Also, I have the flowmaster scaverger x pipe resonator delete on it. Best purchase I ever made! The sound is deep and raspy! Very little drone. Turns heads eveywhere I go!


            Year: 2018 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            January 03, 2019

            Holy Loud Batman!

            Bought these to replace the factory active exhaust and let me tell you they are LOUD! Sound really good, slight drone at 2k RPM but other than that they are a great bang for the buck!


            Year: 2018 Submodel: GT

            Helpful (8)

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