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Roush Active Axle-Back Exhaust (18-19 GT w/o Active Exhaust)

Market Price $2,699.99 You Save 1% ($40.00)
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  • Item 404878

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    Features, Video & Details

    • ROUSH Active Axle-back Exhaust System
    • Select Between Touring, Sport, Track and Custom Exhaust Notes
    • Custom Programming with Included WiFi OBD2 Interface and Roush iOS App
    • Unique Open-Chambered Muffler Design
    • 304 Stainless Steel Construction
    • Full Mandrel-Bent Tubing
    • 4" Stainless Steel Quad Tips With Chrome Flashing
    • Cut & Clamp Installation
    • Fits 2018-2019 GT Mustangs Not Equipped with Factory Active Exhaust

    Review & Installation Video

    Review & Install Video

    ROUSH Active Exhaust System. Designed for use on 2018-2019 GT Mustangs that are not equipped with the factory Active Exhaust, this Roush Active Exhaust Axle-Back will let you take full control of the volume and performance of your S550 GT Mustang. Roush's proprietary Active Exhaust system ties directly into your Mustang's powertrain control module, opening and closing the mufflers valving based on throttle position.

    Four Distinct Exhaust Sounds. The ROUSH Active Exhaust System includes a center console mounted selector knob that allows you to easily switch between four different sound modes on the fly. Choose from Touring, Sport, Track, and Custom.

    Touring. The Touring mode closes the mufflers valves completely keeping the exhaust volume to an absolute minimum.

    Sport. The Sport mode keeps the exhaust quiet during normal driving conditions. Accelerator position and vehicle speed are used to determine valve position, opening up under acceleration for a more aggressive sounding ride.

    Track. The Track mode is wide-open. This mode keeps the exhaust tailpipe valves fully open at all times and doesn't restrict the raw sound of your Mustang. This mode is intended for track use and is not legal for street use.

    Custom. The Custom mode lets you create a custom sound map with the included WiFi OBD2 interface and ROUSH iOS application to personalize the exhaust sound to your own tastes. With the app you gain full control over the position of the valves based on vehicle speed, rpm and accelerator position. Download the free ROUSH Active Exhaust App for iOS - Here

    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 Active Axle-Back Exhaust System is designed to fit 2018-2019 GT Mustangs that are not equipped with the factory installed active exhaust.

    Fitment: 2018 2019 Details

    MPN# 422100

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Exhaust Pipe with Valve – LH
    • (1) Exhaust Pipe with Valve – RH
    • (1) Flashed Controller, Active Exhaust
    • (1) Vehicle Ready Wiring Harness 
    • (1) OBDII Active Exhaust Programmer
    • (1) Hardware Kit – Active Exhaust
    • (1) Switch, Mode Selector
    • (1) Switch Plate, Metal with Engraving
    • (1) Switch Bracket
    • (2) Bolt – M4 x 0.7 x 10
    • (2) Push Nut – 3/16” 
    • (3) Washer – M4 Nylon 
    • (7) Zip Tie with Edge Clip
    • (1) Knob, Knurled Style
    • (1) Set Screw – M3 x 0.5 x 6 
    • (1) J-Clip – M6  
    • (1) Bolt – M6 x 31 HEX
    • (2) Foam Tape 30 mm x 35 mm x 7.9 mm
    • (1) Micro Fuse – 10 AMP   
    • (20) Zip Tie – 7”  
    • (1) Multipurpose O-Ring, 5.6 mm
    Installation Info
    Will it fit my Mustang?

      Customer Photos

        Questions & Answers (2)

        2 Top Rated Questions

        Is this exhaust system CA emissions legal?

        • With California's new exhaust law, more than likely this will not be legal for use in the state.

        Helpful (0)

        I have an MBRP Cat-back with LTH's but need to neuter the sound for cold starts and being a good neighbor, would I be able to install this axle-back? What is the diameter of the piping?

        • You can install this axle-back exhaust with long tube headers. However, you may need to do some modification in order to get everything installed properly. This kit here would have 3-inch tubing.

        Helpful (0)
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          Customer Reviews (1) Write a Review

          Overall Rating 5

          out of 5 stars

          Installation Time:Shop Install

          Installation Cost:0-$100

          • Loudness / Volume 4 4
          • Exhaust Note 4 4
          • Fit & Finish 5 5
          • Bang For Your Buck 5 5

          • 5/5

            Installation Time: Shop Install

            Installation Cost: 0-$100

            June 29, 2018

            Totally Awesome Exhaust

            I had an opportunity to get a good deal on this Roush active exhaust from American Muscle. This exhaust sounds totally awesome. Much better than stock active exhaust. Wide open track mode is just muscle car all the way, not totally obnoxious but gets the point across in a big way!! Sport mode, great for every day cruise. Touring is very quite and great for neighborhood and Parking garage. All in all very happy with this exhaust and would recommend to anyone with stock exhaust that wants to have awesome sound with ability to tone it down when needed.


            Year: 2018 Submodel: GT

            Helpful (9)

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