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

Item 404856
Market Price $1,352.99 You Save 12% ($157.04)
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$1,195.95 (each)

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    Features & Details

    • Aggressive Exhaust Tone
    • Enhanced Throttle Response, Power and Gas Mileage
    • 409 Stainless Steel Mandrel-Bent Tubing
    • Black Powder-Coated Mufflers
    • Scavenger X-Pipe
    • Four-Inch Carbon Fiber Quad Exhaust Tips
    • Easy Installation
    • Lifetime Limited Warranty
    • Fits All 2018-2020 Ford Mustang GT Models without Active Exhaust
    Most Aggressive Unit. Dyno-Tuned for maximum performance, the Flowmaster Outlaw Cat-Back Exhaust steals the show by producing a high-performance exhaust system that produces an aggressive tone inside and outside your Mustang's cabin. This racing-based exhaust system was designed for the true lovers of this exhaust sound and carries the stamp of being Flowmaster’s most aggressive sound unit.

    Loud Specs. The Flowmaster Outlaw series delivers a 3-inch cat-back exhaust system that produces an aggressive exhaust tone for an enhanced throttle response, power and gas mileage. The unit comes crafted from 409 stainless-steel, mandrel-bent tubing and features scavenger X-pipe and 4-inch carbon fiber quad exhaust tips.

    Installation. This exhaust system calls for an easy installation and includes all the necessary parts and hardware for a secure and lasting install.

    Warranty. Flowmaster, Inc. offers a lifetime limited warranty on this stainless-steel product against all manufacturing defects in materials and workmanship. Please refer to the manufacturer’s website for further information and details.

    Application. The Flowmaster Outlaw Cat-Back Exhaust is designed to fit all 2018-2020 Ford Mustang GT models without Active Exhaust.

    Fitment: 2018 2019 2020 Details

    MPN# 817808

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Scavenger Assembly
    • (1) Left Mid Pipe
    • (1) Right Mid Pipe
    • (1) Right Muffler Assembly
    • (1) Left Muffler Assembly
    • (4) Large Exhaust Clamps
    • (2) Small Exhaust Clamps
    Installation Info
    Will it fit my Mustang?

      Customer Photos (7) Submit Your Photo

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        Questions & Answers (1)

        1 Top Rated Question

        I love this exhaust, but I'm afraid it will be so loud that it would catch too much unwanted attention. So I guess my question is, is this loud or is it ear shattering annoyingly loud?

        • This will be a very loud and aggressive exhaust note. We would advise that when it comes to sound it is all personal preference and to check out additional sound clips on Youtube.

        Helpful (0)
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          Customer Reviews (8) Write a Review

          Overall Rating 4.4

          out of 5 stars

          Installation Time:Afternoon

          • Loudness / Volume 4.75 4.8
          • Exhaust Note 4.75 4.8
          • Fit & Finish 4.125 4.1
          • Bang For Your Buck 4.375 4.4

          • 5/5

            April 04, 2019

            Explosive sound

            Much more than I imagined. The original exhaust had great sound if you like the gentle roar of a kitten. Where the outlaw series gives that serengeti wild roar of a male lion ready to do battle. There is a slight drone at 1700 RPMs but you get used to it. Another thing I love is waking up my uptight neighbors with a cold start at 0500 in the morning. Gotta love it


            Year: 2018 Submodel: GT

            Helpful (2)

          • 2/5

            Installation Time: Weekend

            March 05, 2019

            Didn't fit right

            They sound amazing but since they didn't slide over the old pipes at all. Took about 2 days to get it right. Very much of a drone around 2000 rpm.


            Year: 2018 Submodel: GT

            Helpful (2)

          • 5/5

            Installation Time: Afternoon

            December 28, 2018


            The outlaw Cat-Back is what it is, outlaw. For those of you looking for "outlawish" sound, this is it. Stupid loud, great exhaust note, and fits like a glove. The best thing is you get a nice low growl on low RPM but that nice natural rasp of a 5.0 coyote in the upper range. There is Some drone around 2000 RPM on the highway but overall I recommend it to everyone who wants to be heard!


            Year: 2018 Submodel: GT

            Helpful (4)

          • 5/5

            Installation Time: Less than 1 Hour

            October 24, 2018

            Love it

            Oh my gosh!!! I love this exhaust system. You can hear me coming!!


            Year: 2018 Submodel: GT

            Helpful (8)

          • 4/5

            Installation Time: Afternoon

            August 22, 2018

            Amazing sound

            This product is fantastic simply said. The only thing keeping it from a 5 star review is that my exhaust came damaged. Maybe if American Muscle used a different shipping company. Other than that, I'm very satisfied. Also it need ed to be cut a few times before it fit properly.


            Year: 2018 Submodel: GT

            Helpful (7)

          • 4/5

            Installation Time: Less than 1 Hour

            August 21, 2018


            Very satisfied. A tip came out cracked, but other than that the installation was fast and it sounds amazing.


            Year: 2018 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            July 30, 2018

            Nice look with my black rims

            The sound is very throaty. I love the black carbon fiber look with the lightning blue mustang. This definitely looks awesome with the black out look I'm going for.


            Year: 2018 Submodel: GT

            Helpful (8)

          • 5/5

            Installation Time: Less than 1 Hour

            June 22, 2018

            Sounds great

            Instructions were clear and it sounds great couldnt ask for more


            Year: 2018 Submodel: GT

            Helpful (9)

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