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Flowmaster Pro Series Axle-Back Exhaust (11-12 GT, 11-12 GT500)

Item 18415
AmericanMuscle no longer carries the Flowmaster Pro Series Axle-Back Exhaust (11-12 GT, 11-12 GT500). Please check out 2015-2023 Mustang Axle-Back Exhaust & Mustang Ecoboost Exhaust for an updated selection.
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    Video Review & Installation

    Hey everyone I’m Justin with and I’m taking a look at Flowmaster’s Pro Series axle-back exhaust for your 2011 and up Mustang GT. The Pro Series designed to give you that classic Flowmaster sound yet it’s slightly less aggressive than some of their other options. The exhaust features Flowmaster’s perforated tube style mufflers, which exit through dual 4 inch polished tips. The install should only take you about an hour using standard hand tools. Now that’s take a listen to how Flowmaster’s Pro Series sounds compared to your factory exhaust.

    Product Information

    Features, Description, Q&A, Specs & Installation


    • Deep, Aggressive Flowmaster Sound
    • Increases Horsepower and Torque
    • Polished stainless steel 4" tips
    • Includes two Pro series mufflers
    • 409 stainless steel construction
    • 18lbs Lighter Than Stock
    • Fits 2011-2012 GT and 2011-2012 Shelby GT500 Mustangs


    Aggressive Flowmaster Sound. Give your 2011-2012 Mustang GT or GT500 that unmistakable Flowmaster sound with the Pro Series Axle-Back exhaust system. This system improves exhaust flow using Flowmaster's perforated tube style mufflers for that throaty, aggressive exhaust note your high powered Pony deserves.

    Increases Horsepower and Torque. This Flowmaster Pro Series Axle-Back exhaust system not only improves the sound of your Mustang, but with it's free flowing design it also improves throttle response and increases horsepower & torque.

    Quality Construction. Constructed from durable 3" 409 stainless steel tubing for its corrosion resistance, this Flowmaster axle-back features two Pro series mufflers with 4" diameter polished stainless steel tips that are embossed with the "Flowmaster" logo for true custom styling.

    Application. This Flowmaster Pro Series Axle-Back exhaust system is designed to fit the 2011-2012 5.0L Mustang GT and 2011-2012 5.4L Shelby Mustang GT500 for both great looks and great sound.

    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (2) Muffler assemblies
    • (2) Clamps

    Tech Specs

    Axle-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 3" Tip Size: 4"
    Muffler Type: Perforated Tube Fitment: 2011-2012 Mustang GT & GT500

    Questions & Answers

    10 More Questions

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