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MAC Axle-Back Exhaust (15-19 EcoBoost Fastback w/o Active Exhaust)

Market Price $718.63 You Save 12% ($82.68)
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$635.95 (pair)

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  • Item 389971A
  • MPN# TK3715

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Ship to: Ashburn - 20149
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    Features & Details

    • Aggressive Muscle Car Sound
    • Improves Exhaust Flow for More Power
    • Stainless Steel Construction
    • 4" Polished Stainless Steel Tips
    • "Flow Path" Chambered Mufflers
    • Not Compatible with Active Exhaust
    • Fits 2015-2019 EcoBoost Fastback Mustangs
    Improve Performance and Sound. A MAC Performance Axle-back Exhaust System will add a throaty muscular exhaust note to your EcoBoost powered S550 Fastback Mustang and improve it's performance at the same time. By reducing back pressure with a free-flowing exhaust, you will see rear wheel gains in both horsepower and torque.

    Flow Path Mufflers. MAC Flow Path Chambered Mufflers feature a patented multi passage design, following Helmholtz's Theory of Tone, to produce a muffler that effectively flows exiting exhaust gases all while maintaining a desirable tone. With no packing that can burn out, Flow Path Mufflers will sound the same mile after mile, year after year.

    High Quality Construction. Constructed from mandrel bent stainless steel tubing for superior strength and corrosion resistance, this MAC Performance Axle-back Exhaust features two "Flow Path" chambered mufflers that end with massive 4" diameter polished stainless steel slant cut exhaust tips for impressive muscle car looks and sound.

    Cut & Clamp Installation. The installation of this Axle-Back Exhaust system will require cutting and removing the factory muffler assemblies and clamping the new muffler assemblies in place. Clamps and instructions are provided.

    Application. This MAC Axle-Back exhaust system is designed to fit the 2015-2019 EcoBoost Fastback Mustangs without the Active Valve Exhaust. Not compatible with convertible models.

    Fitment: 2015 2016 2017 2018 2019 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (1) Right muffler assembly
    • (1) Left muffler assembly
    • (1) Right tailpipe assembly
    • (1) Left tailpipe assembly
    • (4) Clamps
    Installation Info
    Tech Specs
    Axle-back Exhaust Specifications
    Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
    Tip Size: 4" Fitment: 2015-2017 EcoBoost
    Muffler Type: Chambered Muffler Fastback or Convertible: Fastback
    Will it fit my Mustang?

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    Customer Reviews (3) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 3.666667 3.7
    • Exhaust Note 5 5
    • Fit & Finish 4 4
    • Bang For Your Buck 5 5

    • 5/5

      Installation Time: Afternoon

      June 01, 2017

      Great sound

      The review video is correct about the clamps not being very good. They aren't the right size for the pipe off the resonator. The sound is amazing though and I would say louder than what you would think.


      Year: 2017 Submodel: EcoBoost

      Helpful (3)

    • 4/5

      Installation Time: Afternoon

      May 06, 2017

      MAC Axle Back Exhaust

      Great service by American Muscle in partnership with iParcel. The exhaust arrived at my door in the UK in less than a week and was fitted on the Saturday morning on my driveway. Sounds as good as you'll get for the Ecoboost with a nice deep tone and burble at tickover. Just right as I was after more of a muscle sound than raspy boy racer. Fit was easy once the old pipes were cut. I used a grinder with metal cutting disc to cut most of the way, but managed to leave the heat shields in tact by cutting the old clips first and bending the heat shields up then finishing off with a hack saw blade with handle. The heat shields were clamped back dwn to the new pipes with new jubilee clips. I found that the new to existing joint rotated due to weight of the back boxes, but a couple of stainless self-tappers screwed into the joints solved this. Maybe stronger clamps are required? Wouldn't have been a problem if the new pipes connected after the bend in the back box, but this is really a resonator back system, not an axle back! Also, the right hand back box hanger needed bending slightly so that the tip exited central through the valance cut out. Left side was spot on. Overall, I'm well pleased! Sounds great! Oh, the tips are a bit plain as don't have a roll. I've added a couple of slash cut stainless tips with rolled ends,


      Year: 2017 Submodel: EcoBoost

      Helpful (5)

    • 5/5

      November 20, 2016

      Review from MAC Axle-Back Exhaust (15-17 V6 Fastback)

      MAC has awesome exhaust!

      People don't like MAC but these are a different story. Holy man. These sound so awesome and everyone tells me how nice they sound!


      Year: 2015 Submodel: V6

      Helpful (4)

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