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MAC Boom Tube Axle-Back Exhaust (15-17 V6 Fastback)

Market Price $613.54 You Save 12% ($70.59)
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$542.95 (pair)

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  • Item 389972B

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    Features & Details

    • Loud Throaty Exhaust Note
    • Resonator Tips
    • Muffler Delete Design
    • Mandrel-Bent 304 Steel Construction
    • 4" Polished Stainless Tips
    • Fits 2015-2017 V6 Fastback Mustangs
    "The Boom Tube". Uncork the exhaust of your V6 S550 Fastback Mustang with a MAC Boom Tube Axle-Back Exhaust. This MAC Performance Axle-Back System eliminates the restrictive factory mufflers to reduce back pressure for an increase in both power and sound.

    Resonator Tips. Often imitated but never duplicated, the MAC Boom Tube Axle-back Exhaust uses uniquely designed dual wall resonator tips that feature perforated baffles to provide a loud throaty exhaust note without the irritating popping of the imitators.

    Durable Steel Construction. Constructed from 2.5" diameter mandrel-bent 304 stainless steel tubing, the Boom Tube axle-back system features polished 4" angle cut stainless steel dual wall tips for impressive muscle car styling 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 "Boom Tube" Axle-Back exhaust system is designed to fit both 2015-2017 V6 Fastback Mustangs. Not compatible with convertible models.

    Please Note. MAC Performance does not make any claims that their Boom Tube exhaust will meet any federal or local noise regulations or laws. Please check your local and state ordnances for installation and usage regulations.

    Fitment: 2015 2016 2017 Details

    MPN# BT3715

    CA Residents: WARNING: Cancer and Reproductive Harm -

    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 V6
    Muffler Type: Straight Through / Resonator Fastback or Convertible: Fastback
    Will it fit my Mustang?

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    Questions & Answers (7)

    5 Top Rated Questions

    Hi, Will this fit on a convertible if I only use the axle-back portion of the exhaust that includes the tips and not the back pipes?

    • Unfortunately this exhaust will not fit convertible models due to the different bracing. Only EcoBoost fastback models

    Helpful (0)

    From this exhaust system VS Borla cat back ATAK which one is louder

    • The MAC Boom Tube Axle-Back Exhaust and the Borla ATAK Cat-Back Exhaust, item # 387468, ( are both very loud and throating exhaust systems. The ATAK is going to be a bit more aggressive compared to the MAC system.

    Helpful (0)

    Can I get these with black tips for my V6, I see the GT has a black tip version, but there isnt one for the V6. Would the GT model fit my V6?

    • It does not look like we offer a version of the MAC Boom Tube Axle-Back with black tips. This looks to be the only version we have available for the V6.

    Helpful (0)

    Because this muffler has a muffler delete design, would I lose pressure in the back as if I had a muffler delete or it won't affect the pressure?

    • It's possible that you will lose back pressure, however every Mustang reacts differently in terms of back pressure when changing/modifying exhaust. Unfortunately there isn't a formula to follow when it comes to back pressure and exhaust, which means you may gain a little power, lose a little power, or notice nothing at all, and the only way to find out is to install it.

    Helpful (0)

    In the Fitment Section it states "Fits Fastback Models Only" Will this NOT fit a 2015 convertible EcoBoost? If not, why?

    • The reason that this will not fit the convertible EcoBoost models is because of the way that the frame of the vehicle is designed.

    Helpful (0)
    Post Your Question
    2 More Questions
    Would this connect to BBK X pipe 1 answer
    Would this connect directly to a 2.5" x or h pipe? 1 answer

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    Customer Reviews (4) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Weekend

    Installation Cost:0-$100

    • Loudness / Volume 4 4
    • Exhaust Note 4.75 4.8
    • Fit & Finish 4.25 4.3
    • Bang For Your Buck 4 4

    • 4/5

      Installation Time: Less than 1 Hour

      February 04, 2018

      Review from MAC Boom Tube Axle-Back Exhaust (15-19 EcoBoost Fastback w/o Active Exhaust)


      I love the sound. Not as loud as I thought it would be but still gives a great tone. The clamps are worthless and has to be modified a bit to sit right.


      Year: 2016 Submodel: EcoBoost

      Helpful (12)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 21, 2017

      Worth the money

      LOUD sounds very good well worth the money only took shop half hour to put on and they also look nice.


      Year: 2016 Submodel: V6

      Helpful (11)

    • 5/5

      November 20, 2016


      These are a muffle delete so they will be loud. But a hot loud! Sound nice! Wow I can't believe how nice these sound! Drone is very very low!


      Year: 2017 Submodel: V6

      Helpful (12)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      October 05, 2016

      Review from MAC Boom Tube Axle-Back Exhaust (15-19 EcoBoost Fastback w/o Active Exhaust)

      Straight Piped Sound.

      It is an over all good exhaust, it does sound a little funny on a cold start but after warming up you can love that nice turbo hum. Also like when you speed up you can hear the air being forced out the exhaust kind of resembling the sound of a turbo on a diesel truck.


      Year: 2016 Submodel: Ecoboost

      Helpful (12)

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