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Flowmaster Pro Series Axle-Back Exhaust (13-14 GT)

AmericanMuscle no longer carries the Flowmaster Pro Series Axle-Back Exhaust (13-14 GT). Please check out 2010-2014 Mustang Axle-Back Exhaust for an updated selection.
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AmericanMuscle no longer carries the Flowmaster Pro Series Axle-Back Exhaust (13-14 GT). Please check out 2010-2014 Mustang Axle-Back Exhaust for an updated selection.

Features, Video & Details

  • Deep, Aggressive Flowmaster Sound
  • Increases Horsepower and Torque
  • Polished Stainless Steel 4" Tips
  • Includes Two Pro Series Mufflers
  • 409 Stainless Steel Construction
  • Fits 2013-2014 GT Mustangs

Review & Installation Video

Review & Install Video

Hi I'm Justin with, and this is my breakdown of Flowmaster's Pro Series Axleback exhaust, fitting the 2013 Mustang GT. The Pro Series originated on the race track where the demand for a high performance free flowing muffler met strict decibel sound limits. The result is what we have here. A straight through muffler design allowing for maximum flow, but with a deep throaty tone and zero rasp. This exhaust features the two pro series mufflers, 3" tubing, and these large 4" brightly polished tips. Another nice thing with the Pro Series is that it's constructed entirely using quality 409 grade stainless steel. Getting this axleback bolted up to your 2013 is a very easy task that should only take you about an hour in the driveway using basic hand tools. Now let's hear how the Flowmaster Pro Series Axleback sounds compared to our factory exhaust.

Aggressive Flowmaster Sound. Give your Coyote Powered 2013-2014 GT 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 2013-2014 5.0L Mustang GT for both great looks and great sound. Does not fit GT500 models.
What's in the Box
  • (2) Muffler assemblies
  • (2) Clamps
Installation Info
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: 2013 Mustang GT

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Customer Reviews (14) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume 4.428571 4.4
  • Exhaust Note 4.928571 4.9
  • Fit & Finish 4.857143 4.9
  • Bang For Your Buck 4.785714 4.8

  • 5/5

    March 10, 2017

    Just right!

    I didn't want to be the guy with the obnoxiously loud car in the neighborhood, but I did want that classic muscle car growl. The Flowmaster Pro series delivers that. Beautiful sounding cold start, all the rumble I desire when I'm on the gas, and not overbearing when cruising during my daily commute. Perfect.


    Year: 2014 Submodel: GT

    Helpful (2)

  • 4/5

    Installation Time: Afternoon

    June 06, 2016

    sounds really great

    got the mufflers delivered really fast, went to install and the ends that were to attach to the pipes were bent very badly, the chrome tips were in protective boxes but not the other ends,took about an hour with a torch and a auto body dolly and hammer, this should not happen but I guess thats the way things are, outside of that the install was fast and simple and they sound great


    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    March 10, 2015

    Awesome sound!

    i was looking for an old-school rumble and these mufflers got me just that. i notice a lot of people turning around to see whats coming as im driving through town or a parking lot. Lots of thumbs up!! Fitment was great and install was easy. Did the install by myself in an hour using a jack and jack stands. The tips look much better than stock now that the cut-out in the bumper is filled up a little more.


    Year: 2014 Submodel: GT Kinston, NC

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    July 03, 2014

    Axleback Pro Series Exhaust

    This is a great product. I changed out the mufflers on the garage floor, with little room to work under the car and the whole process took about 2 hours. When I finished I fired up the Mustang and the change in sound was dramatic, the sound was now deep and throaty and the burble was there in the exhaust note. Great product and I would recommend it to anyone. My Mustang now sounds like a car that has the 420 horsepower that the 5.0 came with.


    Year: 2014 Submodel: GT Waterloo, IL, USA

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    May 14, 2014

    Flowmaster Pro Series Axle-Back Exhaust (13-14)

    This Flowmaster Pro Series was exactly what I was looking for. The most deep throaty tone without all the snap, crackle and pop that you hear with some exhaust systems. I gotta tell you that it's such a serious improvement! It now sounds more like an AC Cobra 427 Roadster. Side - pipe exhaust note! The product was easy to install. Only thing missing in the instructions would be to cut the spot welds on the original factory clamps. The shorter chrome tips also gives a cleaner look overall. I would recommend this product to any Coyote owner. As always, thank you for the best products and great service and fast, free shipping.


    Year: 2014 Submodel: GT Emmaus, PA

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    April 19, 2014

    Great sound

    Although it wasn't a choice, this took 1.5 hours to install and was pretty easy. The car sounds like a muscle car now and was easily the first choice in upgrades since the stock mufflers are no loader than my to the power upgrades!


    Year: 2014 Submodel: GT IL

    Helpful (2)

  • 4/5

    Installation Time: Afternoon

    December 19, 2013

    Lot's of compliments

    They sound exactly how I want them except between about 2000-2200 rpm. I assume 6th shift on my automatic trans. This is about 73-79 MPH. Really loud in the cabin. Bump it up to 80+ and she quiets back down. It's been years since I've run performance exhaust and maybe how to drive them. But that's why bought her to drive and enjoy. Other than that steady window, these axle backs sound great!


    Year: 2014 Submodel: GT central Texas

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    November 02, 2013

    great sound

    me and a friend installed in 50 min.the sound is just what i was hoping for,not to loud and not to soft.if your looking for a mid range sound the pro series is the one to get


    Year: 2014 Submodel: GT new castle pa.

    Helpful (3)

  • 5/5

    Installation Time: Less than 1 Hour

    September 26, 2013

    Perfect sound for a muscle car

    I was really disappointed in the factory exhaust note on my new 2014 Mustang GT so I started searching. I am very particular on my upgrades and after a full evening of sound bites ( and an annoyed wife) I found the perfect fit with the flowmaster pro axle backs. I purchased, received them quickly, and installed in about an hour. The installation went very easily, the only problem being keeping the pipes up out of the way while removing the factory mufflers (the guy with the 2x4 idea had it right). It sounds perfect, just like a muscle car should. I was a little afraid it would be to loud but flowmaster nailed it. I wouldn't change them a bit.


    Year: 2014 Submodel: GT Sarcoxie, MO

    Helpful (2)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    September 06, 2013

    You know when I'm coming

    This was perfect for me, The flowmasters are loud and deep sounding and shake your feet. Let my shop guy install this one, even thought it looked like a fun time


    Year: 2014 Submodel: GT Pa

    Helpful (2)

  • 5/5

    Installation Time: Less than 1 Hour

    June 12, 2013

    Deep Muscle Car Sound - Look no further....

    These Flowmaster Pro series mufflers have the perfect deep sound that a Mustang should have and it's not to loud either and with NO popping backfire like others mufflers have. I like that the mufflers have a straight through design to allow for better exhaust flow. Plus, they feature something Flowmaster calls "Laminar Flow" probably a marketing gimmick - but these Pro series mufflers are awesome. I still have the factory H pipe and resonators.


    Year: 2014 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    June 01, 2013

    great sound

    this was exactly what I was looking for not to loud not to quite with a deep aggressive sound.


    Year: 2014 Submodel: GT minneapolis MN

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    April 20, 2013

    Good bang for the buck

    Installed them in my driveway and finished in about two hours. I love the sound, but they were a little louder than I expected. They are still within an acceptable noise range for a DD. So far I'm loving this axel back and recommend it to anyone looking for something easy on the wallet, with a balance between quiet, and a good aggressive tone.


    Year: 2013 Submodel: GT Anderson, SC, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    January 29, 2013

    Awsome sounding..

    A little more aggressive sound, than i thought it would be.... But, it grows on you... Have gotten quite a few compliments so far...


    Year: 2013 Submodel: GT Bradenton, FL, USA

    Helpful (2)

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