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Roush Square Tip Axle-Back Exhaust (11-12 GT)

AmericanMuscle no longer carries the Roush Square Tip Axle-Back Exhaust (11-12 GT). Please check out 2010-2014 Mustang Axle-Back Exhaust for an updated selection.
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Features & Details

  • Aggressive Exhaust Sound
  • Unique Open-Chambered Muffler Design
  • 409 Stainless Steel Tubing
  • 304 Stainless Steel Square Tips with Chrome Flashing
  • Fits 2011-2012 GT Mustangs
Aggressive Muscle Car Sound. Let your engine howl with a Roush Axle-Back Exhaust. This innovative new Roush exhaust system features a hollow chamber muffler that results in increased air flow, and a unique sound, with no in-cabin "boom" normally found with performance exhaust at cruising speeds.

Quality Roush Construction. Constructed from 409 stainless steel for a durable long life, the Roush axle-back exhaust system features two unique chambered mufflers with square shaped 304 stainless steel tips. The square tips are finished with a new chrome flashing process that is resistant to discoloration due to exhaust heat.

Application. This Roush Performance Axle-Back exhaust system with square exhaust tips is designed to fit the 2011-2012 GT Mustangs with the Roush Rear Valance installed.

Fitment: 2011 2012 Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (2) Muffler assemblies
  • (2) Square Tips
  • (4) Clamps
Installation Info
Tech Specs
Axle-Back Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : 304 Stainless Steel with Chrome Flashing
Piping Size: 2.75" Tip Size: -
Muffler Type: Chambered Fitment: 2011-2012 GT Mustangs
Will it fit my Mustang?

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Questions & Answers (1)

1 Top Rated Question

roush axel back exhaust do you need to buy vallance?

  • I just installed these on my car last night (2011 GT) with the GT stock valance. The square tips do not touch the stock GT valance at all HOWEVER, beware that the square tips (which can easily be switched with round tips if you like) look pretty stupid on the stock GT valance. If you want that square exhaust look, get the Roush Valance.

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Customer Reviews (7) Write a Review

Overall Rating 5

out of 5 stars

Installation Time:Afternoon

  • Loudness / Volume 5 5
  • Exhaust Note 5 5
  • Fit & Finish 4.714286 4.7
  • Bang For Your Buck 4.857143 4.9

  • 5/5

    Installation Time: Less than 1 Hour

    February 28, 2016

    Awesome Sound!!!

    First time installing an axel back. Only took about 2 hours as I had a problem with the the factory part. Should only take about an hour. But once I got the factory off it took no time at all and all parts were supplied. Excellent sound and worth every penny!!!


    Year: 2011 Submodel: Other

    Helpful (7)

  • 5/5

    Installation Time: Afternoon

    January 11, 2015

    Best exhaust in my opinion.

    I was looking for an exhaust that was quiet at cruising speeds and loud at WOT. This axle back delivered perfectly. There is no drone or in cockpit boom. It can be loud during the first 10-15 seconds of cold start but after that it really mellows out. Has a nice rumble to it however it has more of a rasp than deep tone when punching it. It took me months to decide on an exhaust and I'm glad I chose this one. I get nothing but compliments and head turns every where I go. To give you the best idea of noise, its definitely louder than a Flowmaster, but quieter than a Magnaflow.


    Year: 2012 Submodel: GT Anthem, Phoenix, AZ, USA

    Helpful (8)

  • 5/5

    Installation Time: Less than 1 Hour

    October 20, 2014

    Great Muscle Car Sound

    These mufflers give you the muscle car sound without the rasp like a lot of other mufflers. At low rpms they sound pretty qhurt like when your cruising but as soon as you get on it they're really loud and sound fantastic. The square tips look fantastic as well. I would definitely recommend them.


    Year: 2011 Submodel: GT

    Helpful (7)

  • 5/5

    Installation Time: Shop Install

    November 15, 2013

    Perfect Sound for a 5.0

    This came factory on my stage 2 Roush. There is no better sound for the new 5.0. Can be a little harsh for the neighbors on a cold morning, but oh well, you obviously are leaving anyway :) After the pipes warm up, it is actually very mellow at idle and has a kind of bubble to it. Doesn't take much throttle at all to let people know whats going on under the hood though, and I wouldn't have it any other way. I will have to try to get a good video for you all.


    Year: 2011 Submodel: GT South NJ

    Helpful (7)

  • 5/5

    Installation Time: Afternoon

    November 08, 2012

    Awesome Sound Easy install!

    The exhaust arrived very well packaged. It didn't take me long to install the exhaust, all i had to do was unbolt the stock axle back as well as the hangers and bolt on everything with the Roush Exhaust and I was done! The fitment was fine you just need to make sure the tips match with the shape of the bumper when you are installing it. The difference in tone and loudness is huge! (in a good way) The one thing i do like is when you are idling low it is a little quiet but once you start to accelerate it wakes up!


    Year: 2012 Submodel: GT Albuquerque, NM

    Helpful (8)

  • 5/5

    Installation Time: Less than 1 Hour

    September 16, 2012

    Great Sounding Exhaust and Quiet When You Want it to Be

    This exhaust sounds amazing for only being an axle back. Nice and quiet while at cruising speeds or through the neighborhood but comes to life when you put the hammer down. After about 6 months or so there is some rust near the welds/seams of the muffler portion. Mine came on my 2011 Roush Mustang but I have installed another Roush axle back on a friends 2012 and install was a piece of cake.


    Year: 2011 Submodel: GT Orlando, FL

    Helpful (7)

  • 5/5

    Installation Time: Less than 1 Hour

    April 01, 2012


    The whole kit came well packaged and all parts protected in a plastic cover or foam. The instructions were a little hard to read due to a copy of many copies. I would suggest to download the pdf version off of Roush Performance website. The removal and installation took about and hour. The installation was staight foward. Make sure you have a lot of break free avalible (THIS IS A MUST). The first time startiing her up she sounded AMAZING. I did notice that at idle it would fluctuate randomly. NOTE: The ECM needs to be reset and it needs to re-learn how to idle. See forums and owners manual. The sound from the Roush exhaust is amazing!!!! The noise in the cabin increases but this make your MUSTANG sound like a TRUE MUSCLE CAR!!! I can deal with that any day!


    Year: 2011 Submodel: Other Temecula, CA, USA

    Helpful (9)

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