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Roush Square Tip Axle-Back Exhaust (11-12 V6)

AmericanMuscle no longer carries the Roush Square Tip Axle-Back Exhaust (11-12 V6). Please check out 2010-2014 Mustang Axle-Back Exhaust for an updated selection.

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 V6 Mustangs
Aggressive Muscle Car Sound. Let everyone know your V6 Pony has arrived with the aggressive sound of this high performance 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 V6 Mustangs with the Roush Rear Valance installed.

Fitment: 2011 2012 Details

MPN# 421144

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: 2-1/2" Tip Size: -
Muffler Type: Chambered Fitment: 2011-2012 V6 Mustangs
Will it fit my Mustang?

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      Questions & Answers (4)

      4 Top Rated Questions

      If i want to switch over to a square tip exhaust like this, the only thing I'll need to change to make it fit is the rear valence correct?

      • That's correct! All you would need to install the Roush Square Tip Axle-Back Exhaust on a 11-12 V6 is the Roush Rear Valance installed.

      Helpful (0)

      Can I use this Roush Square tip axle exhaust on my v6 and use my own tips,and make it fit in hole on stock valance?

      • The Roush Square Tip Axle-Back Exhaust is designed for use of their valence, however, as long as your tips are the correct size, and in the correct location, your own exhaust tips could fit, however, that would be a custom installation at that point.

      Helpful (0)

      HP? Will these add more hp to my v6? If so how much ?

      • Yes they will but not much cat back exhaust Wil offer more horse power then just an axle back

      Helpful (0) Show 1 more answer

      square tips with stock valence will this fit with the stock rear valence? really prefer the square design, but cant afford the roush valence at this time

      • Will not fit with stock valance because the square tips dont come straight out like the round one do. Kinda diagonal but you can cut to fit but I dont recommend it

      Helpful (0) Show 2 more answers
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        Customer Reviews (8) Write a Review

        Overall Rating 4.8

        out of 5 stars

        Installation Time:Full Day

        Installation Cost:$100-$250

        • Loudness / Volume 4.625 4.6
        • Exhaust Note 4.5 4.5
        • Fit & Finish 4.875 4.9
        • Bang For Your Buck 4.5 4.5

        • 5/5

          Installation Time: Afternoon

          August 27, 2015

          Great Roar

          The Roush square tip axle back exhaust creates the perfect amount of loudness when accelerating and delivers such a great roar and rumble when starting up it will give you chills. The square tips gives your stang a much more aggressive look along with the Roush square tip rear valence. Great buy and I highly recommend.


          Year: 2012 Submodel: V6 Orlando, FL

          Helpful (10)

        • 5/5

          Installation Time: Less than 1 Hour

          July 23, 2014

          Great sound

          The exhaust went on very easy and I love the sound. They are not to loud.


          Year: 2011 Submodel: V6 Ocala, FL, USA

          Helpful (9)

        • 5/5

          Installation Time: Less than 1 Hour

          March 21, 2014

          incredible change for a v6

          I couldn't stand having a mustang and not having a roar when I turned on my car. Ever since I put my new exhaust on. I'm gonna keep it. Plus really sets off my dub edition considering it already had some equipment from rousch. Can't wait to keep adding on to my mustang! Appreciate everything americanmuscle does for the mustang community.


          Year: 2012 Submodel: V6 Leonardtown, MD 20650, USA

          Helpful (8)

        • 5/5

          Installation Time: Shop Install

          Installation Cost: $100-$250

          May 17, 2013

          Best Exhaust for a V6!!!

          Bought this for my 2011 V6 premium mustang, it has a nice deep sound. Everyone who has heard it loves it! had flowmasters before this the its like night and day.. wow everyone that hears it cant believe it a V6.. thanks American Muscle


          Year: 2011 Submodel: V6 Dallas, TX, USA

          Helpful (10)

        • 4/5

          Installation Time: Shop Install

          Installation Cost: $100-$250

          February 03, 2013

          Nice upgrade from stock

          My Mustang sounded really good, not too loud and not too soft. The exhaust note could have been a little deeper though. I turned a lot of heads after I had it installed, and got a lot of compliments. It got atleast 2-3 more mpg. There was a bit of drone, but it didn't bother me much...if I wanted something quiet I would have gotten a prius.


          Year: 2013 Submodel: V6 TN

          Helpful (9)

        • 5/5

          Installation Time: Afternoon

          January 30, 2013

          Great deep sound and the tips look amazing

          I installed these with someone else but can be done with one person. I have zero knowledge when it comes to installing parts and this was extremely easy to do! The hardest part is putting the axleback and connecting them to the tubes. First time I started my car, my heart probably skipped a beat with happiness haha, there is no drone except from 60-62 mph and then it's gone, driving around town is completely fine and deep but after 3k they start to scream in a good way. Expect pops and gurgles and depending on the tune they will do it more. I drive on the interstate often and with 3:31 gears going 85 mph they don't sound overpowering or bad at all, barely turn up some music and theyre completely gone.


          Year: 2013 Submodel: V6 Clearwater, FL, USA

          Helpful (9)

        • 4/5

          Installation Time: Shop Install

          Installation Cost: $100-$250

          August 30, 2012

          V6 or V8

          These exhaust have really helped me stand out from the rest of the v6 heard. I really love the deep gurgle sound from this exhaust. I have noticed gains in horsepower and gas mileage. I also have the Airaid intake and they work well together. I would suggest that you get a tune after the install because I have noticed a small lag time when I really hit the gas but nothing major. It only took the shop that installed them about an hour and cost me $158 because I also have the Roush rear valance...... People who dont know alot about stangs wont even believe its a V6 after you install these bad boys.


          Year: 2012 Submodel: V6 Rocky Mt, NC, USA

          Helpful (9)

        • 5/5

          Installation Time: Afternoon

          June 05, 2012

          Oh they're definitely loud enough...

          Put the full Roush exhaust system on including the valence and it came out looking great! Install did not take very long as it used stock hangers and mounts. Can really be heard between 2-4k rpm in 2nd and 3rd. More road noise than expected and makes a long cruise kind of mind numbing if you don't have the radio up. Overall a great buy!


          Year: 2012 Submodel: V6 Oklahoma City OK

          Helpful (9)

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