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Kooks Performance Axle-Back Exhaust (11-14 GT)

Market Price $696.46 You Save 10% ($69.64)


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  • Item 65513
  • MPN# 11406600

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Features, Video & Details

  • Aggressive Muscle Car Exhaust Note
  • 3" Oval Race Mufflers
  • Direct OEM Replacement Upgrade
  • 2-3/4" to 3" Stainless Steel Tubing
  • 4" Polished T304 Stainless Steel Tips
  • Fits 2011-2014 GT Mustangs

Review & Installation Video

Review & Install Video

Aggressive Exhaust Note. Give your 5.0 Coyote powered Mustang the loud aggressive exhaust note of a classic 60's muscle car with a Kooks Performance Axle-Back Exhaust system, that features stainless steel race mufflers.

Durable Stainless Steel Construction. Constructed from 2-3/4" to 3" diameter stainless steel tubing for strength and corrosion resistance, this Kooks Performance Axle-Back exhaust system features two high flow 3" Oval Race Mufflers that end with 4" polished T304 stainless steel slant cut exhaust tips.

Application. This Kooks Performance Axle-Back Exhaust Kit is specifically designed to fit the 2011-2014 GT Mustangs with the Coyote 5.0L 4 Valve V8 engine.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • (2) Axle-Back Muffler assemblies
Installation Info
Tech Specs
Axle-Back Exhaust Specifications
Piping Material: Stainless Steel Tip Material : Polished 304 Stainless Steel
Piping Size: 2-3/4" to 3" Tip Size: 4"
Muffler Type: Race Muffler Fitment: 2011-2014 GT Mustangs
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • GT - 11, 12, 13, 14

Most Helpful Reviews

KICKS #%@!!!!!

Sound is just right, Fitment and Quality is phenomonal! 0 DRONE! Makes me want a pair on my wifes FLEX!

Helpful (4)

Good and Bad....

Installed this axe-back on my '12 GT. Sounds great at start up, very deep! When revving lightly(1-2K) before taking off, it sounds great! There is a nice rumble and deep tone! Deceleration also sounds ...

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Helpful (4)

Overall Rating 4.8 out of 5 stars
Read All 16 Reviews

Customer Photos (6) Submit Your Photo

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3 Questions / 5 Answers

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Stuck between two choices. I like these and the flowmaster outlaws. I like these looks better, but sound is more important to me than looks. The outlaws sound deeper than these just from online searches I mean. Anyone here familiar with both. I like loyd but not obnoxious. But I'm afraid this are more high pitch then deep. Can you help me out please. Thanks


  • Although I've never owned the Outlaws, I have had the Hushpowers, which is considerably quieter. That being said, I personally feel that the Outlaws would be too loud for a daily driver unless that's what you like - LOUD - all the time.The Hushpowers had a sort of deep tone, yet not near as deep in my opinion as the Kooks. I really didn't like the glasspack-type sound that the Hushpowers produced off-idle and above. They were very bubbly sounding to me. Not so with the Kooks system, just real muscle car sound. I believe the Outlaws, being a smaller muffler, would have to be much louder and tend to sound even more glasspack-like - popping, etc. Hope this helps!


    Good Answer (3) (0)

Show 2 more answers Question Resolved

Anyone know the HP increase with the Kooks exhaust? Just installed...LOVE the old school sound, deep idle w/o being obnoxiously loud. Great fit and finish. These must increase HP...just wondering by how much.


  • No Hp gains from axle backs unless you have done a ton of supporting mods, even then is extremely small. maybe 1-2hp at the most.


    Good Answer (0) (0)

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I am interested in purchasing an axel-back exhaust system for my 2014 GT 5.0. I want a deep throat guttural sound when idling and traveling at normal speeds. I don't race it and I don't want any pops or back fires. Is Kooks Performance Axle-Back Exhaust the best system to purchase?


  • Kooks Exhaust systems are designed to give you a deep throaty muscle car tone. This system gives you a terrific mix of agrressiveness and performance.

    Kooks Headers

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Customer Reviews (16) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume 4.4375 4.4
  • Exhaust Note 4.9375 4.9
  • Fit & Finish 4.9375 4.9
  • Bang For Your Buck 4.5625 4.6

  • 5/5

    Installation Time: Less than 1 Hour

    May 09, 2012

    KICKS #%@!!!!!

    Sound is just right, Fitment and Quality is phenomonal! 0 DRONE! Makes me want a pair on my wifes FLEX!


    Year: 2012 Submodel: GT Detroit

    Helpful (4) (0)

  • 3/5

    Installation Time: Less than 1 Hour

    September 07, 2012

    Good and Bad....

    Installed this axe-back on my '12 GT. Sounds great at start up, very deep! When revving lightly(1-2K) before taking off, it sounds great! There is a nice rumble and deep tone! Deceleration also sounds awesome! My only complaint is at WOT, the sound seems to noticeably drown out. If WOT was louder, it would be the perfect exhaust! Looks like I'm going to switch to the Flowmaster Outlaw.


    Year: 2012 Submodel: GT

    Helpful (4) (2)

  • 5/5

    Installation Time: Afternoon

    December 01, 2014

    Kooks is where it is at.

    I am the person who does hours of research, watches tons of youtube videos and looks at tons of reviews. I also talked to the American Muscle live chat employees to help me as well. I want it all, i want no drone and good sound, less weight and good looking products. I was going to get either Borla or Corsa because I heard they have no drone and that is why they have the price point that they do. however a live chat employee told me that the Kooks brand would give me the same sound and no drone for a fraction of the price. I decided to trust his advice and I am certainly glad that I did it should definitely sound like this from the factory. I'm very happy with the quality,the finish, the look and the sound that this system makes. Of course there is sound when you press the gas but driving on the highway is quiet. I would buy again.


    Year: 2014 Submodel: GT Arizona, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    October 06, 2013

    Kook's on a Boss Laguna

    Added the Kook's axle back to my '13 BOss LS. Install was simple and direct, there are a few helpful hints on the web such as to pull the mid-pipes to help and/or drop the hangers. I had to do both on the Driver's side, but still simple. Sound is WAY deep and throaty, but I added for the ~29#'s weight savings and a bit more open exhaust so I could delete the Boss side pipes...a bit high school those side pipes for me. WIth side pipes pulled saved 40#'s or more. For those of potential concern...I do track my car and go to Laguna Seca on 90db days. I was VERY concerned this might be an issue, but it passed no problem.


    Year: 2013 Submodel: Boss California, USA

    Helpful (1) (0)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    September 04, 2013

    Nice compromise

    Initially purchased Flowmaster Outlaws and they sounded awesome, but embarrassingly loud. AM was helpful in recommending the Kooks. Beautifully crafted. Felt lazy after I installed the outlaws so I went to Midas and they did a fine job. Best feature is the rumble at idle, otherwise pretty tame but satisfying. The kooks look much better then the outlaws, IMHO.


    Year: 2013 Submodel: GT Massachusetts, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    January 18, 2013

    Exceptional quality

    I have always heard KOOKS products were very good, and I was not disappointed at all with this axle-back. Very high quality and I could not ask for a better fit and finish. Its not the loudest axle-back out there, but it is perfect if you have plans to remove the factory resonators, or install an offroad midpipe.


    Year: 2013 Submodel: GT Regina, SK, Canada

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 17, 2012

    Deep muscle car sound

    I spent days researching watching videos and reading reviews. I decided to go with Kooks because of the reputation they have, and the sound on a few videos. They took maybe 45 min to install very straight forward, perfect fit! At first start up to idle they have a nice low and deep sound, not crazy loud but definitely enough to know the sound is coming from a 5.0. At wide open throttle these come to life!! Cruising at highway speed there is no drone. I am very happy with these, I didn't want the ricer sound that a lot of axle backs have and these definitely do not. True mustang sound!!! Well worth the money the welds are true craftsmanship you can not go wrong with Kooks!


    Year: 2013 Submodel: GT Downham Market, Norfolk, UK

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    August 28, 2012

    Best axle-back exhaust for the 5.0 - Period!

    I've owned over a dozen Mustangs in the last 20+ years with tons of modifications being made to each one. Exhaust sound and look has always been a big deal to me, and I can honestly say the Kooks axle back is by far my favorite exhaust to date. The fit and finish is superb and the sound is amazing, not too loud, but just right, and no noticable drone. Installation is also breeze if you know your way around a car. I would definitly recommend this exhaust to anyone who wants their 5.0 to sound as bad as it looks. Kooks is more expensive than some, but the quality is well worth it.


    Year: 2012 Submodel: GT SC

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    February 17, 2012

    Great sound

    Install was simple, the axle backs are a light compared to the OEM axlebacks. Love the exhaust note, it sounds exhilarating when stomping on it. Quality is top notch and the welds look great.


    Year: 2012 Submodel: GT Georgia

    Helpful (3) (4)

  • 4/5

    Installation Time: Afternoon

    May 24, 2013

    Great low rumble

    They sound very good, give the low rumble I was looking for without being overpowering. Not to bad to install, just wish I knew about the need to drop the pan head bar to get the stock mufflers out. So if your doing them make sure you look up how to do that or you'll never get them out.


    Year: 2013 Submodel: GT

    Helpful (0) (3)

  • 5/5

    Installation Time: Less than 1 Hour

    February 26, 2016

    Exactly what i wanted

    so i had the flowmaster outlaws which sounded great at WOT but they droned like nothing I had ever heard, so I ended up getting the Kooks and what a difference, they have a great start up tone and a decent sound with light revs. When driving down the road they have a nice steady rumble that wont make you go deaf but will definitely catch some attention. I would highly recommend these to anyone that wants a nice rumble. Finally WOT could be a little louder but I am happy with my purchase, always room to make them a little bit louder with other exhaust mods or engine.


    Year: 2012 Submodel: GT

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    November 08, 2015

    Kooks axle back sound growl!

    Installed these Kooks axle back on My '13 BOSS 302 because I heard them on another BOSS and they sounded tough. If you want that deep, throaty growl go with these! No drone either and much lighter than stock. Beautifully crafted stainless pieces to boot.


    Year: 2013 Rockville Centre, NY

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    August 28, 2015

    Great axle back exhaust

    Kooks axle back exhaust was a great choice for me and my 2014 Mustang GT. I read a lot of reviews and listened to a lot of sound clips. I didn't want something crazy loud and I didn't want any drone on the highway. The Kooks axle back provided a deep exhaust tone during idle and a noticable difference during acceleration from stock and no drone cruising at highway speeds. I've gotten many compliments on the way they sound. The overall construction was great, almost to pretty to put under the car. Installation was a breeze.


    Year: 2014 Submodel: GT Metairie, LA

    Helpful (0) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    August 20, 2013

    Good product

    I didn't buy from AM but won this axleback in a contest along with over the axle pipes. This exhaust paired with an offload h pipe is amazing. Deep and mellow sound all throughout the RPM range. Deeper than the gt500 axle backs and my exhaust flows a lot better with these installed as well. It has a nasty growl when you step on it and I highly recommend this product


    Year: 2012 Submodel: GT Florence, AL, USA

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    December 27, 2012

    Kooks axel back on 2012 Boss 302 LS

    Easy install. Looks much better, Sounds great and much lighter that factory. Only thing that would make it a 5 for 5 on bang for buck is to include exhaust clamps to avoid reusing the factory clamps. Still a great value for the money.


    Year: 2012 Submodel: Boss Deep south Texas

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    June 30, 2012

    Great Exhaust!

    I am so happy with my choice. I was looking for something with a deeper tone, no interior drone, quite at cruise, and loud when you lay into it. Kooks has delivered a great product. Fit and finish is superb. I love the look of the tips and that the whole system is polished. No regrets!!


    Year: 2013 Submodel: GT Royal Oak MI

    Helpful (0) (0)

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