WIN $5,000 For Your Mustang! Enter Now
Talk to a Mustang Expert
Mon-Sun 8:30 AM - 11:00 PM EST

Free Shipping On Orders Over $49. Details

Borla 3 in. Cat-Back Exhaust (11-14 GT, 11-12 GT500)

Market Price $1,585.99 You Save 11% ($170.00)
Our Price


FREE Shipping
  • Item 29021
  • MPN# 140389

Out of Stock Notify Me Choose options to add to cart

Features & Details

  • Aggressive Sound
  • Race Inspired Mufflers
  • 3" Mandrel-Bent Stainless Steel Tubing
  • 4.5" Polished 304 Stainless Steel Tips
  • X-Pipe Included
  • Smog Legal - When Reusing Your Stock Catalytic Converters
  • Off Road Use - When Used with Borla Long Tube Headers
  • Fits 2011-2014 GT & 2011-2012 GT500 Mustangs
Loud Aggressive Sound. Add Borla excellence to your coyote powered GT Mustang with a Borla 3" Cat-Back exhaust. This Borla Cat-Back will greatly improve your 5.0's exhaust flow for more power and an aggressive muscle car sound that everyone will love.

Street or Off-road Use. The Borla Cat-Back Exhaust X-Pipe bolts up directly behind the stock catalytic converters making your Mustang 100% smog-legal. Or it can be installed with Borla's XR-1 Long Tube Headers, deleting the stock cats for even more power and making it perfect for off-road use.

High Quality Construction. Constructed from ultra smooth mandrel bent 3" stainless steel tubing to improve exhaust flow, the Borla Cat-Back Exhaust System includes an X-Pipe and features two race inspired mufflers with 4.5 inch polished stainless steel slant tips for aggressive sound and impressive looks.

Application. This Borla 3" Cat-Back Exhaust System with included X-Pipe has a versatile design that allows it to fit 2011-2014 GT and 2011-2012 GT500 Mustangs equipped with either the stock manifolds or aftermarket shorty headers installed. It can also be installed on 2011-2014 GT or 2011-2012 GT500 Mustangs with a set of Borlas XR-1 Long Tube Headers by deleting the catalytic converters.

Technical notes. By removing the catalytic converters this exhaust is no longer legal for use on pollution controlled motor vehicles; and will be intended for off road use only.

Fitment: 2011 2012 2013 2014 Details

What's in the Box
  • (1) X-pipe
  • (2) Short down pipes
  • (2) Over axel pipes
  • (2) Muffler Assemblies
  • (6) Clamps
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 3" Tip Size: 4.5"
Muffler Type: Straight-Through Fitment: 2011-2014 GT, 2011-2012 GT500
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • GT - 11, 12, 13, 14
  • GT500 - 11, 12

Most Helpful Reviews

Amazing tone when you want it...

I've had this exhaust for about a year now and I have to say it's definitely my favorite mod. It's loud... really loud! At cold start, you might have some angry neighbors, but it mellows out after about ...

Read More
Helpful (3)


This exhaust is exactly what I wanted for my vehicle. With my performance mods and tuner it's what the car needed. Loud when you want it, quiet when your cruising around of on highway.

Helpful (1)

Overall Rating 4.9 out of 5 stars
Read All 8 Reviews

Customer Photos (7) Submit Your Photo

View All 7 Photos

You Might Also Like

11 Questions / 5 Answers

Ask a Question

Does this exhaust drone at all? And is the interior noes overbearing?


Helpful (0)

I plan on running a long tube header application in the future, would this catback pair up well with Stainless Works Long Tube headers? If not why?


Helpful (0)
  • This cat back exhaust system may work with the Stainless Works long tube headers but it may need custom modification for it to work. If you would like to run that setup, please consult with a trusted exhaust shop to see if it would work. On the other hand, the best fit long tube headers for this cat back would be the Borla XR-1 long tube headers item #29022 as they were made to work in unison with each other.


Does this setup come with resonators for optional use or is there no resonators at all?


Helpful (0)
  • This exhaust will come with resonators as you can see pictured in the product photo for optimal use.


Is this the atak system?


Helpful (0)
  • This is not the ATAK system as it does not have the resonators in in this system right before the over axle pipe.


Will this fit aftermarket shorty headers? Of course this is assuming I'm reusing the stock cats.


Helpful (0)
  • The Borla 3 in. Cat-Back Exhaust (11-14 GT, 11-12 GT500) will be able to be equipped with either the stock manifolds or aftermarket shorty headers installed as found in the Application section of the item page.


Will this work with kooks 1-3/4inch long tube headers?


Helpful (0)
  • This Borla 3 in. Cat-Back Exhaust (11-14 GT, 11-12 GT500) will only work with the Borla XR-1 Long Tube Headers (11-14 GT, BOSS) Item #29022 ( To work with the Kooks long tube headers, you will have to use the Kooks mid pipe rather than the Borla mid pipe, and the cat back section should bolt up to the Kooks mid pipe with no problems.


More Products You Might Like

Customer Reviews (8) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.75 4.8
  • Exhaust Note 5 5
  • Fit & Finish 4.625 4.6
  • Bang For Your Buck 4.25 4.3

  • 5/5

    Installation Time: Full Day

    August 06, 2012

    Amazing tone when you want it...

    I've had this exhaust for about a year now and I have to say it's definitely my favorite mod. It's loud... really loud! At cold start, you might have some angry neighbors, but it mellows out after about 30 seconds. It has a deep rumble with an almost exotic tone when your accelerating. It sounds so nice between 2000 and 3000 rpms. And at WOT it roars! Deep, loud, rumbling in your seat fun... And the best part, it's only a notch or two above stock when you're in 6th on the highway. I'd definitely reccomend this or the S-Type Borla exhaust to any late model mustang owner. Amazing quality, craftsmanship, and durability.


    Year: 2011 Submodel: GT Austin, TX, USA

    Helpful (3)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    April 05, 2016

    Review from Borla 3 in. Cat-Back Exhaust - Black Tips (11-14 GT; 11-12 GT500)

    Meanest Growl you could imagine

    Borla has outdone themselves once again. The sounds is amazingly mean and throaty. So much better than any x pype, roush, or flowmaster you can buy. I also like the 3" portion and true x pipe, which gives you very little back pressure so your 5.0 can shine. I would recommend this exhaust to anyone that wants great sound, good power upgrade, and amazing back pressure drops.


    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 22, 2015

    Awesome sweet sound.

    Well, I researched what exhaust to buy for several months to be able to make the right decision, because I see it more of an investment because of the expense. Based on quality and finish I had two brands to pick from, Bassani and Borla. I had known that both were famous for quality of workmanship. I had heard Borla before but not on a Mustang. I had never heard Bassani before on anything so I decided to wait and finally about a week ago I saw a very well made video on youtube and the guy put Bassani and a Borla on his Mustang. Copy and paste if you are interested to see it (Bassani Axle-Backs vs. Borla ATAK Axle-Backs). The quality of sound of the video was good enough and he used the same protocol for both (apples to apples). I am not saying that Bassani is bad so please don't misinterpret me. I think that both sounded great but I found the Borla to be more aggressive and with a deeper sweeter sound more to my taste and boy I tell you I have no regrets. Quality of materials is really first class and it sounds amazing, super loud when you need it to be and perfect when you don't. Heads up, I am already wasting a lot more gas just running lower gears constantly just to hear the awesome deep sweet rumble. I paid a shop to do the install and the passenger nozzle is touching the rear valance so I am going to take it back to get it straighten out but that was the installer's fault. I also have to say that this is the first time I ordered from American Muscle and I am extremely impressed with the service and super fast free delivery, I couldn't believe it. I ordered an MGW shifter from another company a month earlier and I got it a day after I got the exhaust. An hour after I ordered the exhaust I got an email saying the item had been shipped and two days later I got it. Amazing for such a heavy item. Thanks American Muscle, you surely have a new satisfied customer here.


    Year: 2014 Submodel: GT Omaha, NE

    Helpful (1)

  • 5/5

    January 13, 2014

    Highly recomend !

    I highly recomend this exhaust i was debating over the borla s- type but decided to go with the Atak not only do you get a great sounding exaust but u feel a little kik as you drive your stang


    Year: 2012 Submodel: GT California, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 01, 2013


    This exhaust is exactly what I wanted for my vehicle. With my performance mods and tuner it's what the car needed. Loud when you want it, quiet when your cruising around of on highway.


    Year: 2014 Submodel: GT New York, NY, USA

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    August 27, 2013

    Great tone, overrated volume

    If you've read anything about the atak system on the forums, you would swear that hearing them would make your ears bleed. That is really not the case. They are definitely louder than stock, but not offensively so. I really wish they were louder, but I'm satisfied with how much sound they produce. They idle at about the same volume as stock and don't exceed stock decibels too much until about 2.5k. They scream pretty well after that, but they aren't gonna set off any car alarms. The tone is incredible. It's a nice growl with a great burbly decel. American muscle was very timely with shipping. Ordered it on a Sunday and it was here by Friday. Unfortunately, the passeng er side muffler had a ding about 4 inches back from the tip. The tips don't stick out far enough for it to be noticeable, however. Still, this is the most expensive catback offered, so that was kind of disappointing. install was very straightforward, with only a couple of headaches. Took about 3 hours on a lift. All in all a great product, but a touch over priced. If I had to do it again, I'd probably go with something that deleted the cats and made a bit more sound


    Year: 2013 Submodel: GT Little Rock, AR, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 01, 2013

    Borla 3" Catback exhaust

    I have been searching for exhaust systems for months now and could not decide which one to go with. After making up my mind I decided to go with the Borla Catbacks and I could not be more satisfied with my purchase. The sound is amazing and loud, and always puts a smile to my face when I turn my car on. Yes, it's a little pricey but trust me, it's worth every penny.


    Year: 2013 Submodel: GT Pilot point, tx, USA

    Helpful (1)

  • 5/5

    Installation Time: Full Day

    June 29, 2012

    Long install, but worth it

    I put this on my 2011 Mustang GS/CS. It took longer than expected but it was wealth worth the time and money. Sounds mean


    Year: 2011 Submodel: GT Manassas, VA

    Helpful (0)

Related Mustang Categories