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Borla 3-Inch Cat-Back Exhaust (11-14 GT; 11-12 GT500)

Item 29021
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • 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

      MPN# 140389

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (12)

      Write a Review

      Ratings Summary

      4.9 out of 5 overall rating from 12 customers

      Installation Time: Full Day

      Installation Cost: $100-$250

      • April 25, 2019

        5 2013 GT - Brixlee79 Installation Time: Afternoon

        Completely satisfied

        The sound is amazing! I get compliments from everyone! :-) Beautiful growling sound, doesn't sound like a stock car. Won't wake your neighbors. :-)

        Helpful (0)
      • August 31, 2018

        5 2013 GT - RandyS Installation Time: Shop Install Installation Cost: $100-$250

        Great Sound!

        These are perfect in every way for what I was looking for. Can start up early hours in the morning without waking the neighbors and when you want that mean growl it’s right there waiting for you at the drop of your foot!

        Helpful (5)
      • July 17, 2017

        5 2003 Cobra - DrewC Installation Time: Afternoon

        The perfect exhaust note

        Put this on my 2012 Super Snake with 7/8 headers and holy cow! When you jump on the gas this thing screams! It quiet enough in the cabin but if you are driving behind it you might as well get new ears. This is a must if you have a GT500

        Helpful (8)
      • June 08, 2017

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

        5 2014 GT - JordanA Installation Time: Shop Install Installation Cost: $100-$250

        Love it!

        Great sound. It's loud and mean when you want it, but also quiet at lower RPM so it's not droning on and on at highway speeds. Looks great and is high in quality.

        Helpful (8)
      • April 05, 2016

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

        5 2014 GT - Punisher89 Installation Time: Shop Install Installation Cost: $100-$250

        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.

        Helpful (9)
      • May 22, 2015

        5 2014 GT - CJS Installation Time: Afternoon

        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.

        Helpful (10)
      • January 13, 2014

        5 2012 GT - Red302

        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

        Helpful (8)
      • August 27, 2013

        4 2013 GT - hilljd Installation Time: Afternoon

        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

        Helpful (9)
      • July 01, 2013

        5 2013 GT - Crunchytac0 Installation Time: Afternoon

        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.

        Helpful (9)
      • July 01, 2013

        5 2014 GT - Afraidofthedark Installation Time: Afternoon


        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 (8)

      Questions & Answers (18 answers)

      5 Top Rated Questions

      I own a 2012 Shelby GT500. Will this exhaust match up with the factory H pipe if I wanted to keep it in place or would I have to use the supplied X pipe?

      • We would recommend using the supplied x-pipe as that is guaranteed to fit. The factory mid-pipe may require modifications.

      Helpful (2)

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

      • Borla does a great job of eliminating drone from their exhausts. Although you will definitely hear some noise in the cabin to most it isn't overbearing, although exhaust loudness is 100% subjective.

      Helpful (1)

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

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

      Helpful (1)

      If you guys don’t sell the XR-1 Borla long tube headers no more, then what other headers can be used? I’m planning on using BBK ceramic long tube headers, will they work?

      • The only long tube headers this is designed to work with are the Borla XR-1 long tube headers by deleting the catalytic converters. This has not been confirmed to operate with any other long tube headers.

      Helpful (0)

      I’m planning on running BBK 1-3/4 in. Chrome long tube headers, will work with it? Or do I need to do a specific modification?

      • This will work with these headers yes.

      Helpful (0)
      Post Your Question
      10 More Questions
      Is this the touring series? 1 answer
      Hi what is the difference between the Borla 3 in. Cat-Back Exhaust - Black Tips(11-14 GT; 11-12 GT500)andBorla 3 in. Cat-Back Exhaust (11-14 GT; 11-12 GT500)they look different in the description also are these the s-type if not what is the difference I can't have anything to loud as I have stupid laws 1 answer
      Are the ends of the exhaust tips rolled or bevelled? 1 answer
      Where do the two red heat shield tubes go? 1 answer
      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? 1 answer
      Is this the atak system? 1 answer
      Will this fit aftermarket shorty headers? Of course this is assuming I'm reusing the stock cats. 1 answer
      Will this work with kooks 1-3/4inch long tube headers? 1 answer
      What muffler comes with this system? 1 answer
      Cat delete Can you still delete the cats if you don't get the longtubes with the downpipes included in this system? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) X-pipe
      • (2) Short down pipes
      • (2) Over axel pipes
      • (2) Muffler Assemblies
      • (6) Clamps

      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

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