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Borla ATAK Cat-Back Exhaust with Polished Tips (05-09 GT)

Item 29029
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      Review & Installation Video

      Hey, guys. Today we're gonna be taking a look at and installing the Borla ATAK cat-back exhaust for 2005 to 2009 GT Mustangs. You're gonna wanna be checking this cat-back out if you're looking for a high-quality cat-back that's going to deliver a ton of volume and a ton of sound.This cat-back comes with Borla's ATAK mufflers in it, and they're the loudest mufflers in the Borla lineup. On a scale of one to five, with one being a quiet upgrade and five being a very loud upgrade, I'm gonna call these a solid four out of five. They can definitely be a five out of five under wide open throttle. The rest of the cat-back is two and a half inch mandrel bent stainless steel, which is gonna be a great option for you guys out there that are looking for corrosion resistance. The cat-back costs about $770. I'm gonna call it a two out of three wrenches on the difficulty meter when it comes to the install. We'll go ahead and show you how to get it on your car now.For this install, we used a 3/8 drive cordless impact gun. You can always just use a 3/8 ratchet if you want to, a 13-millimeter socket, a 15-millimeter socket, a flathead screwdriver, a rubber mallet is always nice to have just in case, and if you need to cut your exhaust off like we needed to, you'll need a Sawzall with a fresh blade on it.All right, guys, to start your stock exhaust removal, what you'll need is a 15-millimeter socket. We're gonna go ahead and try to loosen these clamps here. Now, if your clamps or your exhaust look anything like the one on this car here, you're gonna want to make sure you have a lot of WD-40 or PB B'laster. It's really gonna help you get these clamps undone.All right, guys, if your clamps are stuck like ours are, all I'm doing is taking a flathead screwdriver and I'm prying the clamp open here. All right. And we are gonna do the same thing on the other side over here. So I'm just wedging the flathead screwdriver in between the clamp here and working it loose.All right, guys, now we're gonna go back here and undo this clamp right here right at the muffler. All right. And then, of course, we'll do the same thing on the other side. All right. And we're gonna do the same thing with a flathead screwdriver on these clamps back here just to make sure they're releasing. All right, guys, at this point, I'm gonna take my mallet. I'm gonna bump both of these clamps forward just so I can try to disconnect this connection right here.All right, guys, so at this point, our exhaust is not disconnecting right here at the over axle pipes to our axle-back. So what I've done is I've tightened up the clamps by the H-pipe up there and I've got the Sawzall. And I'm just going to cut the connection myself. So, if you're going to do that, make sure you guys have safety glasses, a fresh Sawzall blade, and you're cutting in a place where you're not gonna be cutting through anything or doing damage to any other parts. So we're gonna go ahead and just cut through right here right by our axle-back.All right, guys, now what we're gonna do is we're gonna undo these two 13-millimeter bolts that are holding our exhaust hanger in place just because you guys can see the way that this hanger is right here. It's gonna be really hard to get this out. So we're just gonna undo these bolts right here.All right, guys, we're gonna do the same thing on the other side being very careful of our fuel lines here. That's why we're cutting away from them. All right, guys, so we're gonna do the same thing on this side as well with removing this hanger. All right, guys, from here, what we're gonna do is loosen our clamps back up. And I'm gonna take my mallet, knock the clamps backwards, and then pull down the over axle pipes.All right, guys, with the factory cat-back out of the way, the first thing we're gonna do is grab the straight pipes that Borla gives us. We'll transfer our clamps over. We're gonna go ahead and get these installed on the H-pipe. We're gonna leave all the clamps loose for now until we have everything lined up and then we'll go ahead and tighten them down as we need to. So I'm just sliding my clamp over the pipe. I'm gonna ahead and get this installed on the H-pipe.All right. Now we're gonna get our over axle pipe installed. Just make sure you have a clamp here before you install your over axle pipe. I'm gonna go ahead, loop this over the axle. Now, I'll make the connection here. Like I said, we are gonna leave everything loose for now. We're gonna go ahead and do the other side.All right. So once again, we'll go up and over the axle. All right, guys, so now at this point, we're ready for the axle-back. I have transferred over our factory hanger from our factory axle-back. I'm gonna go ahead and get this in place. Then what I'm gonna do is get my hanger in place. I'm just gonna get my two bolts started.All right. And we're gonna go ahead tighten these down. All right. Now we're gonna go ahead and tighten down our other clamps on this side. What I'm doing right now is I'm taking a peek at the tip and making sure that I'm lined up correctly. All right, guys, so we're gonna do the exact same thing on the other side. One thing to note real quick, if your car is equipped with the hangers that go near the tip right here, you can go ahead and swap over those hangers as well. If not, you can go ahead and install this without it. It will be just fine or you can also purchase the additional hangers and put them right here if you want to. We're gonna go ahead and install this without those hangers. So we're gonna slide this onto our over axle pipe. We do have a clamp on our axle-back already.All right. So now we're gonna go through and tighten our clamps on this side. All right, guys, that's gonna wrap up this review and install. Keep in mind you can always check this cat-back out more online right here at

      Product Information

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


      • Loud Aggressive Sound
      • "ATAK" Race Inspired Mufflers Included
      • 2.5" Mandrel-Bent Stainless Steel Tubing
      • 4" Polished 304 Stainless Steel Tips
      • Fits 2005 to 2009 GT and Bullitt Mustangs


      Loud Aggressive Sound. Add a touch of Borla excellence to your GT Mustang with an "ATAK" Cat-Back Exhaust System. A Borla "ATAK" catback system will significantly increase exhaust flow over the restrictive stock exhaust system for a dramatic increase in horsepower and an aggressive muscle car sound that is not for the faint of heart.

      ATAK. Acoustically-Tuned Applied Kinetics, is Borla's newest technology that produces the highest available dB (decibel) levels to pump the volume while retaining clarity of sound, avoiding distortion typically found in louder exhausts.

      High Quality Construction. Constructed from ultra smooth mandrel bent 2.5" stainless steel tubing to improve exhaust flow, the Borla Cat-Back Exhaust System features two race inspired "ATAK" mufflers with 4 inch polished stainless steel slant tips for aggressive sound and impressive looks.

      Application. Designed as a direct bolt on, this Borla ATAK Cat-Back will bolt straight up to the factory Mid-Pipe without any modifications required on the 2005 to 2009 GT and Bullitt Mustangs.

      Technical Note. Americanmuscle recommends adding the 2005+ Mustang 304 Stainless Steel Exhaust Hanger Kit from the drop down option above, to provide more strength, stability and a cleaner installed appearance. If you have a 2007 Mustang you may need the kit for correct installation.

      Fitment: 2005 2006 2007 2008 2009

      MPN# 140382

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (54)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 54 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • March 09, 2020

        4 2005 GT - AustenJ Installation Time: Less than 1 Hour

        Borla atak

        Great quality material easy to install. 10/10 recommend!

        Helpful (0)
      • September 17, 2019

        3 2006 GT - ray

        over axle pipes wouldnt fit had to re use stock ones

        Helpful (0)
      • June 02, 2019

        5 2016 GT - BrianH Installation Time: Shop Install

        Best sound!

        This exhaust has the best sound! Minimal drone as well!!

        Helpful (0)
      • May 03, 2019

        5 2007 GT - StealthStallion Installation Time: Less than 1 Hour

        Awesome sound, easy installation

        Ordered the kit about 2 weeks ago, took roughly 4 days to arrive. Too eager to have it installed, I opted to install it myself instead of going to a shop. I put the rear end up on jack stands and unfortunately had to do some cutting on my old exhaust as the owner before me had it welded quite poorly. The Borla kit went in extremely easy and the clamps are super tight! Each peice is labeled left and right to make it timeless to figure out which are which. I do recommend some wratchet hand wrenches if you can, makes getting to the exhaust supports above the muffler a lot easier to work on. I couldn’t believe the sound on first crank, (catted h pipe) it was still pretty loud, not too obnoxious which is what I was looking for without an Off road pipe. Very deep, can be a bit poppy if you rev it high

        Helpful (0)
      • April 29, 2019

        5 2009 GT - don444 Installation Time: Shop Install Installation Cost: $500-$1000

        Borla atak exhaust

        well has a mean and aggressive exhaust note perfect for those looking for that aggressive sound

        Helpful (0)
      • March 18, 2019

        5 2009 GT - Tyler Installation Time: Afternoon

        One Word: Epic

        This system oozes quality and performance from the moment the box arrives at your door. Impressive packaging with no damage. Includes two Borla stickers and a hat. Installed using basic tools and jack stands. Took around two hours to install. Fit and finish are flawless. Once you turn it on for the first time, you will wonder why you didn't do this years ago. Perfect exhaust note and great volume. Wont wake the neighbors unless you mean too, but if your trying you can set off car alarms in a parking garage. Perfect system.

        Helpful (0)
      • January 20, 2019

        5 2009 Bullitt - dazedmike Installation Time: Afternoon

        Not for the faint of heart...

        I have had this full system, coming off BBK ceramic LT, into BBK catted X-pipe since Borla first offered it. As I wanted by 2008 Bullitt to sound like my '69 Mach I had to go with a nice lope type cam the Ford hot rods are what I have. Not going to lie, if you put your foot down these certainly roar, I cruise the freeway windows down and nothing loud inside the car, though friends have said that they hate being behind me when I punch it!

        Helpful (4)
      • January 05, 2019

        5 2009 GT - Sean09GT Installation Time: Less than 1 Hour


        I have this cat back paired with the pypes catless h-pipe and the cold starts in the morning are absolutely ridiculous! My neighbors know exactly when I leave for work every morning. Once it idles down its much quieter. Driving around town is very loud but on the freeway it’s actually very quiet with minimal drone. Install took me about an hour to drop the old catback and put this one on. Borla is definitely one of the pricier options but it is by far the best quality, best fitting, and best sounding exhaust I’ve had (this is my fourth set up). It’s a very deep and throaty tone and sounds like a true muscle car. I’ve convinced my friends with 5.0’s to switch to Borla with how my 4.6 sounds! I highly recommend Borla!

        Helpful (5)
      • October 02, 2018

        5 2008 GT - David

        Borla Atak

        Made my Mustang GT sound exactly how it’s supposed to sound. Don’t bother with getting a cheaper exhaust this is the sound you want.

        Helpful (5)
      • June 14, 2018

        5 2005 GT - BigDave Installation Time: Less than 1 Hour

        Borla Atak

        This system is awesome, the sound is better in person than any video on this product. Definitely recommend these mufflers if you are looking for an aggresive system

        Helpful (9)

      Questions & Answers (22 answers)

      5 Top Rated Questions

      Would this fit a v6 I'm looking for a nice exhaust to make my v6 sound mean. Would this work and what would I have to add to make it work? Any other specific products that could satisfy my need, if this does not work?

      • You wouldn't be able to bolt this on your V6 as is since your factory exhaust is a single. You would be able to install this ATAK Catback if you combined it with the Pypes Cut and Clamp X-pipe. It reuses your stock catalytic converters and allows for the use of a GT catback. I've attached the x-pipe below so you can take a look. Hope this helps!

      Helpful (5)

      Do you have a video showing how loud it is? All I see is a install video

      • We do not have a sound clip, however, ATAKs are on the list for the absolute loudest mufflers we have to offer, so you won't find anything louder we have to sell.

      Helpful (0)

      Why won't this system fit an 07-09 Shelby GT500?!

      • Hi. Unfortunately, this Borla ATAK Cat-Back Exhaust is designed to fit 05-09 GT's and will not fit on a 2008 GT500 due to different mounting points. With that being said, Borla does offer an ATAK Cat-Back exhaust that will fit a 2008 GT500. You can find it on our website at:

      Helpful (0)

      I have a 2005 Mustang GT. Is there a difference in sound on the Borla atak axel-backs VS. Borla atak cat-back? All your paying for is a stainless over axel pipes on the catback? Cause if the mufflers are the same and sound the same, and all I would be paying for is a stainless over axel pipe. Then the Borla Atak axel-back should be fine to purchase? Help clarify please.

      • Tone wise, both the axle-back and cat-back would be the same. However, for the volume of the exhaust as well as the performance gains, the over axle pipe size does make a difference as they would be less restrictive from the OEM.

      Helpful (0)

      Will this fit with the pypes longtube headers and shorty xpipe combo that i ordered ? Thank You!

      • This exhaust will work with the Pypes long tube headers and shorty mid pipe.

      Helpful (0)
      10 More Questions
      What brand H-pipe would go best with this system? Trying to avoid an X-pipe due to the raspy sounds. 1 answer
      Is this system street legal in Texas? 1 answer
      What number is this on the loud meter, a 4 or a 5? 1 answer
      I have pypes true dual exhaust kit on my 07 v6 will these fit to the existing x pipe 1 answer
      Do I need to buy and x pipe in order to install long tube headers? Or does this system have what I need to install long tube headers 1 answer
      Which headers should I get along side these? 1 answer
      Does this Catback fit a 3v swapped 03 GT? 1 answer
      This doesn't require a tune does it? 1 answer
      Are attacks louder than stinger 1 answer
      Would this fit my 2007 Shelby GT? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Straight pipes
      • (2) Over axel pipes
      • (2) Muffler assemblies
      • (4) Clamps

      Tech Specs

      Axle-Back Exhaust Specifications
      Piping Material: Stainless Steel Tip Material : Polished Stainless Steel
      Piping Size: 2.5" Tip Size: 4"
      Muffler Type: Straight-Through Fitment: 2005-2009 GT

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