Borla Axle-Back Exhaust Kit 2-1/2" S-Type Stainless Steel With 4" Polished Tips GT 2015-2017

Borla Axle-Back Exhaust Kit 2-1/2" S-Type Stainless Steel With 4" Polished Tips GT 2015-2017 is rated 4.6 out of 5 by 10.
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  • Stainless Steel Construction
  • 2-1/2" Mandrel Bent Piping
  • 4" Angle Cut Exhaust Tip
  • Easy Installation
MSRP $876.99
You save 11%

Borla Stainless Steel S-Type 2-1/2" Axle-Back Exhaust Kit with 4" Polished Exhaust Tips for all 2015, 2016 and 2017 GT Mustangs.

Everyone knows the potential of the 5.0L Coyote V8 that’s lurking under the hood of your new but the factory exhaust leaves a lot to be desired for your average muscle car enthusiast. Sadly, one of the first things you are bound to notice on your new 2015-2017 Mustang GT the moment you bring it home from the dealership is how tame and subdued it sounds. But…Borla has the perfect solution!

Borla introduces their brand new S-Type Axle-Back Kit for all 2015-2017 GT Mustangs to help alleviate this issue. Manufactured entirely out of T-304 Stainless Steel, this 2-1/2" Axle-back exhaust Kit will give you that perfect muscle car sound. This Borla Axle-Back exhaust kit utilizes cut and clamp design that will bolt directly up to your factory exhaust piping after the rear axle, keeping your Mustang 100% emission compliant. And the tuned S-Type mufflers with 4" polished stainless steel tips not only sound amazing but will look great for the life of your Mustang.

Features and Benefits:
- Easy Cut and Clamp Installation
- Full Stainless Steel Construction
- Polished 4” Angle Cut Rolled Exhaust Tips
- Borla Logo Embossed on each Exhaust Tip
- 2-1/2” Mandrel Bent Piping
- Straight Through Design with No Drone
- Reuses Stock Exhaust Hangers and Mounts
- Includes All Necessary Hardware and Instructions for Installation

*This kit WILL fit both the Fastback and Convertible 5.0L GT Mustang.

The factory exhaust is frequently the first item to get replaced in any new or classic Mustang restoration, and rightly so. The increased performance and better sound that you'll get from an aftermarket system usually far exceeds what the factory can offer. The products from Borla Performance Industries are some of the top exhaust systems available for your Mustang.

Order the Borla Stainless Steel S-Type 2-1/2" Axle-Back Exhaust Kit with 4" Polished Exhaust Tips for your 2015, 2016 or 2017 Mustang GT from CJ Pony Parts today!

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

Regular viewers of this YouTube channel know I'm a fan of the Borla S-type muffler. I ran the S-type axle-backs on my twenty eleven mustang, and the s-type cat back is the current system of choice for my 2015. Many of you have asked though what the axle-back's going to sound like on the 15 if you keep the factory resonator. So today we're going to install the s-type axle-back on my 2015 and give you some sound clips. I've always liked the s-type muffler because it gives you a nice aggressive sound on wide open throttle but is very tame for cruising and offer no drone whatsoever. Just like the cat back system, the Borla S-type axle-back is available in your choice or either a polished or a black four inch tip.

For this installation today, a lift or a jack and jack stands, half inch ratchet, 15mm socket, tape measure, marker, sawzall and safety glasses.

Like many other axle-backs we've already shown you, this one's going to cut in right back here behind the axle. Because it is an axle-back system, this is going to fit your fast back or convertible. Just follow the curve until it ends, I'm going to measure over two inches from the end of the curve, mark, and cut.

Once it's cut now, slide it off the hanger. Once you have the pipe cut off, the installation's very easy. You slide it up into the rear hanger first, line the pipe up, and slide it over. Tighten the clamp and repeat the process on the other side.

Now let's see how our S-type axle-back sounds. Very similar sound to the cat back, I thought it would, a little less volume but very similar tone. Right out of the box, the Borla S-type has the sound I kind of expected the axle-back to have. It's got a similar tone of the cat back, just less overall volume. It sounds really good in it's own right, and probably if you put it one of our H-pipes sound even better.

Just like all Borla's now, now we're cruising at 2000 RPM, 65 miles an hour on the highway, zero drone, don't even know it's back there. Give it a little gas, it wakes up, but cruising speeds you can drive all day and not even know its there.

Overall, the S-type, again I'm still a fan. It's a good sounding muffler if you want something that has a nice rich tone, really sounds good when you get on it, but no drone on the highway, nice and quiet, it's an excellent choice. Like all the axle-back systems you have to cut to put it on, but overall the installation's pretty simple, takes about an hour to do so you can be back on the road in no time.

Vehicle Fitment

This product will fit the following Mustang years:

Rated 5 out of 5 by from Sounds Incredible! I just installed your Borla Stinger S-Type Exhaust on my Mustang GT on Saturday. Ordered from CJ Pony Parts on. Wednesday morning and it arrived the next day by noon. Exhaust arrived extremely well Packed and protected. The quality and construction is incredible and the fit is perfect. No installation issues at all. It took me 2.5 hours because I took my time. Installation looks professional. The sound is AMAZING. Idling in traffic or light throttle its quiet but still louder than stock and you can still tell its no not stock. The more you press the throttle the fuller and louder it gets. I am extremely happy with my purchase. Awesome!
Date published: 2019-04-19
Rated 3 out of 5 by from best soundiexhaust for the Mustang, but fit is off I finally ordered this and swapped out the Roush. Smooth, deep, and loud when opened up. I agree with the general opinion that this is the absolute best sounding system for the new Mustang. I was contemplating the Touring axle-back but I'm glad I went with the S-Type. If you want a mild system, just do a resonator delete and keep the factory mufflers. If I could do it all over again, I would've installed the S-Type cat-back from the very beginning and called it a day. The fit of the mufflers is OFF. The hanger on the driver side had to be heated and bent downward, as it was too high and nearly touching the valence. The passenger side muffler hangs low and the muffler is tilted. Heating the hanger and pushing it up will not likely solve the problem correctly. I definitely couldn't have installed this system properly without my local exhaust shop. Aesthetically, it looks uneven and asymmetrical from the rear of the vehicle since the right muffler is lower/tilted and doesn't match the left side. I did some research and this seems to be a problem at the factory. I hope they can resolve the issue. Borla also manufactures the Roush axle-back and the passenger side muffler placement was off on that system as well. I can only recommend this product based on the sound alone. The look from the back is uneven and it annoys me. I will be seeking a remedy through Borla which is a hassle. When you spend this kind of money on a product, it should fit perfectly out of the box.
Date published: 2015-06-10
Rated 5 out of 5 by from Now we talking Great Sound! I added this to my 2017 Mustang about 6 months ago. I have loved it no drone somewhat aggressive on takeoff and gets compliments all the time. Wanting a little more, just the other day I had the MRT H pipe added and all I can say is do it! This system with the MRT H pipe is just perfect. It is deep aggressive when you want, quiet a cruise with zero drone. Although you could probably wake up your neighbors with it you don't have to if you just drive conservatively at the appropriate times. I also have noticed a small power increase with the resonator gone. Hesitated to put the H pipe on because I thought maybe it would be too loud. It is not it is awesome! You could not ask for more.
Date published: 2017-10-26
Rated 5 out of 5 by from It's alive and roars Finally had these installed by R-Tech Motorsports in Chesapeake Va. They decided to cut by their measurements instead of direction. They cut pipe just past turn of muffler instead of the 2" measurement instructed. When completed, the muffler tips fit perfectly with factory cutouts. They even showed me before they cut old mufflers off, just how much the factory tips where off center. They large tips fit nicely, and the roar is alive like a Mustang should sound. One satisfied customer here. Thanks.
Date published: 2016-03-23
Rated 4 out of 5 by from Nice Exhaust except for drone!! Choose this exhaust based on reviews and the "no Drone" claims. ( actually wanted to go ford racing but CJ o/s). However definitely a low drone when cruising at 70 which I am not sure I can live with. Probably change for Touring or Ford Racing Touring . Just wish the GT500 exhausts for the 13 GT were available for the 15. Those were perfect on my old 13!
Date published: 2015-07-22
Rated 5 out of 5 by from Delivered to my door in Australia I am very impressed not only with the product but that CJponyparts delievered to my front door here in Australia in less than 1 week. You guys rock! With over 6000 2016 Mustangs on order from Australia this year alone your international reach is sure to be a good move for your business. Thank you!
Date published: 2016-05-24
Rated 4 out of 5 by from Excellent sound for an Axle-Back exhaust! I bought the Axle-Back Exhaust in order to achieve the "muscle car" sound that does not come out of the stock exhaust (on my 2016 Mustang GT). It came with the clamps, instructions, and the shipping packaging had both exhausts snugged properly. Exhausts were labeled "L" and "R" for the people that cannot distinguish the proper orientation.The Borla exhausts definitely give a deeper and "throatier" sound, specially in low gear/high rpm, but also has a good "hum" on 6th gear when cruising in the freeway. These are meant to give that extra and true muscle car sound without causing any extra attention (specially from the cops). The one thing I thought looked sloppy were the tube welds on the exhaust, but it did not affect the sound nor any form of exhaust leak was found. Other than that, this product was great and I would recommend it to other mustang owners that want that extra sound boost.
Date published: 2015-12-01
Rated 5 out of 5 by from Best exhaust, period. Since I'm unable to edit my previous review, I'm writing another one. Borla's customer service is excellent and guided me on how to correct my fitment issues. It turned out the x-pipe I had previously installed could be massaged to make the mufflers fit correctly. With that being said, it now looks as great as it sounds. I'm very happy with this exhaust and it's definitely worth the extra money.
Date published: 2015-06-16
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Will this fit my 2016 v6 mustang

Asked by: Timdog
They will not fit, we offer this catback for the v6,
Answered by: rk cjpp
Date published: 2017-02-23

What is the difference in sound between the Borla S Type axle back and the Ford Racing Sport axle back - with resonator left on? I had heard that the Ford Racing Sport was not as loud, but similar in tone. Is that correct.

Asked by: philrob51
They are extremely similar, but I would agree that the S-Type was slightly louder.
Answered by: CJPP Dave
Date published: 2017-05-25

Which is louder with the resonator left on - This Borla S Type or the Roush?

Asked by: philrob51
Answered by: CJPP Dave
Date published: 2016-11-29

Will these fit a 2015 GT convertible?

Asked by: philrob51
Answered by: CJPP Dave
Date published: 2016-06-14

Do you have any videos of this axle back teamed up with your MRT Resonator Delete H Pipe?

Asked by: prf76
No we do not.
Answered by: rk cjpp
Date published: 2016-06-10

From this video, it sounds as if this Borla S-type, with resonator left on, is not as loud and raspy as the Ford Racing by Borla Touring axle-back with MRT H-pipe.  Anyone have thoughts on this?

Asked by: philrob51
Removing the resonator will make even the quietest exhaust system noticeably louder then a more aggressive axle-back.
Answered by: CJPP Dave
Date published: 2015-11-13
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