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

Borla Cat-Back Exhaust System 2-1/2" S-Type Stainless Steel With 4" Polished Tips GT 2015-2017 is rated 4.9 out of 5 by 30.
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  • Easy Installation
  • 2-1/2" Mandrel Bent Piping
  • Polished 4" Angle Cut Tips
  • Straight Through Mufflers
MSRP $1,477.99
You save 11%

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

Even though you can tell there is a 5.0L V8 under the hood, the factory exhaust leaves something 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 quiet and tame it sounds. But…Borla has the solution!

Borla introduces their brand new S-Type Cat-Back system for all 2015-2017 GT Mustangs to help alleviate this issue. Manufactured entirely out of T-304 Stainless Steel, this 2-1/2" cat-back exhaust system will give you that perfect muscle car sound. This Borla Cat-Back exhaust system utilizes an integral X-pipe that will bolt directly up to your factory catalytic converters, 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.

Borla S-Type Cat-Back Exhaust System 140590 Features and Benefits:
- Easy Installation, Bolts Directly to Stock Catalytic Converters
- 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
- 30 lbs Lighter Than the Factory Cat-back System
- Utilizes an Integral X-Pipe 
- Reuses Stock Exhaust Hangers and Mounts
- Includes All Necessary Hardware and Instructions for Installation

*Fits BOTH Convertible and Fastback 2015-2017 GT Mustangs.

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 140590 Stainless Steel S-Type 2-1/2" Cat-Back Exhaust System 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 our YouTube channel probably knows we've installed a lot of different exhaust systems on my 2015 Mustang GT recently. We want to make sure that as a customer you can hear every possible option before you decide what exhaust you want to go with. I'm not going to lie. It works for me as well because that way I can hear the different systems, and it's not what I want to keep on my personal car. So far I have the 4 racing tour, which I'm a fan of, but a couple of the systems we installed I've definitely liked. One I've really been looking forward to though is the Borla S-Type. I've run Borla S-types on previous cars and always loved the tone of them. Today I'm going to install their Cat-Back on my 2015 Mustang GT.

Borla is made completely of high-quality T-304 stainless steel. It starts with a true x-pipe to replace your heavy resonator then goes for 2 1/2 inch Mandrel bend piping, through the Borla S-Type stainless steel mufflers, ending inside of their 4-inch polished double roll tips. We'll start off by giving you some stock sound clips then we get to install on our Borla.

For this installation we need a lift or a jack and jack stands, 3/8 ratchet, 13 mm shallow socket, 15 mm socket, 8 mm allen key, 6 inch extension, and a flat blade screwdriver.

What I've been showing you many times in the past, removal of the stock system is actually quite easy, but do suggest a second sets of hands to make it easier. First you want to do, remove the two bolts from the two rib brackets. Don't worry about removing the bolts. There's actually a little hook so they're not going to fall off. Now move forward and loosen the clamps that hold the resonator to the front pipes. I want to bend this tab up. There's a little stub that will stop it. They you can slide the clamp down. Now you can pop these little hangers off here. Now the weight's going to go forward, and you shimmy the system forward off the read clamps. We'll remove these clamps off the factory pipes.

First, we're going to install this factory clamps back on the factory pipes. Start by putting the Borla x-pipe into the stock clamp, I'm going to center the x-pipe and snug up these clamps. Don't tighten them all the way yet. You'll have to adjust them later.

Once the x-pipe's in place we'll move onto the intermediate pipes. Put a clamp on the front here and factory hanger on the back. Put it up into place. Same thing with the clamp here, just snug it up so you can still move it. Now, same thing with the muffler, install the clamp first, put it up on the factory hanger, tighten the clamp, now push it up where we want it. Check the fitting on the back and then tighten it down. Then repeat the process on the other side.

Once you're happy with the fit, we can tighten down the x-pipe clamps next to the factory piping. The last step, the factory hanger bolts. Your installation is finished. Now we'll see how it sounds with a Borla S-Type. The S-Type has a very signature sound. It has that aggressive raspiness. I know a lot of people were worried it was going to sound a lot like the Ford racing because Borla makes them. The S-Type has a completely unique tone.

I always liked the Borla S-Type on my previous Mustang. Absolutely love it on the 2015 as well. Like all Borla stuff, the fit and finish is top-notch and the sound is nice and aggressive yet really quiet when you cruise on the highway which is exactly what I was looking for. This system, I don't see me taking it off my car any time soon. Installation's straight forward. It's going to take you around an hour, so you'll be back on the road in no time. For more exhaust video options, make sure you check out our YouTube channel and check out for the best selection of 2015 exhausts.

Vehicle Fitment

This product will fit the following Mustang years:

Rated 5 out of 5 by from After it settles in, it is perfect I put on my Borla S-type... Which for the convertible DOES require one more step than the video install shows, which proved to be significantly more difficult. You must remove the convertible sub-frame, which has lock-tight on the bolts, which makes them possibly very hard to re-secure. But aside from install woes, it was a bit loud for the first ~200 miles, and a bit tinny, but once it settled in, this exhaust is great. Rather mild compared to some of the systems out there, but for me, that was what I was looking for. Sounds like American Muscle, but not enough so that the police will be looking for the source of the noise.
Date published: 2016-09-12
Rated 5 out of 5 by from Proper sound Not annoying loud but loud enough to get a cops attention. Zero drone, lots of pops and gargling sound when down shifting. Only gets loud when taking off at the light, but normal driving at low rpm it's a light rumble that you can still enjoy your radio.
Date published: 2015-04-30
Rated 5 out of 5 by from Incredible Sound! Great exhaust easy install. I wanted an exhaust that was loud but not insane loud. This exhaust gets loud after 3000 rpm and really loud after 4000 and really really loud after 5000. At normal driving 2000-3000 rpm it's 100% better than stock. It's not annoying and has a nice rumble. This exhaust makes it very easy to control the sound. It's definitely a head turner!
Date published: 2015-08-01
Rated 5 out of 5 by from Sounds amazing! The install took about an hour and it sounds great! I am beyond thrilled with this purchase. I've only had it on my car for a few days and I've already received several compliments on how great it sounds. I find myself running the rpms a little higher before I shift just to hear it! Big smile!!!
Date published: 2015-03-18
Rated 5 out of 5 by from Awesome Sound! I just put the Borla S-type cat back exhaust on my 2015 GT Convertible and the sound is awesome! It's very a very aggressive sound when on the gas and no drone on the highway. Every time I nail the gas it brings a smile to my face. BTW - This exhaust fits the convertible but you need to remove the bracing for the convertible to remove the mufflers.
Date published: 2015-08-03
Rated 5 out of 5 by from Borla Cat-Back Exhaust System 2-1/2" S-Type Well the fit and finish on the Borla S type is high caliber and the sound its great on short trips and blasts through the country,'s I bit louder than I had intended. I was wanting something a bit quitter than the Roush exhaust on my son's 2015, but the Borla's are LOUDER. I dynamatted the floor and trunk behind the rear seat in an attempt to quite it in the interior a bit. It was enough to take the edge off and make a 15 hour Road trip ok. I mighty be getting old...
Date published: 2015-09-02
Rated 5 out of 5 by from Does the job! Had my Performance shop guy install these plus an Airaid Cold Air Intake. Let me tell you..., great sound, great response when accelerating, turns heads, nice rumble, have to fight my wife just to drive my 50th anniversary 2015 GT! My guy says I'm probably getting a 5% gain in HP. I was happy with 2 or 3%. So from 435 to about 456. I'm thinking closer to a Boss at 444hp. But all that aside. It's upto debate unless you get on a dyno. I can hear and feel the difference. I'll let you know about gas Milage soon.
Date published: 2016-02-26
Rated 5 out of 5 by from Love it I’m very happy with the sound of this system. It’s loud when you want it to be but also quiet if you keep it around 2000RPM in a higher gear. I’ve had this on my car for 3 weeks. It has gotten a little tamer than the first day I had it on. It doesn’t crackle and pop as much but when you get on it the growl is absolutely incredible. I’d recommend this system to anyone who’s not trying to wake up the neighbors but also wants to turn heads when they get on the gas
Date published: 2019-09-23
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Can I purchase only the pipes from the H-Pipe over the axle to the axle back mufflers ? I already have an H-Pipe and the Borla mufflers !

Asked by: J Nellie
Sorry, we only offer it in a complete kit.
Answered by: rk cjpp
Date published: 2018-10-24

ive purchased this part and am now looking for some long tube headers that will fit and complement it perfectly. can you make any suggestions?

Asked by: s550chris
See P/N: HDAR51 and HDAR52
Answered by: CJPP Dave
Date published: 2018-05-29

Would this be compliant for an Australian s550 gt and what would the shipping be to Melbourne Aus

Asked by: stavros09
This will fit that vehicle, but does not include anything regarding Australian compliance.
Answered by: CJPP Dave
Date published: 2017-09-05

Is this California legal?

Asked by: Yellowbeestang
We don't keep track of the aftermarket part laws in any area, so we'd encourage you to check the list of official approved CARB parts here:
Answered by: CJPP Dave
Date published: 2017-08-14

Will i need a tune after installing this system?

Asked by: Sastang
No, this system is designed to work perfectly with the stock tune.
Answered by: AG@Borla
Date published: 2017-05-30

I have a 2016 Mustang GT 5.0 Premium automatic. My question is does the Borla S and ATAK Sound the same as it does on a 6 speed? Leaning toward the S Type but not sure if results would be the same as on the video.

Asked by: ronjake
The Borla S-Type and ATAK will sound the same no matter the the transmission of the vehicle.
Answered by: CJPP Dave
Date published: 2016-11-01

is this a 2.5 or a 3 inch exhaust?

Asked by: apple
Answered by: CJPP Dave
Date published: 2016-10-24

hello how much time to have this model in France thank you mustang gt 2016

Asked by: GAUTIER
Shipping time will be determined by which shipping options you select. To get a shipping quote and total price, add the item(s) to your shopping cart and then proceed to checkout. In checkout, fill out your address info and scroll down to see shipping options and costs to your area including any import taxes and duties.
Answered by: CJPP Dave
Date published: 2016-07-13
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