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

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MSRP $1,660.99
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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:

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