MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017

Mustang Racing Technologies: 91U901
MSRP: $459.99
CJ's Low Price:
1477094400 59695
Add one of these parts to compliment your new Axle-Back Exhaust Kit!
CJ's Low Price:
CJ's Low Price:
CJ's Low Price:
Earn 399 RPM Points What's this?
MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017
MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017 MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017 Play MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017 Video 1
Mustang Racing Technologies

Product Description

MRT Stainless Steel KR Axle-Back Exhaust Kit with 4" Polished Exhaust Tips for all 2015, 2016 and 2017 GT Mustangs.

To anyone who knows MRT, “KR” is the hallmark of all-out performance. If you’re looking for that jaw-dropping, head-turning, ear-piercing sound on your 2015-2017 GT Mustang, then this is the Axle-Back Kit for you!

Features and Benefits:
- Loud, Aggressive Exhaust Note
- 304 Stainless Steel Construction
- CNC Mandrel Bent Tubing

- 4” Polished Stainless Steel Exhaust Tips
- Vastly Improved Exhaust Flow
- Substantially Lighter Than OEM Muffler
- Easy Bolt-On Installation
- Made in the USA

Designed and manufactured in Plymouth, Michigan, this muffler-delete Axle-Back Kit injects 100% raw American DNA directly into your Mustang’s veins. With a loud, aggressive exhaust note, these CNC mandrel bent 304 stainless steel pipes will not only improve your S550’s exhaust flow, but also save you a few pounds over OEM mufflers.

With an easy bolt-on installation, the KR Axle-Back Kit replaces your Mustang’s OEM mufflers for an intense, neck-breaking sound. With a perfect fit and finish, how could you say no to picking up these muffler deletes for your S550?!

If you're looking for the latest styling and performance parts for your Mustang, you have lots of major brands to choose from. However, few offer the same experience and proven results as MRT. CJ Pony Parts offers the latest styling and exhaust performance products from MRT, giving you lots of choices from one of the leading and most trusted retailers in the aftermarket. 

Order a MRT Stainless Steel KR Axle-Back Exhaust Kit with 4" Polished Exhaust Tips for your 2015-2017 GT Mustang from CJ Pony Parts today!

Similar Mustang Parts

similar Mustang parts More Axle Back Exhaust Kits  

Mustang Applications

This product will fit the following Ford Mustang years:

Product Reviews

Write a review
MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017 is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Loud and great fit I bought these w the MRT H pipe because no video had the two together w a sound clip. And wow. Blow ur ears away. True muscle car sound.
Date published: 2016-02-17
  • 2016-10-22T08:02CST
  • bvseo_cps, prod_bvrr, vn_cps_3.4.0
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_1
  • loc_en_US, sid_CBMR6, PRD, sort_relevancy
  • clientName_cjponyparts
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 198.29ms

Product Questions

Which is the louder Axle Back this or the Mishimoto 4.5" Axle back 

Asked by: iandb2b
They are both muffler deletes so the sound level should be extremely similar.
Answered by: CJPP Dave
Date published: 2016-10-19

if I buy from Canada do I have to pay duty

Asked by: jenna
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: rk cjpp
Date published: 2016-08-31

Is this legal for California? I hope so if it is ill get this and pair it with the H pipe...

Asked by: BillySAW951
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: rk cjpp
Date published: 2016-08-29

Would this fit V6?

Asked by: drugdealr
No, but this kit is specific for the V6 and Ecoboost.
Answered by: Rick CJs
Date published: 2016-08-26

I bought mine and I love them but I wanted to ask if these will go on the ecoboost 

Asked by: Mrrb172
No, the pipe diameter is too large for the Ecoboost.
Answered by: Rick CJs
Date published: 2016-08-25

I just bought your x pipe and I was wondering how it would sound with this axle back. Is there any way possible you can make a sound clip of that please?

Asked by: Andres526
It would be very loud.
Answered by: rk cjpp
Date published: 2016-02-18

Dose this axle back require a tune?

Asked by: Joshua
No, it does NOT require a tune.
Answered by: CJPP Dave
Date published: 2015-10-26

I currently have a MBRP street catback exhaust. I'm looking for something louder. Will this axle back be compatible with the MBRP h-pipe? 

Asked by: Svtmiguel178
We have not test fitted the MRT axle back with any other exhaust systems just the stock mid pipes.
Answered by: rk cjpp
Date published: 2015-10-06
  • 2016-10-22T08:22CST
  • bvseo_cps, prod_bvqa, vn_cps_3.4.0
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_10
  • loc_en_US, sid_CBMR6, PRD, sort_recentAnswersFirst
  • clientName_cjponyparts
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 155.99ms

You Might Also Like

Product Video

MRT Axle-Back Exhaust Kit KR Stainless Steel With 4" Polished Tips GT 2015-2017 Video Transcript
By Bill Tumas: If you've been watching our YouTube trying to determine what the loudest axle back you can find for you 2015 Mustang GT is. This might be the video you're looking for. This is MRT's KR series axle back fitting all 2015 Mustang GT's. The KR series from MRT is always their loudest, most aggressive sounding exhaust system and today we're going to install this axle back on my 2015 Mustang GT.

The KR series axle back from MRT is a T304 stainless steel high quality mandrel bent muffler delete. Features a set of four inch polished tips and like all axle backs, will require a cutting for installation. MRT includes both pipes and necessary clamps for install.

In case you somehow haven't heard one yet, here's some stock 2015 GT exhaust clips... Now let's get started with our MRT axle back.

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

The MRT is going to require you to cut in this neighborhood here, just like many other axle backs you've installed in a 2015 Mustang. The way they do it, is 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. Start the install, take the supplied clamp, put it over the factory pipe, start my putting the MRT exhaust up into the factory rear hanger. Line it up with the pipe and slide it over. Once the pipes in place, you can tighten down the clamp. Repeat the processing other side and your installation is finished.

Now let's see how our MRT KR axle back sounds... Nice deep tone at auto... Definitely loud and aggressive when you get on it...

The MRT KR series also has a very deep tone at auto. It's honestly not as deep as our receptor series, but it still has that kind of deep tone to it. Again, these are designed pretty much just to be... I mean it's wide open, it's a muffler delete so it's meant to be loud.

I'll be the first to admit, I didn't expect to like this. Usually my experience, as soon as we take the mufflers off, usually I'm getting a pretty bad tone out of it, but in this case, in fact we still have the factory resonator and the factory casts. Doesn't sound bad at all, actually sounds pretty good.

When you get on it, I bet it's loud. I got the window's up obviously which keeps the interior nicely insulated, but it's loud, you can definitely hear it, but it's not painful loud. It's loud kind of in a good way.

The whole tone is just... It's a different tone than a lot of systems we put on the car. A lot of them have a little bit of raspiness to it, but this is just... It's a deep tone to begin with and sounds going to cross the RPM but never gets that raspy tone a lot of the systems do.

When you get on it, you will hear more crackles and pops and when you're talking about a muffler delete, that's just going to happen. That's the sound you're going to get and there's a lot of people who like that. If that's the sound you're going for, this might be the one you want to consider.

All right, here we are cruising 2000 RPM's on the highway, the dreaded drones zone and yes you get a little drone out of these. I'm not going to lie. I've said before, when you get the mufflers with the deeper tone, often times the trade off is a little bit of a drone. In the case of these, yeah you're getting a deeper tone, but you've got no muffler to change your one. When you're cruising, you do get a little drone out of it.

As I said, this system has a nice loud aggressive sound. I can only imagine it with one of our resonator lead H-pipes or X-pipes on here. If you're looking for obnoxious, that might be the way to go.

MRT advertises the KR series as their loudest and most aggressive exhaust system, I'm going to say, it probably is one of the loudest one's we've heard on the 2015 as far as an axle back goes. Remember this still has the factory resonator. If you did the delete, I can only imagine how loud it would get then. Installations pretty straight forward. You do have to cut, the whole install will take you about an hours, be back on the road in no time.