Roush Axle-Back Exhaust Stainless Steel GT 2015-2017

Roush Axle-Back Exhaust Stainless Steel GT 2015-2017 is rated 4.9 out of 5 by 115.
  • y_2020, m_7, d_12, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.10
  • cp_3, bvpage2n
  • co_hasreviews, tv_0, tr_115
  • loc_en_US, sid_CBR19, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_cjponyparts
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getAggregateRating, 151.28ms


  • 304 Stainless Steel
  • Mandrel Bent
  • Includes Clamps
  • Instructions Included
MSRP $754.00
You save $29.01

Roush Stainless Steel Axle-Back Exhaust for all 2015, 2016 and 2017 GT Mustangs.

The Roush stainless steel axle-back exhaust (P/N: 421834) is designed to fit all 2015-2017 GT Mustangs and will offer every owner the opportunity to install one of the most popular systems in the market today!

Roush’s stainless steel axle-back exhaust is the segment of your exhaust system that sits behind the rear axle, which is how it gets its name. It can even give you that classic muscle car roar that you’ve always wanted for your high-performance Mustang. This axle-back exhaust from Roush will offer your 2015-2017 Mustang GT a distinct and aggressive sound. The highly tuned system will avoid the annoying drone or rasp that can occur with other competitive exhaust systems on the market. Needless to say, you will love the unmistakable sound and efficiency of your quality, new exhaust.

Backed By Popular Opinion and High-Quality Results

Constructed from 304 Stainless Steel, this axle back exhaust system features an exclusive open-chambered design that will not deteriorate over time, unlike conventional fiberglass packing material. The round exhaust tips are also made from stainless steel and finished with a unique process that provides heat resistance to color change. Like all Roush products, installation is quick, easy, and uses all factory hanger locations. The only necessary modification to the vehicle is that the factory exhaust will need to be cut off so that the new Roush axle-back can easily install with the provided clamps.

When you buy this axle-back exhaust, you get more than just a dependable exhaust system.

Features and Benefits:
- Fills OEM Ford Rear Valance
- Zero Impact on Emission Devices
- Straight-Thru Design Yields Higher Airflow and Performance 
- Full 304 Stainless Steel Construction
- Includes Clamps and Installation Instructions

*Installation requires cutting of the factory exhaust piping. Once the modifications have been made to the factory exhaust system, Installation is a simple bolt-in procedure.

How well do you want your Mustang to look and perform? With any of the parts from Roush Performance, you can give it a major performance overhaul, and add some visual styling that will make your Mustang stand apart from the crowd. CJ Pony Parts is a Roush Top 10 Dealer and offers parts from Roush Performance for many different years of Mustang, many of which are in stock and ready to ship today.

Manufacturer Part Number: 421834

If you want a great exhaust that will improve the performance of your ride and give you that signature muscle car roar, then this Roush axle-back exhaust is for you. Plus, we offer all of our products at some of the lowest prices on the market so you can get the products you need in no time. Best of all, when you order before 5 PM EST, we can get your purchase on the road that same day, and we can almost always do it for free! Get the Roush Stainless Steel Axle-Back Exhaust for your 2015-2017 Mustang GT from CJ Pony Parts today!

California Residents: Proposition 65 Warning

Installation Difficulty


Novice skill is required for this installation.

Installation Videos

Video Transcript

The Roush axle back was one of the more popular systems for the 2011 through 2014 Coyotes, especially if you keep the rest of your exhaust system stock. It offered a very aggressive tone when on the throttle, but at highway speeds it was very tame and offered no drone at all. When Roush announced a similar system for the 2015 Mustang, we knew we had to get our hands on one, so today we're going to show you how to install one on your 2015 Mustang, and we'll provide you some sound clips.

Unlike the previous models, any axle back on the 2015 Mustang will require cutting, which actually isn't that big of a deal. The system comes with everything you need for installation, including the two mufflers, which are full stainless steel along with these two chrome four-inch tips. Before we get started with the installation, we're going to play you some sound clips of a factory 2015 GT exhaust.

For this installation, a lift or a jack and jack stands, half-inch ratchet or low torque electric half-inch impact gun, 15 millimeter socket, Sawzall, file, marker, and safety glasses. Like I said, with any axle back system, you're going to have to cut. Previous models would have clamps in this neighborhood, but in the case of the 15's, everything is welded. But cutting really is no big deal.

The instructions from Roush are very clear on where to cut, so you want to mark it over here. I'll explain where you're actually going to mark it and then you can cut it. The instructions provided by Roush tell you to cut the pipe closest to the tangent of the curve. If you're like me, you probably read more car magazines than paid attention in geometry class. I'll explain what the tangent is. What that is, is the closest straight line to the curve of the pipe. You want to follow the curve over and as soon as it gets to a straight section, that's roughly where you're going to cut. Do the same thing on both sides. To make sure you're in the right neighborhood, grab the Roush muffler. You're going to hold it up approximately where it's going to go. Then make sure this lines up with where you're going to cut.

Everything looks good, so we can cut the pipe. Since you'll need two hands to control the saw, if you don't have someone to hold the pipes for you, stuff some rags up in here. That way, it doesn't bounce up against your balance. Now we can slide the muffler off the factory hanger. Then you'll want to de-burr it before we put the new pipe on. First, slide the clamp over our muffler, make sure it's a spot where you can reach in to tighten it. I'm going to put it up into the hanger and slide it over the factory pipe. Now grab the supply tips that are fully adjustable in this case. Slide a clamp on, and make sure you get it where you want it. You can push it all the way down and bottom it out, but usually I like it a little bit better and pull it out a little bit. Go back and tighten everything down.

Roush recommends against using an air impact for this part of the job. Use a hand tool or, like I said, I have a low torque impact gun, which is electric which will work fine. I'm going to repeat the process on the other side. All right, it fits great. Let's see how it sounds. It sounds killer. It's the same aggressive sound we got from the older Roush system. Sounds just as good on the 15.

Inside the car, the tone is very similar to the 11 through 14. It has that same kind of aggressive sound to it, but it's quieter. I actually don't think the exhaust is quieter. It's just that the 15 is actually much quieter inside so I think it's deadening a lot of the sound out. When you're at highway speeds, we're doing 65 right now, you can't even hear it. No drone, no nothing at all. You downshift, get on it though, it has that nice aggressive sound we're used to from Roush mufflers.

That Roush sound that was so popular with 11 through 14 is alive and well for the 15 too. It sounds nice and aggressive when you get on it, but on the highway it's real mild and no drone whatsoever. Installation is also pretty straightforward. Probably take you only around an hour. For the best selection of 2015 Mustang parts, make sure you check out For more install videos like this, make sure you subscribe to our YouTube channel.

Vehicle Fitment

This product will fit the following Mustang years:

Rated 5 out of 5 by from Awesome! Easy purchase. Fast shipping. Easy install, only took about 30 minutes and sounds awesome! Very pleased!
Date published: 2015-10-22
Rated 5 out of 5 by from Greatest Chrome in town !!!!!!!! These are better than last years. The sound is still that great Roush sound with no resonance at 60 mph
Date published: 2015-03-06
Rated 5 out of 5 by from Amazing sound fast install! Took me literally 20 minutes tops to install the axle back. And oh boy does she sound mean!
Date published: 2015-08-21
Rated 5 out of 5 by from Easy to install and great sound I installed this with the x pipe as well. My neighbors now all know that I have mustang!!!
Date published: 2015-08-01
Rated 5 out of 5 by from Sounds amazing My Mustang GT finally sounds like a Mustang GT! Great sounding but not too loud.
Date published: 2015-08-01
Rated 5 out of 5 by from YES!!! Love it, makes my 2015 GT sound like it's supposed to!
Date published: 2015-05-19
Rated 5 out of 5 by from Installed with MHT H-pipe I installed the MRT H-pipe with the Roush Axelback exhaust, these two put together make your exhaust extremely loud. It sounds great but it is freaking loud, there is very slight drone which I wouldn't concern yourself with, the mufflers are so loud they resonate into the cars interior, but that's the nature of the beast. The tone and rumble from the H-pipe are superb, I compare this setup to others I see and hear on the road, I grin every time and say to myself "mine sound better". WOT sound in unbelievable, I lost some low end torque but gained it on the high side, that was a trade off which was worth it, it breaths so much better without all that back pressure makes shifting much better, your able to run through gears quicker and easier with less bucking. What I mean is when you press the clutch in to shift the car its still lunging forward instead slowing down waiting for the next gear, I love this. Though its loud the performance is through the roof, gonna throw some dynamat in the trunk. Upgrade was totally worth it, if you don't what so loud I would try the Roush Exhaust first, then add the H-pipe, but the pipe is what changed the way the car rumbled which I love. Finally the fit and quality was superb, no fitment issues at all, no bending, tweaking, it was a perfect fit, quality was excellent and CJ pony us the best.
Date published: 2017-02-25
Rated 4 out of 5 by from Great sound To start off i would give these a 5 star but after i had the about 6 months one of the mufflers came apart internally. After talking with CJ pony parts they didnt cover it under warranty cause it had been to long. But when i talked to roush they said it was no problem and sent me a new one and it was delivered within 3 days. Other than that it a great product and turns head everywhere i go. I have in combined with a x pipe also.
Date published: 2016-08-26
Rated 5 out of 5 by from Easy install, great sound and great deal... Love the system. The install on my 2016 GT premium was pretty easy but I definitely had to cut a little more on the left side to get the tip centered in the valance outlet. Love the sound...I have no other exhaust mods and this is loud enough for me and you can't hear it at cruise speeds. One of the best deals out there and CJ had the best price plus free shipping and no sales tax. Very happy with my purchase.
Date published: 2016-07-20
Rated 5 out of 5 by from Roush Axle Back Ordered this Roush exhuast about 6 days ago and it just came in today & installed it ASAP !! It is loud & aggresive !! I recommend this Roush Axle Back 100% It's one of the best Axle backs !!! The aggressiveness is just so amazing !! People just break there necks when I rev it & all my friends were giving me good compliments when they heard that V8 5.0 Rumble !!! Thank you so much CJ Pony Parts !!!
Date published: 2016-09-13
Rated 5 out of 5 by from Honest Review! I just recently purchased this exhaust along with the MRT H-Pipe. I am extremely impressed! I don't care what video's you search for on youtube or you see here on CJ's, the videos DO NOT do justice for what these exhaust sound like, especially with that H-Pipe attached to it. I originally wanted to go with Corsa's at first, but I'm glad I went this route instead. So, for drone!?!? Truthfully, even cruising around town on small hills, oh yes there is drone. But to my ears, its not to overpowering but at moments it can be. Again, I'm not just reviewing this exhaust, I'm also talking about having that H-Pipe connected as well. As for drone on the highway, you can barely hear it, unless you give it a little gas. To conclude, I am 100% happy with this set up and these exhaust. I would recommend these over paying out $1000 for something else. I'm sure here soon my neighbors will begin to hate me, haha!
Date published: 2017-09-19
Rated 5 out of 5 by from Axle backs are great. I bought the axle back to see if they would give the level I was looking for. They are just right for me. It's possible that I do the h pipe after while, but for now I'm very happy. Very simple to install, I used a floor jack and stand, saw zaw and did one side at a time. Took longer to get the tools out and then put back up than it did to change the mufflers. I would recommend them!
Date published: 2015-09-25
Rated 5 out of 5 by from Now it sounds like it should!!! I was not satisfied with the refined, subdued sound of the factory exhaust on my 2016 GT - I wanted a quiet car at cruising speed and a sports car sound at higher RPMs. After lots of research, I purchased this Roush axle back and man am I glad I did. It's the perfect combination of quiet when you want it and race car sounds when you rev it. It's not track-loud (which is obnoxious to the neighbors) but it's loud enough to turn heads as you are driving down the street. I bought this 2016 GT manual transmission to drive on weekends for "stress relief" and now I'm looking for excuses to drive it all week long. Buy this if you want that true Mustang sound - best money I've spent so far on an upgrade for my 2016 GT. And to top it off, I installed it myself in the time it took me to finish one cigar (about 30 minutes) with simple ramps, a jack, a sawzall, and a socket wrench - no professional inatallation required!
Date published: 2016-05-13
Rated 5 out of 5 by from Easy installation !! Bought this product on a Thursday it was shipped out and I had it by Friday morning. Look online for coupons it practically paid for my overnight shipping. Installation was easy as 1-2-3 you can literally be done in less than an hour you can literally be done in less than an hour. Watch the video if you're not mechanically inclined and you will still have no problem .
Date published: 2017-05-13
Rated 5 out of 5 by from 2016 mustang GT first upgrade N I C E!!!. Okay I own a 2016 mustang GT conv C/S. The car had like 800 miles on it when i decided to get the Roush axle backs. First, I thought hard on it as I have paid for a service policy. Roush is a licensed provider for Ford so i felt safest going with Roush above all other makes of axle backs. Secondly, the quality is better than OE and couldn't be nicer. The sound is actually very nice and deep. This exhaust is smooth on idle but will roar when you " hit it". Any louder creates too much attention for me and the growl was really important vs the Euro rasp. I'm a mature driver but had to have my muscle car sound like a muscle car. This did the trick and would recommend starting here with Roush axle backs (very safe) and continue to upgrade with a resonator delete pipe but not sure they are service contract friendly because you are deleting something that was placed by manufacture and affect the policy. Cheers
Date published: 2016-09-22
Rated 5 out of 5 by from Addicting exhaust note!! Perfect mustang exhaust I love my 17 gt except for the stock exhaust. I understand that these cars are now a worldwide production models and are sold all over the world. I understand that there's places in the world with very strict emissions and sound regulations but the stock exhaust is too quiet. It chokes and quiets the beautiful naturally aspirated coyote v8. Why buy a v8 mustang if you want it to be as quiet as a European car. It came down to corsa extreme or the roush axleback. Did not want to spend over double the price for the corsa. I'm glad I didn't. That exhaust is super loud. The roush has a perfect tone. The car now has that classic mustang v8 rumble at idle. I live in an apartment complex and although it sounds a little loud it's not super loud. My car is a daily driver and there's no drone. V8 sound track with the windows up and not annoying. You want louder, put the windows down and it sounds tastefully loud. Floor it and oh boy watch out! Nothing that will hurt your ears or give you a headache like some of my previous cars. IF YOURE LOOKING FOR AN EXHAUST THAT ITS NOT SUPER LOUD BUT NOT QUIET THIS IS IT. Tastefully loud. adding an x pipe will just make it extremely loud. The car now sounds like a mustang should and it's very tolerable for a daily driver. Best part of the day is getting in that mustang and starting it up. You might experience a drop in mpg but that's because the sound is amazing and you want to open it up every chance you get when you feel like it. Sounds very mean and aggressive at full throttle. The install was failrly simple. The hardest part was cutting the exhaust pipes. I recommend a reprocicating saw from harbor freight tools and a filler and a marker. I got my saw for $20 and the blades for $6!!. Shops wanted anywhere from $80-$150 for install. What a rip off. I rather save that money for other mods and make sure it's done right. I DID IT IN MY APARTMENT PARKING LOT ON RAMPS AT NIGHT IN 25 degree weather. Anyone can install these as long as you follow the instructions. After the pipes are cut then it's just bolting on and that's it. No video will do this axleback justice. I've been watching videos of the roush axleback for years before getting my mustang and I was just speechless when I first started it up and took it out for a drive. The sound in person is amazing. Don't believe me. You can do it like I did. Buy the roush and if it's not loud enough for you then put an x pipe or h pipe after. For me it's plenty and the Perfect blend between a race set up and a quiet exhaust. Not race loud but by all means not a quiet set up. No drone.
Date published: 2017-02-02
Rated 5 out of 5 by from If you want LOUD, this is the exhaust for you. Bought my 2015 GT with the Ford x-pipe and stock mufflers. After a few weeks decided I wanted a more aggressive sound so I decided to install these Roush mufflers. Aggressive is an understatement! These mufflers are loud. I know the x-pipe does and will make them louder and I am in no means complaining, my muscle car now sounds as aggressive as it looks.
Date published: 2016-09-20
Rated 5 out of 5 by from Raw in your face aggresive I bought the Roush axle backs and non res X-pipe at the same time. Sound is truely aggresive. Sounds great but not as deep as i was hoping for. With a non resonated xpipe it is very raspy. Sounds killer when you are nailing the throttle!! The neighbors probably dont like it in the morning though... Sounds better than the Flowmasters that were on there.
Date published: 2019-01-13
Rated 5 out of 5 by from Amazing sound and great quality. I ordered online on Thursday evening and had them on the Monday. Fitted in an hour. What a transformation ! Lovely bass V8 rumble that becomes a roar at 4000 rpm whilst being no louder than stock at motorway speeds in 6th. No drone, just sounds like the car should have done from the factory. Seriously impressed. Thankyou Roush.
Date published: 2016-07-26
Rated 5 out of 5 by from Fantastic Sound Received the Roush Axel backs promptly and then had them installed by a professional. Took all of 30 minutes. I'm running the Ford Racing X pipe resonator delete, and yes it is loud but has a deep exhaust note. There is absolutely no drone with this combination. The Roush Axel backs are the best sounding mufflers ever.
Date published: 2016-03-27
Rated 5 out of 5 by from My Review I bought this part of CJPony delivery was quick and efficient and the build quality on this axle back is as expected from Roush AMAZING!! The installation was a breeze and the sound this gives is out of this world. I was getting sick of the stock exhaust on my 15 GT but now i just cant wait to get in it and drive.
Date published: 2016-04-20
Rated 5 out of 5 by from Vrooooom Added it to my 15 GT with a Ford racing X pipe .... very nice . I had the X pipe welded on like 6 months ago .. but the Roush axel backs I did my self .. very easy .. backed up on car ramps . Cut in the right spot with a saws all (do NOT use anything else) LOOKS GREAT !!! Sounds AWESOME !!!!
Date published: 2016-12-30
Rated 5 out of 5 by from 2017 GT I originally purchased MBRP Race cat back it sounded ok but I wanted a​ more aggressive sound with less drone. What I did was pair the 3in H-PIPE from MBRP with the Roush axle back. It took some creativity to get it to line up but the results were so worth it! Exactly what I was going for!
Date published: 2017-05-25
Rated 5 out of 5 by from great sound! i did some research on a number of manufacturers, but kept coming back to roush. this exhaust was exactly what I was looking for. no drone while cruising, but it wakes up when you get on it. very solid sound. very easy to install, took about an hour. rousch makes a very solid product
Date published: 2015-09-23
Rated 5 out of 5 by from Affordable package, tremendous sound. Initially had my doubts for the roush axelback as it looked so small compared to other systems. But once it got on the car. Wow its a whole new beasty sound. Very clean and aggressive sound. Cj pony also delivered it super fast. Even for international orders.
Date published: 2017-03-08
Rated 5 out of 5 by from Sounds great. Got this installed a couple weeks ago. The polished exhaust tips look great, much better than the full grey stock tips. It sounds fantastic, not too loud at idle or cruising speeds, but roars when I get on it. Finally my Mustang sounds like a muscle car should!
Date published: 2016-01-26
Rated 5 out of 5 by from Sounds great. Great sound no drone. Installed by myself in less than a hour. Best exhaust sound I've heard yet. Roush hi quality stainless steel exhaust with highly polish tips that looks great coming out of the back of my 2016 GGT/CS.
Date published: 2016-11-17
Rated 5 out of 5 by from Nice, balanced sound.. I had my Ford dealer install this on my 2017 Mustang GT w/Performance Pkg..It sounds really good-not too loud. not too quiet-just about right..Also, the 4" Roush exhaust tips look a lot better than the factory 3" ones...
Date published: 2017-03-29
Rated 5 out of 5 by from Great system I bought this exhaust about a month ago and I love the way it sounds, and I feel a little bump in horsepower. this system is loud but not crazy loud.No drone at all. The sound stays outside the car just what I wanted.
Date published: 2015-12-12
Rated 5 out of 5 by from Blown away Switched from the stock exhaust to this and the cj pony parts h pipe, very simple installation with 0 mechanical knowledge. The videos online don't even come close to capturing how good this sounds. Thank you cjpp
Date published: 2018-04-05
  • y_2020, m_7, d_12, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.10
  • cp_3, bvpage2n
  • co_hasreviews, tv_0, tr_115
  • loc_en_US, sid_CBR19, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_cjponyparts
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getReviews, 5.78ms

Hi Guys, I'm in South Australia, have ordered Mustang GT 2017 model. Really impressed with your clips and reviews.. will their be any changes to fit the new model? ..and any expected huge price difference? DP

Asked by: DionP
Nothing major is expected to change.
Answered by: CJPP Dave
Date published: 2016-06-23

$549.99 is that US dollars or Aussie dollars, How much is freight to Sydney australia

Asked by: Conf
US Dollars. 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: 2016-06-29

What is the difference between combining this with a resonator delete H pipe, versus a full cat back exhaust kit like the MagnaFlow Stainless Steel 3" Street Series Cat-Back Exhaust Kit?

Asked by: nogoodname316
Mainly price. A full cat-back will replace everything without modifications, where as a resonator delete with an axle-back combo will require you to reuse a small portion of your piping between the two pieces and require you to make 2 sets of cuts. The Roush Axle-Back with a Resonator Delete will also be much louder then the Magnaflow Street Cat-Back.
Answered by: CJPP Dave
Date published: 2016-05-17

axle back for Australian Mustang GT 2016, freight price to Australia please

Asked by: mustang62
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: 2016-05-09

do I need to get the car tuned at dealer after install of roush axle back mufflers?

Asked by: Punch
No you will not need a tune.
Answered by: rk cjpp
Date published: 2017-01-27

Is there a lot of difference in the sound of the Roush exhaust vs the Borla? Does all Roush produce the back pressure sound when shifting? That little rubble??

Asked by: B78B
I would suggest listening to the sound clips for each axle back at the bottom of the parts description.
Answered by: rk cjpp
Date published: 2016-04-22

Can I put this on a 2015GT convertible ?

Asked by: jdub51
Answered by: CJPP Dave
Date published: 2016-04-20

What is the air freight shipping time and cost to Melbourne Australia for 2015 Mustang Roush axle back exhaust kit. Ie single tip each side?

Asked by: Banshee
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: 2016-04-19

Hi I am buying the following items to ship to another country however I need the shipping size and weight of the items in order to get a quote from the agency. The items are the following: Roush: 421834 / Mustang Racing Technologies: HPMR1

Asked by: byronf
The HPMR1 is 11.4 pounds, 4.25 inches high, 6 inches wide, 36.75 long. The 421834 is 27 pounds, 11 inches high, 21 inches wide and 24 inches long.
Answered by: rk cjpp
Date published: 2016-04-01

If i have a ford racing sport catback installed already can i unclamp the ford racing axle back and install the roush or are these to short to mate with the ford mid pipe?

Asked by: Jims2015
You should be ok with swapping these mufflers.
Answered by: rk cjpp
Date published: 2016-03-31

How would you compare the loudness and tone from this to the MBRP Street? I have the Street installed, and it sounds great, but I'm thinking I want something a little louder and deeper tone when accelerating. 

Asked by: MagGT
We have videos of both exhaust systems installed so that you can form your own opinion.
Answered by: CJPP Dave
Date published: 2016-03-31

Is the American exhaust pipe diameter the same like European? It's about Mustang GT 2015. Thanks in advance.

Asked by: Avenger
Yes it would be the same.
Answered by: rk cjpp
Date published: 2016-03-28

If I were to buy the quad tip valance but also buy this specific axle-back and separate quad tips, would they align properly into the valance? I am asklng purely for budgetary reasons.

Asked by: clarkage94
Unfortunately I would not be able to give you a definite answer if it would work or not.
Answered by: rk cjpp
Date published: 2016-03-17

What do you think is better the roush axel back or the Mbrp aluminized race series?

Asked by: Jvstin27
The MBRP will replace the the stock resonator where the Roush axle back will use the stock resonator and pipes, The MBRP will be louder than the Roush axle back.
Answered by: rk cjpp
Date published: 2016-03-09

Is this system legal in the UK? Does it require disclosure to your insurance company?.

Asked by: tmoacr
We do not keep track of that information unless it is specifically provided to us by the manufacturer.
Answered by: CJPP Dave
Date published: 2016-03-07

Hi there  Do you have an outlet or ship to the UK and is the kit compatible with a UK spec GT Mustang?

Asked by: rtmills1
We ship worldwide. Although we have not tested the fitment on a UK spec GT, others have made these fit with no issues.
Answered by: CJPP Dave
Date published: 2016-02-26

Hi I' have a 2015 mustang  are these roush exhaust. Are easy to assemble 

Asked by: Marcel Leone
They just require cutting the stock exhaust, its a pretty simple installation.
Answered by: rk cjpp
Date published: 2016-02-15

Could I have this product with black tips? I have seen it in some differents webs but they don't sell it out of US. Thanks in advance!

Asked by: Alvar8
We do not have them with black tips.
Answered by: rk cjpp
Date published: 2016-01-14

Is there a xpipe or hpipe that will bolt on with this axle back that doesn't involve any cutting just strait on and off 

Asked by: midnightriderd
They all require cutting.
Answered by: rk cjpp
Date published: 2016-01-13

Concerning a 2016 Mustang GT: Will the addition of a Roush Axle Back exhaust require or benefit from a custom tune? Will you offer a discount if I purchase the Roush Axel Back Exhaust, JLT Cold Air Intake and SCT X4 together as a package? Thanks,TU

Asked by: DL468
These do not require a tune, but your car will always benefit from having one regardless of modifications.
Answered by: CJPP Dave
Date published: 2016-01-08

Hi how much to ship the Roush Axle Back #421834 to Australia post code 5051. Thanks Dave

Asked by: Catback
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: 2016-01-08

Could you please quote a price for the Roush axle back exhaust system (two, cut & bolt on rear st. steel mufflers) for the Mustang GT 2015 - 2016, part no: 421834 ??? delivered to Sydney Australia or maybe you have a supplier in Australia.   Regards  Paul

Asked by: Paul Mac
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: 2015-12-07

Do the instructions include measurements for cutting the factory exhaust? Thanks.

Asked by: Diesel91
They do not provide exact measurements but they show you where you will need to cut, it's pretty straight forward. You can view the instructions by using the link that is located under where it says "Installation Instructions". Also, please watch our installation video to get a better idea of how easy the install actually is.
Answered by: CJPP Dave
Date published: 2015-12-03

Is there any difference in tone between the single tip version and the quad tip, or is the price difference between the two purely a reflection of the aesthetic difference?

Asked by: Mxm2450
With the quad tip mufflers the outside tips are open and free-flowing all the time and the inner two tips are bolted onto the muffler with a removable block-off plate that is pre-installed from Roush to limit sound and flow. The end user can easily remove this plate in a matter of minutes to reap the full benefits of both sound and performance from their new quad tip Roush mufflers. The quad tip mufflers requires the quad tip valance.
Answered by: rk cjpp
Date published: 2016-01-08

I am interested in improving the sound of my 2015  GT however I don't want something to aggressive. I think an axle back might be the best choice but I'm concerned about drone. Will the roush system drone at low RPM? 

Asked by: Chris88
The Roush Axle-Back sounds like a perfect option for you then. We have not hand any first hand issues with Roush regarding drone. They have always been a great all around option. Loud when you want it to be, nut also tame when you need it to be. You will not be disappointed.
Answered by: CJPP Dave
Date published: 2015-12-27

I just changed my stock cold air intake with an Airaid . Now I just ordered the Roush axelback Mufflers. Should I do a Customer Tone or leave it?

Asked by: Mustang Knutt
You could just leave it but you will get an increase in power with a custom tune.
Answered by: rk cjpp
Date published: 2015-10-14

hi i wish to purchase the Roush Axle Back Exhaust for my 2015 GT Right Hand Drive Ford Mustang, could you please tell me the cost of the exhaust, and how much it would cost to ship to England, United Kingdom, thank you.

Asked by: stevie p
Cost is in big red numbers on the righthand side of the product page. To get a shipping quote, add it to your shopping cart and head to checkout. In checkout, fill out your address info and scroll down to see shipping options and costs to your area.
Answered by: CJ Pony Parts
Date published: 2015-10-07

How is the drone? I want something that doesn't drone at all inside. I am considering this axle back system or just switching the resonator with an H pipe and keeping the factory mufflers. I have read a few reviews that say no drone. 

Asked by: jamesdent87
Listen to the video sound clips that we offer on our website. That will give you a great idea of what it sounds like and whether there is any drone.
Answered by: CJ Pony Parts
Date published: 2015-09-08

Will this axle-back work on a 2016 GT convertible?

Asked by: Opnyd
Yes, it's listed as fitting that model.
Answered by: CJ Pony Parts
Date published: 2015-09-02

Which do u think is louder roush exhaust with the mrt resonator delete or the borla atak exhaust 

Asked by: Ferris
Listen to our sound clips on both to get a good idea of the volume.
Answered by: CJ Pony Parts
Date published: 2017-11-09
  • y_2020, m_7, d_12, h_15CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.10
  • cp_3, bvpage2n
  • co_hasquestionsanswers, tq_93
  • loc_en_US, sid_CBR19, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_cjponyparts
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 165.04ms