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MBRP Installer Series Axle-Back Exhaust (11-14 GT)

Item 383700
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      Review & Installation Video

      So MBRP's Pro-Series that we've got here today is gonna be a good option for any Coyote owner out there that wants to improve their exhaust note without getting too loud, and without too much drone, all while not burning a hole in your pocket. Now axle-backs for the '11 through '14 are gonna install with little to no effort at all. For that, you are looking at a very straightforward one outta three wrenches on a difficult meter here, about an hour's worth of wrenching, and I will show you how coming up soon. So right out of the box, guys, what you just heard is definitely gonna be on the quieter side of the spectrum here. And I'm gonna be giving this a one outta five on the loud or the wake the anybody scale here. These mufflers will ditch your heavy factory setup for another chambered style muffler, but one that's gonna be giving you a slight bump in tone and volume over your factory cans, while shading about 15 pounds off the back of your car. Now with that said, this quieter axle-back is still a huge improvement over the factory muffler, as those stockers just don't do the Coyote and justice, and let's face it, honestly just make any Mustang sound like any of the car out there on the road today. So if you like the relative volume of your stock system, you like the cabins pretty quiet and livable, but you wanna make the motor actually sound like it's supposed to, these are gonna be perfect for you. And these are gonna give you a marginally decibel level increase, while not creating too much drone, you are still gonna be able to have a conversation in the car and enjoy the long drives. But from sound to steel here, guys, the Pro-Series is made out of a three inch aluminized stainless steel tubing, which is considered entry-level in terms of the materials. And that's directly going to affect how affordable this system is. Now it's worth pointing out that if you're on the coast, somewhere where your're gonna be seeing snow a little bit more often than not, or if you're just in a wet part of the country, aluminized steel may not be the best material in terms of resisting corrosion. Now it's gonna be inherent that any exhaust system is gonna discolor or rust over time. And this is something that will likely turn a little bit faster than stainless. But with that said, it's really not gonna be visible as it's gonna be under the car, and it's really not something that will keep me up in the middle of the night. But where it counts here, you are gonna be getting a very nice polished set of 304 stainless steel tips, and they're always gonna look great, they're not gonna rust or corrode, and they will polish up nicely. Additionally, they are gonna be etched with MBRP's logo, which is a nice little touch too. On the flip side here though, if you are overly concerned about that finish under the car, MBRP's stainless series will yield that same exhaust sound as it's gonna come with the same mufflers, but the build quality is gonna be 304 stainless, and expect to be spending over 500 bucks to get into those. So for the money here, I think it's very aggressively priced for what it is. And if you're the owner that's after a slight bump in volume and tone, but looking around at the same price range, you are gonna see there are other options from Heartthrob and pipes, which are gonna be , they will inherently be louder, but the materials are gonna be slightly better. At the end of the day here, guys, it's ultimately gonna come down in sound that you are after and what you wanna spend, though. But installation wise, like I said earlier, axle-backs are really a piece of cake. They install in under an hour with basic hand tools. And for that, it is gonna warrant an easy one outta three wrenches on our difficulty meter here. Now some tools for the job are gonna call for a pair of jack stands, a basic socket set, a ratchet, pry bar, Channellock pliers, and some WD-40 or any type of spray lube to hit your hangers. So you wanna begin by loosening up the clamps connecting the exhaust pipe to the muffler, and then move the muffler lose from the over axle pipe. Once that's done, guys, it's really just gonna be a matter of getting your MBRPs in place, clamping everything down, clamping your tips down, giving your work a good once over, and then you are ready to make some noise. So that's gonna wrap up my quick review with MBRP's Pro-Series Axle-Back, fitting the 2011 through 2014 Mustang GT, that can be found right here at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Rich, Mellow Exhaust Note
      • High Flow Mufflers
      • Bolt-On Installation
      • 3" Aluminized Steel Tubing
      • 4" Polished Stainless Steel Tips
      • Fits 2011-2014 GT and BOSS Mustangs


      Rich, Mellow Exhaust Note. Give your modern S197 5.0 Mustang that rich, mellow exhaust note of a classic muscle car with the addition of a MBRP Aluminized Axle-back Exhaust System. It has been specifically tuned to give you the optimum sound for your 5.0L GT or BOSS 302 Mustang.

      Durable Aluminized Steel Construction. Constructed from 3" diameter aluminized steel tubing for strength and corrosion resistance, this MBRP Axle-Back Exhaust features (2) high flow mufflers that end with 4" polished 304 stainless steel slant cut exhaust tips. As an added bonus, the tips are etched with the "MBRP" logo for true custom styling.

      Direct Bolt-On Installation. Engineered to be a direct upgrade replacement for your Mustang's factory rear axle-back exhaust, the MBRP Axle-Back Exhaust Kit easily bolts up in the stock location with no modifications required.

      Application. This MBRP Aluminized Axle-back Exhaust System is specifically designed to fit the 2011 to 2014 GT and BOSS Mustangs.

      Fitment: 2011 2012 2013 2014 Details

      MPN# S7224AL

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (37)

      Write a Review

      Ratings Summary

      4.4 out of 5 overall rating from 37 customers

      Installation Time: Afternoon

      Installation Cost: 0-$100

      • September 16, 2019

        4 2012 V6 - Avery044 Installation Time: Afternoon

        Fantastic and Annoying

        Installation: It's very easy to put this pair of mufflers on my cars. It only spent me half hours including adjustment. However, it was extremely difficult to take the stock mufflers out. I might do it incorrectly. There were just not enough space to move the mufflers for taking the hangers out of the rubber mounts. For completing the work, I had to loose the swaybar to gain extra 2 inches. If you have the right tools to separate the hangers from the mounts without moving the muffler around, it should also be done in a half hours. Performance: When the engine is idling, my V6 sounds like an old carbutor V8. You can hear the explosion from the combustion chambers. Also when you reach 4k RPM, it sounds really seriously. For this two points, I give it 5 stars. Issues: It drones. I'm not sure about other 3.7 Mustang. On my 2012 V6, it drones on highway, but it drones less than the Flowmaster Axle back I used to own. I'm okay for drive it for 10 hours, but it will be a very uncomfortable trip. The only way to get away from the drone is when I release the gas. Once you put foot on the gas before you pass 4k RPM, it sounds as ricer as most of after market mufflers. For this two points, it loses one stars.

        Helpful (0)
      • July 08, 2019

        5 2013 GT - RoutsYay Installation Time: Afternoon

        Great Classic Performance Sound

        The box these mufflers came in was in perfect condition. Inside, the mufflers were well padded and the stainless tips were boxed separately inside. Overall condition of everything was as close to perfect as could be expected. I decided on the aluminized vs fully stainless as my car is a summer only vehicle and spends most days in a garage. That being said, I did fully paint my set with VHT header paint. It was super easy to do and should provide a bit more protection to extend life of the product. Be sure to fully clean the exhaust first with brake cleaner and rub down fully before painting. Also, follow the paint instructions carefully so it cures. Now for the sound, it is nothing less than terrific. These produce a deep, bass sound like a classic muscle car. You can hear them under acceleration but they aren't overly loud and annoying. I find that many exhausts for the Coyote engine are too high and raspy. These produce a powerful sound and are much more aggressive than stock. On the highway you can certainly hear them but they don't have an annoying drone. Overall, I couldn't be happier with this purchase. Great bang for the buck sound and looks improvement.

        Helpful (0)
      • March 25, 2019

        4 2012 GT - DANP Installation Time: Less than 1 Hour

        MBRP Installer Series Axle-back Exhaust

        MBRP Installer Series Axle-back Exhaust I did read all reviews before making the purchase. I was looking to make my car a little quieter and this seemed to be the direction to go, according several reviews with similar set ups. My current exhaust set up is - JBA long tube headers, H pipe, no cats, full 3 inch cut and welded around the rear end. I had Flowmaster Outlaw mufflers on first. My car was ridiculously loud, the cops and neighbors could hear me coming from miles away. I decided to tone it down a bit with the MBRP’s and it definitely did the trick. It’s still plenty loud and has a real good tone to it. If I had stock exhaust and was looking to make my car louder, I would have probably chose a different muffler. I would have given the MBRP’s 5 stars, but they didn’t include new clamps with the kit. I wish they would have, because I snapped a bolt taking one of the clamps off. I have also noticed a small amount of surface rust on one of the welds after only a few week. All and all a good muffler for the price.

        Helpful (2)
      • January 20, 2019

        5 2014 GT - RichardF Installation Time: Less than 1 Hour

        Nice Axlebacks

        Perfect sound! Not too loud, not too quiet, the right amount of rumble to let you know this is a 5.0. Very pleased. Now, as for the was a bear getting the stock isolators off the factory mounts, but a little WD40 did the trick. Worth the effort to have a far better sound than stock, but not obnoxiously loud or droning.

        Helpful (3)
      • December 01, 2018

        4 2014 GT - CHill Installation Time: Afternoon

        Sounds like a Mustang Should

        Not the best fit (had to bend the hangers on the driver's side and it's still a little low), but installed fairly easily, and it sounds GREAT! Just like a Mustang should. I literally smile at every stop light.

        Helpful (3)
      • November 11, 2018

        5 2011 GT - Vince Installation Time: Less than 1 Hour

        Couldnt be more pleased!

        Perfect balance! Rasp is there when you want it, and not when you dont!

        Helpful (3)
      • September 03, 2018

        5 2012 GT - DouglasK

        A best buy

        I bought this because I wanted to get rid of the factory heavy mufflers, more aggressive sound, and spend as little as possible. This axle back worked perfectly and looks nice also. I had the old out and this system in in a little over an hour on the driveway.

        Helpful (4)
      • August 29, 2018

        5 2012 GT - Roxanne2012GT Installation Time: Less than 1 Hour

        Solid Budget Exhaust

        I've got 150k miles on my '12 GT and wasn't looking to spend a lot to get a deeper rumble out of Coyote engine. The MBRP Installer sounds great at a very reasonable price, I'm thrilled.

        Helpful (3)
      • July 25, 2018

        3 2014 GT - EthanS

        Axle backs

        Not entirely happy with the purchase I made with the installer series by mbrp. Not the sound I was looking for. Next time i will get roush axle backs. Thanks

        Helpful (4)
      • July 23, 2018

        5 2011 GT - Jim Installation Time: Less than 1 Hour

        Just the right noise level

        I used to have pipebombs, which were obnoxiously loud, but I wanted something less noisy. These sound better than stock, without being obnoxious, and there is no drone anymore.

        Helpful (4)

      Questions & Answers (6 answers)

      5 Top Rated Questions

      I read this exhaust will slightly drone at 2k rpm for a stock GT 13. Is there a way to avoid that drone if we buy a specific MBPR exhaust line that would go with these mufflers?

      These say 3 inch tubing. I thought my 2012 GT had 2.75 inch. Are these the correct item for me? Pipes over my axel are stock.

      • This axle-back will fit your vehicle.

      Helpful (0)

      Will I be able to clamp on my stock roush tips off my 2014 stage 3? What is the diameter of the outlet from where the tip can clamp onto the muffler? Thanks!

      • The tips included with the MBRP Installer Series Axle-Back Exhaust have a connection diameter of 3".

      Helpful (0)

      Looking to use my stock roush square tips with these axle backs. What is the diameter of the outlet where the tip is clamped onto the muffler? Thanks!

      • The tips included with the MBRP Installer Series Axle-Back Exhaust have a connection diameter of 3".

      Helpful (0)

      My 2011 mustang gt has a 3" bassani cat back. It was on the car when I brought it and do not have the original exhaust. I have added a off road xpipe and its now to loud. Will these mufflers mate with the bassani over axle pipes that are currently on my car?

      • The MBRP Installer Series Axle-Back Exhaust is a direct replacement for the factory exhaust and it will bolt up to the stock location. It may not be a direct bolt on to the Bassani Cat-Back and X-Pipe Combo, item # 31111, (

      Helpful (0)
      Post Your Question
      1 More Question
      are the polished tips adjustable or are they fixed in one spot? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Driver Side Axle-back Assembly
      • (1) Passenger Side Axle-back Assembly
      • (2) Exhaust Tips
      • Installation Instructions

      Tech Specs

      Axle-Back Exhaust Specifications
      Piping Material:Aluminized Steel Tip Material :Polished Stainless Steel
      Piping Size:3"Tip Size:4"
      Muffler Type:ChamberedFitment:2011-2014 GT, BOSS Mustangs

      Will It Fit My Mustang

      • Boss 302 - 12, 13
      • GT - 11, 12, 13, 14

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