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Magnaflow Competition Series Axle-Back Exhaust (15-17 GT)

Item 389032
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      Review & Installation Video

      Hey, guys, Stephanie with, and this is my review and an install of the Magnaflow Competition Axle-Back Exhaust, fitting 2015 and up GT Mustangs. We're gonna cover a few things with this exhaust in this video. Mainly we're talking about the sound of the axle-back, the materials, and the install. The install for this is easy. It's a two out of three wrenches in the difficulty meter, but only because you do need to cut in order to install an axle-back on an S550, but we'll talk about that more later. The Magnaflow Competition Axle-Back is going to be a good option for the S550 GT owners out there that are looking for a deep sound and a smooth exhaust tone. I wouldn't call this system quiet, but it's not loud either, so it's a perfect option for those of you out there that are looking for something in between. The sound that this axle-back offers is what I consider a low rumbling growl. It's not a loud and raspy system, but it does give a smooth sound. Overall, this is a deep sounding system that doesn't have a lot of raspiness and popping to it. It's got some volume to it, and keep in mind that this is just an axle-back, so just know that it can get even louder with a mid-pipe and headers. With that being said, I'm gonna give it a solid two or three out of five on the loudness scale. At the end of the day, though, no matter if you love this sound or hate it, it really all depends on what you're looking for and what you like, and luckily there are quite a few options out there.So the sound that this offers is courtesy of the full stainless steel system that's mandrel-bent. It's a two and a half inch system with four and a half inch polished stainless steel tips for out back. The axle-back is designed to be more free-flowing and reduces a little back pressure, and the mufflers are also straight through mufflers. And I always say this, but stainless steel is always a great option for the cars that see all different types of road conditions, because it offers great corrosion resistance.When we start to look at price, this axle-back is on the more expensive side of things. It's gonna cost between $750 and $800. So it's up there with the likes of Borla, but there's still the Ford Racing and Corsa offerings that are a bit more expensive. If this is out of your price range, there are a ton of exhaust options for the S550, so you can always check out some of those. You're gonna be looking at the typical cut and clamp design with the install for this axle-back since you do need to cut all S550 axle-backs. We're gonna call this a two out of three wrenches on the scale, but only because of the cutting that's involved. It's nothing difficult, but I just recommend some eye protection and a fresh blade to make the cutting easier. Overall, you're looking at about two hours to get this all done. A lift would certainly make things easier for you here, but the job can be done on jack stands as well if you don't have access to one.Cutting the factory axle-back isn't hard. Just be sure to measure twice and plan to mark where you'll be cutting so you don't make a mistake. The new axle-back will come with new clamps for you, so you don't have to worry about that. When you go to install your new setup, it'll probably be easiest to leave everything loose until you have it all lined up and then tighten it down.Overall, the Magnaflow Competition Axle-Back is a two and a half inch stainless steel axle-back that's a great option for those looking for a sound that's in the middle of the road when it comes to volume. It offers a smooth and deep sounding exhaust tone from straight-through mufflers, and it has four and a half inch tips for out back. You can check this axle-back out some more online for yourself, and for all things Mustang, keep it right here at

      Product Information

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


      • Aggressive, Muscle Car Sound
      • Stainless Steel Construction
      • 3" Mandrel-Bent Tubing
      • 4.5" Polished Stainless Steel Tips
      • Compatible with Fastback and Convertibles
      • Fits All 2015-2017 GT Mustangs


      Add Horsepower. Stop choking off your high-powered 5.0L V8 S550 with a stock exhaust system and enjoy more horsepower with a Magnaflow Competition Axle-Back. By reducing back pressure and giving your 2015-2017 GT Mustang a free-flowing exhaust, you'll see great power and torque gains.

      Aggressive Muscle Car Sound. Give your Coyote powered 2015-2017 GT the deep, aggressive rumble it deserves with a Magnaflow Competition Axle-Back. This premium quality exhaust features free-flowing, straight-through mufflers that increase power and give your GT an unmistakable muscle car sound.

      Magnaflow Quality. Constructed from durable 3" diameter mandrel-bent stainless steel tubing for its corrosion resistant properties, this Magnaflow Axle-Back features two straight-through mufflers with brightly polished 4.5" stainless tips, that exit in the stock locations for impressive muscle car looks and sound.

      Cut & Clamp Installation. The installation of this Axle-Back Exhaust requires cutting and removing the stock muffler assemblies and clamping the new muffler assemblies in place. Clamps and instructions are provided.

      Application. This Magnaflow Competition Axle-Back Exhaust system is specifically designed to fit fastback and convertible 2015-2017 GT Mustangs and give it the deepest, most aggressive sound possible.

      Note. Coupon codes cannot be applied to this product.

      Fitment: 2015 2016 2017 Details

      MPN# 19103

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (13)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 13 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • December 13, 2018

        4 2017 GT - AlbertM Installation Time: Less than 1 Hour

        Old school deep sound

        It sounds great at idle. Too much drone between 1500-2500 rpm. Installed today by a mechanic shop. $195 for installation. It’s a daily driver car. I kept the original muffler just in case the drone noise become too much so I can swap it back to the original muffler.

        Helpful (3)
      • November 07, 2018

        5 2017 GT - EricW Installation Time: Less than 1 Hour

        Nice sound

        Installed this with the help of a mechanic friend and banged it out in under an hour. Gave my 2017 GT a much deeper sound with a little more volume. There's no popping or raspy sounding exhaust note here. Ultimately I decided that I did not want to go overboard and be a cop magnet in the car with a very loud exhaust so I decided this was the best option for me and I'm not disappointed I chose Magnaflow.

        Helpful (4)
      • October 22, 2018

        5 2017 GT - AnthonyL

        Great product!

        Sounds awesome! My Mustang sounds like a real racing car. There is a noticeable drone noise in the cabin, since I connected it with an X-pipe, but overall I love the loudness and it works great! I would definitely recommend this to anyone who wants their car to have that rumbling in idle and screams when stopping onto the throttle in low gear.

        Helpful (4)
      • November 26, 2017

        1 2016 GT - BillsS

        Too loud.

        Way too much drone. It this this a daily driver you’re going to hate it! Say good bye to your ear drums and 6th gear unless you’re going 90

        Helpful (9)
      • November 14, 2017

        5 2015 GT - DavidS Installation Time: Less than 1 Hour

        Can ya hear me now?

        Not only does it look badass, it sounds great too! Using the Bama Ghost Cam tune and it sounds so sweet. Get this! You won't be disappointed!!

        Helpful (6)
      • May 26, 2017

        5 2017 GT - LarryC Installation Time: Shop Install Installation Cost: $100-$250

        17 GT Premium

        Outstanding exhaust! It really made my GT a Beast!

        Helpful (5)
      • April 11, 2017

        5 2015 GT - Stitch2 Installation Time: Less than 1 Hour

        Magnaflow Competition rocks!

        I combined my Magnaflow Competition with the MRT h-pipe. This combo has given new life to my S550 with a deep throaty sound and improved acceleration felt in the seat of my pants. I couldn't be happier. The install went smooth with great fitment.

        Helpful (6)
      • May 07, 2016

        4 2015 GT - PASTORJ Installation Time: Less than 1 Hour

        Magna flow

        Had the install done by a professional. I installed the competition exhaust with the X pipe. Sounds great but very loud.

        Helpful (7)
      • March 30, 2016

        4 2015 GT - Stumpy Installation Time: Less than 1 Hour

        Excellent choice

        Excellent choice for my Mustang, a very low aggressive growl when you star it up with a very aggressive tone when your on teh gas. Best of all when you're cruising theirs no drone at all.

        Helpful (9)
      • August 29, 2015

        5 2015 GT - captain Installation Time: Afternoon

        love the sound sitting at idle; nice low rumble on highway driving.

        the exhaust has a very distinct rumble both when starting and just driving on road.

        Helpful (8)

      Questions & Answers (7 answers)

      5 Top Rated Questions

      Paired with an Mishimoto or HeartThrob, which one will have the less drone ?

      • For minimal drone, I would recommend the Mishimoto over the Heartthrob mid-pipe.

      Helpful (1)

      I already for a Ford aftermarket X pipe installed on my Mustang and removed the factory resonator. If I purchase the axle-back exhaust, does the clamp system go from my existing x-pipe to the back?

      • This and other Axle-Back exhausts will connect to the exhaust near the rear axle. To connect to the x-pipe, you would want to look at cat-back systems.

      Helpful (0)

      The 3" Mandrel-Bent Tubing are 3" at one end and 2.5" at the other hand? For example if I want to use the Mishimoto H Pipe which is 2.5" : will it fits perfectly?

      • Yes, both the axle back and H-pipe would work together as long as the joining pipe between them is also 2.5 inches.

      Helpful (0)

      I would like to pair an H pipe with the Magnaflow Competition axleback exhaust on my 2015 GT. I'm looking for a low tone. Any suggestions?

      • Both the Heartthrob or Mishimoto cut-and-clamp are going to be ideal for the deeper low tone. Heartthrob:

      Helpful (0)

      Will this system be compatible with the Corsa double helix X pipe, I have the Xtreme system installed but wanted to change out axle backs

      • Unfortunately the Magnaflow Competition Axle-Back Exhaust will not be compatible with your Corsa Xtreme Cat Back Exhasut.

      Helpful (0)
      Post Your Question
      2 More Questions
      I have the Magnaflow street cat back installed on my GT right now, will the Competition series be able to bolt up to the X-pipe provided from the street catback? 1 answer
      Will the Magnaflow competition Axle-back exhaust linked with either the Flowmaster Scavenger X-pipe or Ford Racing X-pipe work, without having to cut the existing exhaust system at all? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Muffler Assemblies
      • (2) Inlet Pipes
      • (2) 3" Clamps
      • (2) 2.5" Clamps

      Tech Specs

      Axle-back Exhaust Specifications
      Piping Material:Stainless Steel Tip Material :Polished Stainless Steel
      Piping Size:3"Tip Size:4.5"
      Muffler Type:Straight-throughFitment:2015-2017 GT

      Will It Fit My Mustang

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