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Nxt Step Performance Axle-Back Exhaust (15-20 EcoBoost w/o Active Exhaust)

Item 398969
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$314.99 (each)

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      Review & Installation Video

      Product Information

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


      • Throaty Rumble Tone
      • Enhances Exhaust Flow Thus More Torque and Horsepower
      • Flow Path Chambered Muffler
      • 2.25 inch Piping Size
      • Dual 4 inch Exhaust Tips
      • T304 Stainless Steel Construction
      • Super Lightweight Design
      • Stainless Steel Polish
      • Direct Bolt-On Installation
      • Not Compatible with Active Exhaust
      • Fits 2015 to 2020 Ford Mustang EcoBoost Models


      Throaty Rumble Tone. NXT Step Performance Axle-Back Exhaust features a wide and free-flowing tube design that enhances air flow thus delivering a booming exhaust growl. The chambered muffler makes the sound even more intimidating. The unmistakable boxter sound produced by the exhaust kit similarly makes it suitable for racing applications.

      Better Performance. By enhancing exhaust flow, the kit significantly boosts your EcoBoost’s rear torque and horsepower. It gives you an average of 15-20 extra HP. It is also designed to remarkably boost your Mustang’s turbo response thus giving you a better RPM. You are also assured of better fuel economy since the kit lowers exhaust temperatures thus increasing engine power. Since the kit doesn’t contain components that may burn out with continued use, the performance gains will be maintained for ages.

      High-Grade Construction. NXT Step Performance Axle-Back Exhaust is fashioned from industrial-grade mandrel bent 304 stainless steel that is corrosion and rust resistant for superior strength. Its pipes are similarly made from lightweight stainless steel. The entire kit is coated with a stainless steel finish to enhance its looks and durability. What’s more, the finish is scratch resistant, and gives the Axle Back Exhaust a phenomenal appearance .

      Bolt-On Installation. NXT Step Performance Axle-Back Exhaust is compatible with your Mustang’s OEM clamps. It’s slip-on design means that you can install it without making modifications to your EcoBoost. Only basic hand tools are needed.

      Warranty. The kit is backed by a limited lifetime warranty against structural defects after inspection.

      Application. NXT Step Performance Axle-Back Exhaust fits all 2015 to 2020 Ford Mustang EcoBoost Models without the Active Valve Exhaust.

      Fitment: 2015 2016 2017 2018 2019 2020

      MPN# EX3041

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (36)

      Write a Review

      Ratings Summary

      4.8 out of 5 overall rating from 36 customers

      Installation Time: Afternoon

      Installation Cost: 0-$100

      • March 16, 2020

        3 2015 EcoBoost - LeninA Installation Time: Less than 1 Hour

        Decent purchase but not the best sound!

        I had higher expectations for the sound thought it was going to sound like the one in the video but sounds like a stock muffler but with a deeper tone.

        Helpful (0)
      • February 04, 2020

        5 2019 EcoBoost - movingon Installation Time: Less than 1 Hour


        not only do these look great with the bigger then stock tips they fit perfect took my son and I 20 mins start to finish and car sounds better not to load but a lot better then stock

        Helpful (0)
      • January 30, 2020

        5 2019 EcoBoost - Boulderbob Installation Time: Less than 1 Hour

        Great value, good quality

        I am impressed with the construction quality and ease of installation. Looks great with the big 4” tips and sounds great, deep and not obnoxious.

        Helpful (0)
      • January 25, 2020

        5 2018 EcoBoost - gstar345667 Installation Time: Shop Install Installation Cost: $100-$250

        Great tone w/ resi delete!

        Very impressed with the sound. Paired with my Roush Y-Pipe it sounds deep in idle and has a good punch when pulling through the gears. Be ready for some noise, but not much in idle. I highly recommend these!

        Helpful (0)
      • December 30, 2019

        5 2015 EcoBoost - MikeXu12 Installation Time: Less than 1 Hour

        Great Value for your money

        I would say the sound is just right for me, not too loud but definitely change the stock exhaust sound and it sounds more aggressive now like a mustang should be like!!!

        Helpful (0)
      • November 11, 2019

        5 2015 EcoBoost - Icyboost Installation Time: Shop Install Installation Cost: $100-$250

        Love the sound

        It sounds way better than stock while still sounding slightly like it’s not after market. It gives the ecobeast a nice rumble that’s not too aggressive. I love it.

        Helpful (0)
      • November 05, 2019

        5 2018 EcoBoost - OrxanB Installation Time: Full Day


        undamaged and flawless, easy to install, pleasant sporty sound

        Helpful (1)
      • October 12, 2019

        5 2015 EcoBoost - Anonymous Installation Time: Less than 1 Hour

        NXT Exhaust System

        I love my new Exhaust system! Took less than an hour to instal.

        Helpful (0)
      • October 08, 2019

        5 2018 EcoBoost - Kid65 Installation Time: Less than 1 Hour

        gave my ecoboost exactly what it needed

        I listened to every exhaust made on you tube and finally decided on Nxt Step Performance axle-back. I had them installed at a performance shop for 90 dollars. Took 45 mins. The tone is deep and the sound is mellow. Not obnoxious like a japan made tuner. It has some drone but its not overbearing.Just Perfect. These are the best value on the market. Look Great also

        Helpful (4)
      • September 29, 2019

        5 2016 EcoBoost - thumper56 Installation Time: Afternoon

        Plesently suprised

        The sound clips really don't do this system justice. It has a great exhaust note even for a four cylinder. Not hearing any drone either. I may be mistaken but I swear I feel a little more power. All in all very pleased. Install took my son a little over an hour

        Helpful (2)

      Questions & Answers (21 answers)

      5 Top Rated Questions

      Will this fit with the FlowMaster Y-Pipe that is also sold on the website?

      • The Nxt Step Performance Axle-Back Exhaust will be compatible with the Flowmaster Y-Pipe.

      Helpful (4)

      I have a 2016 Ecoboost stock exhaust was looking at these axle backs but am concerned about the drone I drive pretty much all highway 75mph plus. Will it be very loud in the cabin? Or would you recommend another axxle back ?

      • Since the NXT Axle-Back Exhaust utilizes a muffler system, this will eliminate most drone created by those exhausts that are fully straight piped. This exhaust produces almost no drone when cruising at highway speeds.

      Helpful (3)

      The title of the product says Axle-Back Exhaust (15-19 EcoBoost w/o Active Exhaust) and does not mention any brand name. The video mentions Nxt Step Performance mufflers. So are both products same?

      • This exhaust is made by NXT Step Performance.

      Helpful (2)

      Will the computer need to be re-flashed or will any computer resetting be required if this system is installed? I am wondering how it affects the pressure in the exhaust. Thank you.

      • You would not need a tune with this axle-back exhaust and would have little effect on the back pressure of the system.

      Helpful (1)

      Is this compatible with a 2016 Ecoboost Convertible and if so does it require cutting the stock exhaust? Can the stock exhaust be ever put back on?

      • This Nxt Step Performance Axle-Back Exhaust will fit with on a convertible and the factory exhaust must be cut. The stock exhaust could be put back on with a clamp, but it will not fit exactly as it did before.

      Helpful (1)
      10 More Questions
      Will this fit on a 2015 ecoboost with stock exhaust? 1 answer
      I bought these NXT axle backs I had the resonator removed last year and help the sound with the stock mufflers. We installed these and the sound is really loud and resonating, especially under load, So if I put the resonator back on how much will the loudness be effected and will it still sound throaty without all the resanation? 0 answer
      Hey y’all my question is about the cars performance with the next step axle back for the 2.3 with or without the resonator and will turbo spoil up change thanks vince 0 answer
      Will this cause my dashboard to Rattle? I heard some axle back can cause Dashboard rattle. 1 answer
      Does this muffler make popping noises? Especially when paired up with a resonator delete? thanks! 1 answer
      How is the volume and note compared to the Magnaflow Street and Competition? 1 answer
      when it will be available? right now its saying out of stock. The prize mentioned is for the pair (both) ? 1 answer
      What does active exhaust mean? 1 answer
      Does this fit on a 2017 mustang ecoboost premium convertible? is that 314$ for both the axle or we have to buy two separate ? 0 answer
      It’s the price for the pair or just one? Thanks 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Muffler Assemblies
      • Hardware Kit

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