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Flowmaster Outlaw Series Axle-Back Exhaust (15-17 V6)

Market Price $499.99 You Save 16% ($80.00)
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$419.99

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  • Item 525581B
  • MPN# 817713

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    Features, Video & Details

    • Super Aggressive Flowmaster Outlaw Sound
    • Durable 409 Stainless Steel Construction
    • 2.5" Mandrel-Bent Tubing
    • 4" Polished Stainless Steel Tips
    • Includes Two Flowmaster Outlaw Mufflers
    • Fits 2015-2017 V6 Mustangs

    Review & Installation Video

    Review & Install Video

    The Flowmaster Outlaw Series axle-back exhaust is for the 2015 and newer EcoBoost Mustang owners out there that are looking for an axle-back that'll be more refined and deeper sounding and is made from stainless steel with one of the most budget-friendly price points. So Exhaust for the S550 can get expensive fast, even axle-backs, but this is one of the more affordable options that still offers stainless steel materials. The install for this is easy. It should take you about an hour to complete and it's a two out of three wrenches on the difficulty meter since there is some cutting involved, but, of course, I'll get more into that later. One of the more important things when it comes to shopping for exhaust is going to be the sound. Like I said, consider this as one of the more refined sounding axle-backs for an EcoBoost. It gives more volume and more sound for sure and it's deeper than the stock exhaust, but it steers away from being obnoxious. A lot of times when systems provide a ton of volume increase for the EcoBoost, that's when you really start to get into the import sounding exhaust. If you're looking to steer away from that, this is one of the ones that you're gonna want to consider. Of course the EcoBoost is a four-cylinder turbo car, so that's what it's gonna sound like ultimately. I would call this system a three out of five on the loudness scale, with one being a quiet upgrade and five being a very loud upgrade. You do get more turbo noise with this axle-back since you are opening up exhaust flow around that turbo, and there is an occasional crackle on decel. Still, you don't have to worry about any drone in the interior with this axle-back. You're looking at two and half-inch mandrel bent tubing with this axle-back, which means that Flowmaster did step up the diameter here. The stock exhaust had a two and a quarter-inch diameter. This is made from 16-gauge 409 stainless steel tubing which is gonna be nice for those of you out there that are looking for an exhaust that'll have corrosion resistance and a longer life. Stainless steel will always last longer than aluminized steel would and will hold up better against corrosion. This system finishes with four-inch polished stainless steel tips. Price-wise, this is one of the more affordable options if you look at everything that is currently available. You can expect to pay a little over $400 for this axle-back, which is a good price considering the materials that you have here. Axle-backs for the EcoBoost range anywhere from just over $400 to nearly $1700. And as always if this one doesn't have the sound that you're looking for you have a ton of other options to check out. 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. I'm gonna call this a two out of three wrenches on the difficulty meter but just because of the cutting that's involved. It's nothing too difficult, but I just recommend some eye protection and a fresh Sawzall blade to make things 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 happen to have access to one. Cutting the factory axle-back isn't hard. Just be sure to measure twice and plan and mark where you're gonna be cutting the factory axle-back so you don't make a mistake. You can always mark the axle-back with painters tape if you want to, then use the Sawzall to cut the stock axle-back out. It'll probably be easiest to leave the hangers on the axle-back and just unbolt them from the car. You can transfer them over to the new axle-back then. 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. This is the Flowmaster Outlaw axle-back exhaust for the 2015 and newer EcoBoost Mustang, and you can check it out more online right here at americanmuscle.com.

    Super Aggressive Flowmaster Sound. Give your V6 powered Mustang that unmistakable Flowmaster sound with the Outlaw Series Axle-Back exhaust system from AmericanMuscle. This system improves exhaust flow using Flowmaster's race-oriented style Outlaw mufflers for that super, aggressive exhaust note your high powered Pony deserves.

    Stainless Steel Construction. Constructed from durable 2.5" 16 gauge 409 stainless steel tubing for it's corrosion resistant properties, the Flowmaster Outlaw Axle-Back features (2) race-oriented mufflers with massive 4.0" diameter polished stainless steel tips for impressive muscle car looks and sound. As an added bonus, the tips are embossed with the "Flowmaster" logo for true custom styling.

    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 Flowmaster Outlaw Series Axle-Back exhaust system is designed to fit the 2015-2017 V6 Mustangs for both great looks and great sound.

    Fitment: 2015 2016 2017 Details

    What's in the Box
    • (2) Muffler Assemblies
    Installation Info
    Tech Specs
    Axle-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
    Piping Size: 2.5" Tip Size: 4.0"
    Muffler Type: Straight-through Fitment: 2015-2017 V6
    Will it fit my Mustang?

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    48 Questions / 6 Answers

    Ask a Question

    I live in California. If i put this on, will i still pass smog? This is probably the only reason holding me back. I have a 2017 v6 mustang.

    Daniel

    • The Flowmaster axle backs will pass smog testing however you will want to check your local laws on noise restraints to be safe.

      Ricky36

    Helpful (3)

    Does installing the Flowmaster Outlaw Series Axle-Back Exhaust on my 2017 Mustang eccoboost affect the new vehicle warranty from FORD?

    WilliamC

    • Hello, Ford explained to me that the only way and after market part would void the warranty is it poorly malfunctioning.

      SpencerM

    Helpful (2)

    I have the convertible version of the 2015 Mustang Ecoboost Premium. With this axle-back fit?

    JPS04001

    • The Flowmaster Outlaw Series Axle-Back Exhaust is designed to fit both coupe and convertible ecoboost Mustangs.

      Rob D

    Helpful (2)

    is this product legal in the Rio Grande Valley ,Texas

    reys

    • Unfortunately, we are not familiar with the local laws and regulations in your city. Please contact your local Department of Transportation, and/or Law Enforcement Agency.

      VincentV

    Helpful (1)

    Is this system compatible with the Flowmaster Scavenger series Y-pipe?

    Josiah

    • The Flowmaster Scavenger Series Cut and Clamp Resonator Delete Y-Pipe, Item 389694 is compatible with these axle-backs. http://www.americanmuscle.com/flowmaster-y-pipe-2015gt.html

      AMJEFF

    Helpful (1)

    Everything comes as shown in the photo?

    RaynardT

    • These Flowmaster Outlaw Series Axle-Back Exhaust include the muffler assemblies and the clamps shown in the product photos.

      AMJEFF

    Helpful (1)

    People Who Bought This Item Also Bought

    Customer Reviews (100+) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Loudness / Volume 4.382165 4.4
    • Exhaust Note 4.643312 4.6
    • Fit & Finish 4.840765 4.8
    • Bang For Your Buck 4.738853 4.7



    • 4/5

      Installation Time: Afternoon

      May 19, 2018

      Flowmaster

      For the price you can’t really beat the benefits from this axleback. It has a bit of a drone. By any means it does not make you sound like a v8 but when you hit it, it is a head turner. Noticeable gain in horsepower right after install. Even pulled with a 2016 hemi dogde charger and gave him a run for his money. Happy with the purchase!

      EddieH

      Year: 2017 Submodel: V6

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      May 15, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Sound Great

      These were a great buy and really brought my Eco to life. They sound much better than they do in any videos online. For the price they can't be beat! 5 stars.

      MustangFrank

      Year: 2015 Submodel: EcoBoost

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      May 13, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      wow

      I put these on my wifes 2018 eco boost today and we are quite surprised with the sound. A little louder than i thought but nice sure notice when you get the rpms up.

      JeffD

      Year: 2018 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      May 13, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Great sound quality

      Sound is great just enough tone a a little crackle on deceleration paired with resonator delete scavenger y pipe

      Riley00Coyote

      Year: 2018 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      May 10, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Flowmaster outlaw

      It has a nice and deep sound, but it’s really quite when the car is running on low rev, only gets loud when u want it to be, very happy with it

      TommyX

      Year: 2017 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      May 09, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      some drone, decent tone

      You can defiantly tell the car is 4cyl but sounds good. some drone around 2k but not bad. My wife actually likes the sound more than I do.

      MatthewB

      Year: 2016 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      May 01, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Awesome sound

      Love the sound . Definitely feels like a sports car now . Great deal $409 dollars.

      MarvinV

      Year: 2015 Submodel: EcoBoost

      Helpful (1)

    • 3/5

      Installation Time: Less than 1 Hour

      May 01, 2018

      Too much drone

      Nice fit and finish.. sounds deep and loud .. cold start is great.. but I hate the drone at 120kmph..

      AJ

      Year: 2017 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 27, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Nice sound

      Not too loud but loud enough and aggressive when in the throttle

      KedrickJ

      Year: 2018 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 21, 2018

      Everything I was looking for...

      When purchasing the product I wanted to get something that I can turn heads when I was driving by and something to rev at the lights. This has put a smile on my face instantly!! Happy I purchased the product. If your thinking about it don’t think any longer great price and sounds awesome!!

      KourtneyG

      Year: 2015 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 20, 2018

      Best sound

      I live these mufflers and they always catch everyone's attention and turn heads! Easy to install and sounds so good with the Flowmaster X-pipe!

      AveryP

      Year: 2017 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 11, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Sounds so much better!

      I love my 15' Ecoboost. But the sound was just so boring. After adding the Outlaw series axle-back, my car sounds great!! Great bass tone, with some nice crackle during shifts. The shop installing it kept telling me that I'd be back to delete the resonator. But once they had it on, they changed their minds. This week I added the Rush CAI, it sounds even better!

      12ozRuss

      Year: 2015 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      April 11, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Awesome!!

      Great Axel-Back! Very happy with this choice! Definitely makes the ecoboost sound better than stock.

      Andrew

      Year: 2017 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      April 10, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Sounds Great

      Got this and the y-pipe resonator delete and it makes the ecoboost great!

      KyleF

      Year: 2015 Submodel: EcoBoost

      Helpful (1)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      April 10, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      2018 Mustang Ecoboost Outlaw Axle Back

      Great quality product from Flow Master. Fit and finish are very good. Has a deeper exhaust note for the Ecoboost, which I was looking for. Not poppy or raspy on deceleration, I do have the stock resonator in place. I have the 10 speed auto and I do have alittle drone with the system between 1200 and 1500 RPM. Not real bad. Overall very satisfied with the setup.

      KeithP

      Year: 2018 Submodel: EcoBoost

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      April 04, 2018

      Best exhaust I've ever had!

      I bought this axle back for my 2016 V6 and it sounds so awesome! Very beautiful rumble but not over powering loud. Has a nice drone noise when driving down the highway. This exhaust makes your car sound so sexy lol I absolutely LOVE mine!! Amazing price as well. I had it installed at a local exhaust shop and paid $100 so in total I spent $519.00! You won't regret this exhaust

      Brittany

      Year: 2016 Submodel: V6

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      April 02, 2018

      Worth every $$$!!!

      I have a 2017 V6 Mustang and the sound of the stock car was lacking for a muscle car! After installing Flowmaster Outlaw Series Exhaust I see people turning there heads all the time! The drone in the car is alittle bit much but if you are like me and always like to jam out it is no big deal and you CAN still easily have a conversation which I've seen people say it's to loud to talk to passengers! Great buy worth every penny!

      ZaneH

      Year: 2017 Submodel: V6

      Helpful (1)

    • 4/5

      Installation Time: Less than 1 Hour

      March 30, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Not what I expected...

      Hello AM! These mufflers are awesome!!! I expected them to be insanely loud but to be honest... they are only loud when you are smashing the pedal. Cold start sounds amazing but the idle gets quiet once the car warms up, I was hoping for a lopey 4 cylinder, but I guess not. Time for the next mod!!! Y pipe/resonator delete x)

      HP9994

      Year: 2016 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      March 27, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Wowmaster

      Great exhaust, it’s not obnoxious but is just right! I was planning on adding a y pipe but the sound it makes is great! You’ll love it! Installed for $100. Honestly had low expectations because it was an ecoboost but it for sure shut me up.

      GenaroG

      Year: 2015 Submodel: EcoBoost

      Helpful (2)

    • 4/5

      Installation Time: Afternoon

      March 23, 2018

      Review from Flowmaster Outlaw Series Axle-Back Exhaust (15-18 EcoBoost)

      Gave the Ecoboost a little roar!

      This is a good upgrade for the Ecoboost to give it a little roar. While it will never sound like a V8 or V6 this makes it sound a whole lot better than the factory. The worst part of the install was cutting the factory pipes. Measure twice cut once is the key. Also make sure you have the clamps hanging in the right direction to give yourself more ground clearance. Look up some videos to help you with the install then have at it. It was fun to do.

      KO

      Year: 2016 Submodel: EcoBoost

      Helpful (1)

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