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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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    47 Questions / 94 Answers

    Ask a Question

    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 (3)

    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 (3)

    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)

    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 4.7

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Loudness / Volume 4.344828 4.3
    • Exhaust Note 4.597701 4.6
    • Fit & Finish 4.833333 4.8
    • Bang For Your Buck 4.729885 4.7



    • 5/5

      July 22, 2018

      Great Immediate Upgrade

      As soon as I heard this I was in love and ready to complete my exhaust system. My neighbors don’t love it as much and that tells you all you need to know. Drone is a little heavy, but you get used to it.

      Landry

      Year: 2017 Submodel: V6

      Helpful (0)

    • 5/5

      July 13, 2018

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

      FlowMaster Outlaw on Ecoboost

      Good Sound, lightweight, easy install Fast Delivery

      Alberto

      Year: 2016 Submodel: EcoBoost

      Helpful (0)

    • 2/5

      Installation Time: Less than 1 Hour

      July 10, 2018

      well built, but way too much drone

      received the exhaust and installed fairly easily on my 2017 V6.....the problem is the drone is unbearable anywhere below 3000 RPM....which is all the time when driving in the city....I read reviews that said it wasnt that bad.....flatout liars...its absolutely atrocious...DO NOT DAILY WITH THIS EXHAUST!!!! I have learnt my lesson, cannot recommend for anything outside of track use....

      DonovanJ

      Year: 2017 Submodel: V6

      Helpful (0)

    • 4/5

      Installation Time: Less than 1 Hour

      July 08, 2018

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

      Sounds great for an ecoboost

      Only reason I gave 4 instead of 5 stars is because of the price and price to install if you don’t have your own lift.

      ConnerM

      Year: 2018 Submodel: EcoBoost

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      July 04, 2018

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

      Signature eco-boost mustang sound

      I combine this with a Borla 40670. Replacing resonator with the Borla #40670. Beautiful clean sound. No drone at highway speed. The way an Ecoboost Mustang should sound.

      JesusD

      Year: 2017 Submodel: EcoBoost

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      July 01, 2018

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

      Great Product Price

      You can't beat the price for an axle back exhaust, I combined it with a y pipe sounds pretty good not to loud just right. It's a 4 banger so it will never roar like a V8 regardless of your setup.

      BigLou

      Year: 2015 Submodel: EcoBoost

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      June 27, 2018

      Great Exhaust

      Perfect tone and loudness for the V6. My set up includes an X-pipe and this exhaust, little drone but overall great buy.

      AnthonyL

      Year: 2017 Submodel: V6

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      June 24, 2018

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

      Roar

      At High RPM this exhaust really sounds aggressive. Breaks a lot of necks and if your car is running hot enough and the engine is warm enough it does have a little bit of back fire (cracks and pops) that everyone wants. Easy install and really simple look with bigger and fuller exhaust tips.

      EcoBeast

      Year: 2017 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      June 20, 2018

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

      Great for the money

      Decent deeper tone. Pair with scavenger x pipe and its loud.

      NathanielE

      Year: 2015 Submodel: EcoBoost

      Helpful (1)

    • 4/5

      Installation Time: Less than 1 Hour

      June 17, 2018

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

      Decent not obnoxious

      The exhaust sounds great but the videos I’ve seen I expected something louder, but I am glad that it’s not. It sounds great and it’s really growing on me. It’s a good combination of great sounding and not being obnoxious. I would recommend these. I had a muffler shop install these and they were done in like 45 min but the clamps it came with were too big or something so they had to tack weld it into place.

      Renny

      Year: 2016 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      June 09, 2018

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

      Just right

      I got this as one of my first mods. I'm pleased with the product. It has a nice aggressive tone, but is not as loud as a lot of the videos suggest. It quites down a bit after idle. The car is slightly more responsive. Definitely worth the money if you don't want to get a cat back right away; and want to put towards other mods. Recently had an AEM CAI installed and it sounds even better. Will probably get a y pipe/ resonator delete in the future.

      DAllen

      Year: 2016 Submodel: EcoBoost

      Helpful (2)

    • 4/5

      Installation Time: Less than 1 Hour

      June 05, 2018

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

      Exhaust

      One of the best purchases so far. The exhaust gives a very nice mean sound on my ecoboost mustang. Highly recommend it.

      MarkA

      Year: 2015 Submodel: EcoBoost

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      June 02, 2018

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

      Great Sound

      Just measured cut pipe. Easy bolt on. Sounds amazing. Not too load. just perfect.

      Talib

      Year: 2018 Submodel: EcoBoost

      Helpful (2)

    • 3/5

      May 29, 2018

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

      Didnt work for me

      I can say everything is good. This is the first mod I did and had to cut the stock one and fit this. After a little while the car seemed a lot slower. I removed this and welded back the old ones. Now for atleast 2 years I have been having trouble to get back the same throttle response and all. I liked the tone but not sure what went wrong or just my perspective, didn't like the pickup.

      sudheerC

      Year: 2015 Submodel: EcoBoost

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 26, 2018

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

      Amazing!

      If you want to wake up your ecoboost these will for sure turn it into a ecoBEAST

      JustinR

      Year: 2015 Submodel: EcoBoost

      Helpful (2)

    • 5/5

      Installation Time: Less than 1 Hour

      May 24, 2018

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

      Worth the money

      Well worth the money its everything I expected plus some. Gave my EcoBoost the sound I was looking for.

      BrianP

      Year: 2017 Submodel: EcoBoost

      Helpful (1)

    • 4/5

      Installation Time: Less than 1 Hour

      May 22, 2018

      Like it a lot

      Sounds very nice. Loud but not too loud. Exhaust note could be a bit better.

      FrankM

      Year: 2015 Submodel: V6

      Helpful (1)

    • 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 (2)

    • 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 (1)

    • 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)

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