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Flowmaster Outlaw Series Axle-Back Exhaust (13-14 GT)

Market Price $509.99 You Save 13% ($67.02)
Our Price

$442.97

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  • Item 18445
  • MPN# 817592

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Features, Video & Details

  • Super Aggressive Flowmaster Outlaw Sound
  • Durable 409 Stainless Steel Construction
  • 2.75" Mandrel-Bent Tubing
  • 4" Polished Stainless Steel Tips
  • Flowmaster Outlaw Mufflers
  • Fits 2013-2014 GT and Boss Mustangs

Review & Installation Video

Review & Install Video

Hey I'm Justin with AmericanMuscle.com, and this is my brief look into the Flowmaster Outlaw series axle back, fitting all 2013 Mustang GTs, and GT500's. If you're looking for a system that will really allow your 5.0 or 5.8L to be heard, then this is it, Flowmaster calls this their most aggressive axle back available for the new V8's, thanks to the two Outlaw series straight through mufflers, that should really help uncork the exhaust flow. Like many other Flowmaster exhaust, the Outlaw series is constructed using durable 409 grade stainless steel, and does feature 2.5" mandrel bent tubing. The exhaust is also finished off in that sleek black finish, which is great at resisting corrosion. Finally, everything exits out these dual 4" tips embossed with that iconic Flowmaster logo. Installation on this axle back is very straightforward and should only take you about an hour in the driveway using basic hand tools. Now let's hear how Flowmaster's Outlaw series axle back sounds compared to our factory exhaust.

Super Aggressive Flowmaster Sound. Give your Coyote 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 2.75" 16 gauge 409 stainless steel tubing for it's corrosion resistant properties, the Flowmaster Outlaw Axle-back features two 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.

Application. This Flowmaster Outlaw Series Axle-Back Exhaust System is designed to fit the 2013-2014 GT and BOSS Mustangs for both great looks and great sound. Reuses the factory clamps for installation.

Fitment: 2013 2014 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: 2.75" Tip Size: 4.0"
Muffler Type: Straight-through Fitment: 2013-2014 GT, BOSS
Will it fit my Mustang?
  • Boss 302 - 13
  • GT - 13, 14

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Great Sound at a Great Price

This was a quick 30-40 minute install that completely changed the character of my '13 GT. As others have said, the clips online truly do not do the mufflers justice. It just a completely different sound ...

Read More
Helpful (1)

5/5
Flowmaster Outlaw Axlebacks

I just put these on my 2013 Mustang GT and I love them. I was set on the Roush axlebacks and then heard these on YouTube and decided to go with the outlaws. I definitely recommend these mufflers to anyone ...

Read More
Helpful (1)

Overall Rating 4.7 out of 5 stars
Read All 100+ Reviews

Customer Photos (23) Submit Your Photo

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10 Questions / 6 Answers

Ask a Question

Why are clamps not included in this kit?

Notduhmamma

Helpful (0)
  • The factory axle-back already has a clamp, and these Flowmaster Outlaw Series Axle-Back Exhaust will re-use those clamps since they are the same style clamp.

    AMJEFF

I have a 2012 gt will it still fit because it says (13-14 gt)before i buy?

raul

Helpful (0)
  • You will need the Flowmaster Outlaw Series Axle-Back Exhaust (11-12 GT, 11-12 GT500), item # 18422, (http://www.americanmuscle.com/flowmaster-outlaw-axleback-1112gt.html) for your 2012 GT.

    AshleyK

By any chance could this exhaust fit my 2014 v6 mustang?

Mustang0404

Helpful (0)
  • Hi, This axle back will not fit on a V6 Mustang because the GT uses larger connection piping than the stock V6.

    Chris J

Does this fit well with my mustang GT/CS 2014?

Ram

Helpful (0)
  • Yes all though it will depend on how loud you want your exhaust to be, fitment should not be a problem, I had the same exhaust on my 2012 Boss Mustang a long with my side exit exhaust that came with the Boss ( no spacers in my side exhaust as well ) and the car was load very load, I also had the MRT H-Pipe with free flowing cats, all I can say is it sounded great but it was load. So if you like it load and free flowing go for it the Flowmaster Outlaw axle backs are great.

    hotdrummer

Could these fit on a 2014 V6 Mustang?

Kaycibby

Helpful (0)
  • The Flowmaster Outlaw Series Axle-Back Exhaust (13-14 GT) will not be able to fit a 2014 V6 Mustang because the piping size for V6's are 2.5" whereas the Flowmaster Outlaw Series Axle-Back Exhaust piping size is 2.75".

    KevinD92

fitment to aftermarket x pipe new to exhausts but will this fit a 3 inch offroad x pipe? it says this is 2.75 inch so im curious if this will fit.

14ingotsilvergt

Helpful (0)
  • The Flowmaster Outlaw Series Axle-Back Exhaust connects to the stock cat-back, which is connected the the x-pipe, so this will not directly attach a x/h-pipe as there is a section of exhaust between the x/h-pipe and the axle back system. As long as the section of exhaust after the x/h-pipe is 2.75" in diameter, these axle backs will fit like a glove.

    AMJEFF

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Customer Reviews (100+) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Less than 1 Hour

Installation Cost:0-$100

  • Loudness / Volume 4.75 4.8
  • Exhaust Note 4.759615 4.8
  • Fit & Finish 4.778846 4.8
  • Bang For Your Buck 4.676471 4.7



  • 5/5

    February 28, 2017

    Unbelievable!!!

    These axle backs sound amazing. Music to my ears. The rumble during start up and acceleration is off the charts. I call them my new noise makers. Took about 1 1/2 hours in my driveway to install. Stock mufflers are a little difficult to remove from the rubber hangers, but a little lube will help out. There is a slight drone around 2k rpms. Nothing that's too difficult to handle. These axle backs crank up the sound of your V8 the way you love to crank up your favorite song. Highly recommend them.

    DonaldR

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 10, 2016

    Awesome

    Love the sound ,old school mixed with new school flowmeter. Easy install didn't even have to take the pan bar off

    thecarbon

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    July 06, 2016

    Just mean!!!

    My 2014 coyote coupled with the Flowmaster Outlaws is one of the meanest sounding engines I've ever listened to. It sounds like a totally different car. If you want aggressive you want outlaws.

    Maximus

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    May 12, 2016

    Get it

    I've NEVER tackled anything like this before but installation videos seemed straight forward so I tried. Sounds great. Looks great. First couple days will be EXTREMELY load until carbon builds up. Use WD40 to remove old exhaust by spraying where old hangers come out of rubber mounts. Also, if it's still a little loud in the cabin, by some peel and seal for trunk and floor pan. Love my "new" mustang

    13GT

    Year: 2013 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    April 22, 2016

    Amazing

    For the money it's an amazing sound. I belong to a car Club and even they were shocked. I thought I would get a lot of cab noise but only a light hum. Outside the car, you know I'm there. Very easy to install. I sometimes just start my car just to hear the rumble. I love it.

    Eyecandy

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    March 17, 2016

    WOW! These things are loud!

    At first, I was very skeptical. I looked at every single axle back that caught my eye, and believe me it was a hard decision, considering I was going off the reviews on here. Eventually I pulled the trigger on the Flowmaster Outlaw Series, and man, am I glad I did! They are loud (for only an axle back) and give your Stang that nice muscle car roar! If you're a fan of loud, GET THESE, don't hesitate. But be warned, there is a drone, mainly on the highway at 2k rpm, but besides that these are top notch! Like everyone else says, the longest part about the install is getting the stock axle back off, so once you get those off, it's pretty much smooth sailing!

    Sinisterstang302

    Year: 2014 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    February 04, 2015

    What a change...

    I have a tune... JLT Air Kit, a Whiteline Trans Bushing and a Ford Racing short throw. In addition to this muffler I also added a new 3" MBRP H-Pipe. I tell ya what kids... If you want sound... this is it. I have been a muscle car owner for years. I still have my cats and resonators, but this was just surprisingly awesome! I am not sure I want to do headers and a cat delete because it just might be too much! Total install was $130 with the H-Pipe. Muffler alone would have been $65. Thanks to Detroit Muscle Speed Shop in Lakeland, FL for the fast and awesome job on the install. Everyone.. this is the muffler if you want your car to be noticed!

    Billiam

    Year: 2013 Submodel: GT Davenport, FL

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 28, 2014

    Great Exaust

    Louder than stock but not obnoxious. Great tone... Slight drone around 2k but nothing the radio can't drown out... Very happy with them!

    Meekrakkin

    Year: 2014 Submodel: GT Belfry, KY

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 14, 2014

    Flowmaster Outlaw Axlebacks

    I just put these on my 2013 Mustang GT and I love them. I was set on the Roush axlebacks and then heard these on YouTube and decided to go with the outlaws. I definitely recommend these mufflers to anyone that wants a loud but good sounding tone. I took off my OEM mufflers and started the car, and these mufflers have about the same volume but different tone. The only down side of these mufflers is the drone at 2k rpm. Its the worst drone ive ever heard so I stay away from 2k rpms. If your sensitive to drone, these are not for you. But other than that, these are awesome pipes. Also, they are VERY loud! I have my car completely stock except these mufflers and my cold start wakes up the neighborhood. You've been warned.

    Getsome19

    Year: 2013 Submodel: GT

    Helpful (1)

  • 4/5

    Installation Time: Less than 1 Hour

    August 17, 2013

    Fast and loud

    Exhaust is great, it takes longer to get the stock exhaust off one side then It does to put both outlaws on. Only thing I noticed is a decent drone at 2k rpm

    Tacticalbacon

    Year: 2014 Submodel: GT Beech Creek, PA 16822, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    July 18, 2013

    Great Sound at a Great Price

    This was a quick 30-40 minute install that completely changed the character of my '13 GT. As others have said, the clips online truly do not do the mufflers justice. It just a completely different sound than any other stang I have heard. This is my third mustang, with my '08 GT and '07 GT500 both having Flowmaster American Thunder mufflers. The Outlaws are hands down the best sounding of the three.

    Matt9494

    Year: 2013 Submodel: GT Chickamauga, GA, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    July 02, 2013

    Excellent!

    It took about an hour and half to install. No problems at all, fit is great. Yes, they are loud and that's why I got them. Sounds like a real car now!

    Stang72

    Year: 2013 Submodel: GT Houston, TX, USA

    Helpful (1)

  • 5/5

    Installation Time: Afternoon

    June 13, 2013

    Great Exhaust

    I made a huge mistake when I bought this exhaust. American Muscle couldnt ship it to me in time for the same price, so I bought it from another supplier that could, and boy was that a mistake, as I got the wrong year model and ended up having to wait even longer. I'll always buy from AM even if I have a to wait a extra 2 days. The exhaust note is great, and around 2100 rpms there is a slight drone, but you shouldnt have bought a mustang if you dont like loud. The only issue I had with installation were those rubber exhaust hangers, but after a few youtube videos on doing these I quickly installed these myself, and I am not a clever man. 5 Stars from Flowmaster here!

    anezay2004

    Year: 2013 Submodel: GT Tampa, Fl

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    April 14, 2013

    Sounds Amazing!

    Had my car less then 24 hours before I installed it. Did it in about 1 1/2 in my driveway. Hardest part was removing the old mufflers from the hangers but with a little silicone spray lubricant and a wiggle they came right out. The outlaws bolted up in 5 min each. All worth the sound. Its amazing. I don't know how to describe it. Its loud, but at 65-80mph cruising, no to very minimal drone. The sound is an attention getter. A must have. Ordered them as soon. As they were in stock and were delivered in 2 days.

    Grabber14

    Year: 2014 Submodel: GT Long Island, New York, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    March 09, 2013

    Wow!!!!!

    I have always had flowmasters on my mustangs. The Outlaws are the loudest axle back I've had to date. I'm waiting for spring weather to really test them ..Now it sounds like a muscle car. There is a drone at 2k. I've had the drone before you get used to it. The drone is the only negative. Which is quickly out weighed by the exhaust note from starting the car, idle , and acceleration puts the biggest grin on my face as if I was little kid..Ok as far as installation goes if your doing it yourself the hardest part is removing the stock mufflers..

    Mark32

    Year: 2013 Submodel: GT Branford, CT, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    February 12, 2013

    this exhaust system is to die for!

    Amazing is the first word that comes to mind. From the first bolt to the first crank of the key i is was impressed at the ease and finish of this flowmaster exhaust system! I would recommend this to consumers who only like to be noticed! The deep tones and earthquake like vibration coming from the rear of my stang has turned more heads than i can count. Well done flowmaster and american muscle for having made and supplied me this product..... cheers!

    atx5000

    Year: 2013 Submodel: GT Friendswood, TX, USA

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    December 22, 2012

    Flowmaster outlaws

    I always check on YouTube before buying exhaust and I liked this set up. I placed my ordered and as usual received it very quick and everything was there that was needed install was quick and simple the hardest part was getting the stock mufflers off but overall easy. The sound was exactly what I was looking for very happy with my purchase as always I'll be using Americanmuscle.com again everytime.

    DeepImpact

    Year: 2013 Submodel: GT TX

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    January 23, 2013

    Quick easy install, great sound

    Super easy install, took about 40 mins. Sound is awesome. There is drone at 2k rpm's but who cares, turn the radio up. A 3.73 or 4.10 gear swap would probably fix this. I found using a small piece of 2x4 wedged between the cat back exhaust pipe and panhard bar support brace will allow easier removal of the factory axle back. While pushing up on the exhaust tip, with a little muscle, slide the muffler towards the front of the car and it will drop out of the hanger mounts. Have fun and enjoy.

    Marky1

    Year: 2013 Submodel: GT Houston

    Helpful (7)

  • 5/5

    Installation Time: Less than 1 Hour

    November 11, 2012

    Great Sound, Great Looks, Great Price, Easy Install

    These Flowmaster Outlaws are amazing. No drone at all driving at 75 in my 2013 GT. At idle, they are barely louder than stock but much deeper and rumbley. When I rev it up it sounds like rolling thunder. Great smooth sound, not choppy. Around town getting through the gears it gets pretty loud, but as soon as you stop accelerating it quiets down again just as it should. Installation takes one wrench and about an hour, most of which is spent getting the bulky stock mufflers off. The 4 inch tips look great and really fill out the exhaust cutout in the bumper. I could not be more pleased with this product.

    blue5point0

    Year: 2013 Submodel: GT St Charles, MO, USA

    Helpful (5)

  • 5/5

    Installation Time: Less than 1 Hour

    November 06, 2013

    WOOW

    Bought my 2014 Mustang GT on October 14, came home, and ordered the exhaust 5 hours after the purchase of my car. Heard many 5.0's with other exhausts such as SLP, BORLA and ROUSH and none of them have that burble that this axle back provides. With the new coyote motor, you miss out on the bubbly exhaust the 4.6 had. With this axle back, you get that burble back! So many people stop and ask me what I have done to the exhaust! Fit and finish was perfect! Easy 20 min install, especially because my car was brand new so all the hangers were still fresh and easy to take off! Thank you American Muscle for your continued service!

    Patrick14

    Year: 2014 Submodel: GT Los Angeles, CA, USA

    Helpful (6)

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