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Flowmaster Outlaw Series Axle-Back Exhaust (11-12 GT, 11-12 GT500)

100+ Reviews
Our Price

$418.70

  • Item #18422
  • MPN# 817516

  • Market Price $464.99
  • You Save 10% ($46.29)
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Product Videos Customer Photos
Features
  • Super aggressive Flowmaster Outlaw sound
  • Durable 409 stainless steel construction
  • 2.75" mandrel bent tubing
  • 4" polished stainless steel tips
  • Includes two Flowmaster Outlaw mufflers
  • Fits 2011-2012 GT, Boss and 11-12 Shelby GT500
Description
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 2011-2012 GT, Boss and the 2011-2012 Shelby GT500 Mustangs for both great looks and great sound.

Mustang Fitment: 2011 2012 Details

What's in the Box
  • (2) Muffler assemblies
  • (2) Clamps
Installation Info
Tech Specs
Axleback 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: 2011-2012 GT, Boss and Shelby GT500
Will it fit my Mustang?
  • Boss 302 - 12
  • GT - 11, 12
  • GT500 - 11, 12

Most Helpful Reviews Read All Reviews

Overall Rating 4.8/5 Write a Review
5/5

Top 1000 Contributor

Flowmaster Outlaw Axle-back for 5.0

If you want an aggressive muscle car, one that sounds like a 60's era, you need these mufflers! I turn heads everywhere I go with this system. It is louder than stock and has a slight drone at 2K RPM's.

Read More
Helpful (8) (0)

5/5
Very good, but not perfect.....

I've had the FRPP GT500's, Kook's, Roush, and now the Flowmaster axlebacks, OVERALL, the Outlaws are my favorite! The GT500's and Kook's had better exhaust TONE at WOT, but were too quiet during normal

Read More
Helpful (9) (1)

Videos

Hi I’m Justin with AmericanMuscle.com, and I’m taking a look at Flowmaster’s outlaw series axle back for your 2011 and up Mustang GT. The outlaw series is Flowmaster’s most aggressive system thanks in View Full Transcript

Customer Photos (19) View All Customer Photos

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Q & A (11 Questions, 7 Answers) Ask a Question

Dose this part fit on my Mustang GT 2010 ?! i'm so confused.

DOON Year: 2010 Model: GT

Question Resolved
Good Question (0) (0)
  • Not this particular axle-back. Below, I've attached the link for the Flowmaster Outlaw Series Axle-back that will fit on your 2010 GT! Give us a call if you have any further questions!

    Helpful (0) (0)

    LisaS Year: 1992 Model: GT

Show 1 more answer

Which axle back muffler system is louder the flowmaster outlaw series or the heartthrob muffler delete system for 2012 Mustang GT ?

LuisQuian Year: 2012 Model: GT

Question Resolved
Good Question (0) (0)
  • I have the Outlaw exhaust on my Shelby and I love them. They're loud and throaty without being too loud. Great bang for the buck!

    Helpful (0) (0)

    GT500Frank Year: 2011 Model: GT500

    Top 1000 Contributor

Show 1 more answer

can some one give feed back on sound compared to stock 2012 GT 500 want louder more aggressive deep sound

Sjewell Year: 2012 Model: GT500

Question Resolved
Good Question (0) (0)
  • Yes, the sound is on the 2012 GT500 is more deep, bolt, and agressive than the stock SVT mufflers. I recommend this product for your GT500.

    Helpful (1) (0)

    Best Answer

    sant51sw Year: 2012 Model: GT500

Show 2 more answers

Reviews (100+) Write a Review

  • 5 Stars .85 85%
  • 4 Stars .14 14%
  • 3 Stars .01 1%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.8

out of 5 stars

98 Customers Recommend this Product

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume: 4.841584 4.8/5
  • Exhaust Note: 4.851485 4.9/5
  • Fit & Finish: 4.683168 4.7/5
  • Bang For Your Buck: 4.841584 4.8/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    January 28, 2012

    Flowmaster Outlaw Axle-back for 5.0

    If you want an aggressive muscle car, one that sounds like a 60's era, you need these mufflers! I turn heads everywhere I go with this system. It is louder than stock and has a slight drone at 2K RPM's. It's not so bad that you can't have a conversation. One thing I particularly love about these is rumble when you let off the accelator and coast. Any video you see on the Internet with these does NOT do them justice! For the price especially, these are the best aggressive axle-backs on the market!

    Top 1000 Contributor

    xSMITHI3x

    Year: 2011 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 Granbury, TX

    Helpful (8) (0)

  • 5/5 Yes, I recommend this product

    September 26, 2012

    Very good, but not perfect.....

    I've had the FRPP GT500's, Kook's, Roush, and now the Flowmaster axlebacks, OVERALL, the Outlaws are my favorite! The GT500's and Kook's had better exhaust TONE at WOT, but were too quiet during normal driving. The Roush were the loudest at WOT, but sounded terrible, IMO. VERY raspy(4K and above)! They sounded good under normal driving, though. Now to the Outlaws. The tone is magnificent during normal driving; deep and the loudest out of the four I've had, but nothing obnoxious. The Outlaws aren't quite as loud as the Roush at WOT, but close. They're raspy as well, but not as bad as the Roush. There is some drone with the Outlaws, but nothing crazy. I actually like it! So, the Outlaws sound great under normal driving, semi-raspy at WOT(4K and above), but have the aggressiveness/loudness, overall, that I prefer. I wish there was an exhaust that had the loudness of the Outlaws, but no rasp at all like the GT500's/Kooks. However, with the stock cats and mid-pipe, the Outlaws are the best thus far! If you have any questions, feel free to email me: bruins17@gmail.com Mark

    Mark17

    Year: 2012 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Pasadena, CA, USA

    Helpful (9) (1)

  • 4/5 Yes, I recommend this product

    March 08, 2012

    Flowmaster Outlaws

    Love the sound and overall product. Only one thing I did not like with the particular set I received is that the driver side tip was welded slightly to the right so the flowmaster emblem and drain hole are not exactly centered. I think it may be a factory defect for this particular set. Other than that, it's great.

    JHab

    Year: 2012 Driving Style: Street / Strip 'Stangs I have owned: 3 USAF

    Helpful (7) (0)

    • Response from AmericanMuscle

      It does sound like a factory defect as you mentioned. Please give us a ring and we can get you squared away with a replacement!

      Lisa , Content Specialist

  • 5/5 Yes, I recommend this product

    April 01, 2013

    This is how I wanted my GT500 to sound!

    Like I said in the title- I wanted my '12 GT500 to sound more like the old days and my '66 and '69 Mustangs did. This'll do it! Wakes up the birds when you start up and gives you a nice tune when driving normal... but romp on the gas and that's when everything comes to life! The Outlaw axle backs are all I need to make those 550 horses come to life............ for now- of course!

    550Monster

    Year: 2012 Model: GT500 Driving Style: Daily Driver 'Stangs I have owned: 4 Whitesboro, NY, USA

    Helpful (3) (0)

  • 5/5 Yes, I recommend this product

    April 11, 2012

    2012 GT 5.0 axle back flowmaster outlaws

    Install only took me 45 minutes for both sides. The sound is amazing over the stock mufflers, but there is a slight drone at highway speeds. I usually shift gears, crack the window, or turn up the radio if it bothers me which normally it doesnt.

    MikeF

    Year: 2012 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 El Paso, Tx

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    February 11, 2012

    this product sounds mean

    i would recommend this exhaust for everyone. it sounds good and really loud

    mattboss

    Year: 2012 Model: Boss Driving Style: Show 'Stangs I have owned: 3

    Helpful (2) (0)

  • 4/5 Yes, I recommend this product

    November 19, 2011

    very agressive exhaust system

    I purchased these because I got a really good deal on them and decided to change up the sound a little. My previous setup was a lethal o/r x pipe and Roush. It sounded good but the tone wasn't really there. I put these on and now it has a deeper idle but isn't as loud as the Roush when you get on it. They are still really loud but better tone. The only downside is that they do drone a little but Idk if they do or not without an x pipe, doesn't bother me though so im happy with these.

    steven

    Year: 2011 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 2 columbus, ohio

    Helpful (2) (0)

  • 5/5 Yes, I recommend this product

    July 08, 2013

    First start-up said it all

    This exhaust has a very mean sound which to me is best on start-up. I was in my garage and quickly put the pedal to the floor when I was showing a friend, and wow . . the walls simply shook. You will have quite a bit of interior noise and a rather loud drone at highway cruising speed, but a quick installation of some sound deadening in the trunk alleviated most of the issues so now it sounds very nice inside the car. My first installation of an exhasut on any car, and it was much easier than I expected.

    Skinny83

    Year: 2012 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 TX

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    July 25, 2012

    Great sound

    These flowmasters are awesome, and they are loud. They really give my stang the muscle car sound it should have. Everyone I know gives it a two thumbs up. I drove a 5.0 with The Roush mufflers and debated on getting them; however the flowmasters were on sale. I'm glad i got them, in my opinion, these sound way better.

    Steve210

    Year: 2011 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Texas

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    July 22, 2012

    Amazing Sound!!

    These Mufflers Completely woke up my 2013 5.0. They sound incredible! I definitely recommend these to everyone. I can hear the power between every shift! only complaint is that they were a little nicked up when i received them.All in all great product. I buy everything for my Coyote from AM!!

    Top 1000 Contributor

    13GHGGT

    Year: 2013 Model: GT Driving Style: Street / Strip 'Stangs I have owned: 5 Ohio, USA

    Helpful (1) (0)

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