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2011-12 Ford Mustang 5.0L 5.4L Flowmaster Outlaw Axle Back Exhaust Kit GT-GT-500 - S197 by Flowmaster

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Mustang Flowmaster Outlaw Axle Back Exhaust Kit (11-12) 5.0L 5.4L
  • Flowmaster Mustang Outlaw Axle Back Exhaust Kit (11-12) GT-GT-500 5.0L 5.4L 817516
  • Flowmaster Mustang Outlaw Axle Back Exhaust Kit (11-12) GT-GT-500 5.0L 5.4L 817516

Add an aggressive sound to your 11-12 Mustang GT/GT-500 with a Flowmaster Outlaw axle back exhaust!

Item# FLO-817516

Your Price: $398.99

Market Price:$438.88
You Save 10.00 % ($39.89)

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  • Easy Install
  • Improved Throttle Response
  • More Power
  • Better Mileage


  • Aggressive Sound
  • Aluminized Steel Black Finish Mufflers
  • 3 Year Warranty

What's in the Box

  • (1) LH Axle Back Assembly
  • (1) RH Axle Back Assembly

Made in the USA

Product Description

Want more sound from your 2011-2012 Mustang? Get yourself the Flomaster Outlaw axle back exhaust and let your Mustang howl! Get better throttle response, more power and great sounds from your Mustang with this awesome axle back by Flowmaster! These Flowmaster Outlaw series Mustang Axle-Back exhaust systems are mandrel-bent for maximum performance and include specially designed mufflers. They deliver super-aggressive interior and exterior tones and are suited for the enthusiast who wants the most aggressive components that they can buy. The systems include hardware and tips, so installation is quick and easy.

Product Videos

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

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Customer Reviews

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3 of 3 REVIEWS
3 of 3 REVIEWS

  Sounds Great!
By on 2/19/2014
If you want your 5.0 to sound mean and to turn heads, this is the axle back you are looking for! Install was quick and easy on my '12 GT and I am very pleased with the fit and finish of these mufflers. For how loud it is, I am surprised how quiet they are cruising on the highway (not much drone). Thanks to Latemodelrestoration's fast free shipping I had them in two days. Plus I shed close to 30 pounds by swapping out the old mufflers. This has been my favorite modification and if you want your pony to sound as mean as it looks, go with Flowmaster outlaw axle back system.

Yes, I would recommend this item to a friend!

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  Great bang for the buck
By on 9/1/2013
I love this exhaust! It was the first mod I put on my '14 Mustang GT and it sounds great. It's a very aggressive tone and sounds great through the RPM band. There is a drone at 2k RPM when you're on the freeway, but it isn't too bothersome. I love this exhaust, none the less.

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  Awesome sound
By on 1/29/2014
Put these mufflers on my 11 Shelby GT500. Took about 30 minutes with jackstands. Fit perfect. Sound real aggressive with the rest of the exhaust factory. Polished tips were a nice touch.

Yes, I would recommend this item to a friend!

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  Great fit fast shipping
By on 6/16/2014
I bought these flowmasters outlaw for my 5.0 and they really made a difference in sound. They fit great. Look great. And sound great. 20 minutes to install.

Yes, I would recommend this item to a friend!

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Vehicle Applications

Ford Mustang - 2011 (11) - 2012 (12) - 2013 (13) - 2014 (14)

About This Brand

Flowmaster - The Exhaust Technology Company
Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's.

Through use of these dyno's, Flowmaster's engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers "to the ground."

Flowmaster also utilizes Spectrum Analyzers to fine "tune" the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmaster's dedication to quality is what makes them the exhaust industry leader for Latemodel Mustangs and SVT Lightnings!

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