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2011-12 Ford Mustang 5.0L 5.4L Flowmaster Hushpower Axle-Back Exhaust System GT-GT-500 - S197

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Mustang Flowmaster Hushpower Axle-Back Exhaust System (11-12) 5.0L 5.4L
Unleash extra power on your 11-14 Mustang GT/GT500 with a Flowmaster Hushpower axle back exhaust.

Item# FLO-819109

Your Price: $503.99

Market Price:$554.38
You Save 10.00 % ($50.39)

In Stock!  


  • Increased Horsepower
  • Aggressive New Sound
  • Direct Bolt On Installation
  • 18lbs Lighter Than Stock Axle-Back!


  • Stainless Steel Construction
  • Utilizes Factory Hanger Mounts
  • Easy, Clamp-On Design
  • Hushpower Lifetime Warranty!
  • Polished 4" Tips
  • Made in the USA

What's in the Box

  • (1) Hushpower 3" Axle-Back Pair With 4" Polished Stainless Tips

Made in the USA

Product Description

Looking for the latest in exhaust system technology for your late model 2011-14 5.0L Mustang GT? The new Flowmaster 819109 Hushpower Axle-back system is where it can be found!

Increased Horsepower & Improved Exhaust Tone
These Hushpower Pro Series "Shorty" mufflers deliver an incredible, high performance sound befitting these true muscle Mustangs. Utilizing Flowmaster's patented Hushpower technology, this Mustang Exhaust system was developed and dyno tuned to provide maximum gains in exhaust system efficiency. The result is improved power and torque with fresh new sound and a moderate overall tone.

Flowmaster Lifetime Warranty!
The system is covered by Flowmaster's Lifetime Warranty! Constructed from durable 409S stainless steel, painted black, and finished off with awesome 4" polished tips branded with the Flowmaster logo. This system is an easy install using all factory mounting locations, no-special-tools-required.

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!

(5) Customer Photos

Customer Reviews

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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