2015-17 Mustang Flowmaster American Thunder Axle Back Exhaust GT by Flowmaster

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  • 2015 Mustang GT 5.0L Flowmaste
  • 2015 Mustang GT 5.0L Flowmaste
  • 2015 Mustang GT 5.0L Flowmaste
2015 Mustang GT 5.0L Flowmaste
  • 2015 Mustang GT 5.0L Flowmaste
  • 2015 Mustang GT 5.0L Flowmaste
  • 2015 Mustang GT 5.0L Flowmaste

Add classic Flowmaster sound to your 2015-2017 Mustang GT with an American Thunder Axle Back kit!

Item #FLO-817749
MPN# 817749

Your Price: $621.68

Market Price:$788.99
You Save 21.21 % ($167.31)

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  • Strong Exhaust Tone
  • Improved Performance
  • Better Exhaust Flow
  • Made In The USA


  • 3" Mandrel Bent Tubing
  • 409 Stainless Steel Tubing
  • 4" Polished Tips
  • Super 44 Series Mufflers

What's in the Box

  • (1) Axle Back Exhaust Kit

Made in the USA

Product Description

Classic Flowmaster Sound!
Give your 2015-2017 Mustang GT an aggressive exhaust sound with Flowmaster's American Thunder Axle Back exhaust kit! This kit gives your S550 Mustang the muscle car sound and performance you expect from Flowmaster. This Axle Back kit now has been updated to fit additional bracing for convertible models and continues to fit the coupe. This kit is constructed of 409 stainless steel tubing that is powder coated black that ends in a pair of 4" polished stainless steel tips that are sure to look great coming out of your rear valance. The kit is designed for an easy installation and includes all necessary parts and hardware for install to get your 2015-2017 Mustang sounding great in no time!

Installation Note
Will fit convertible & coupe Mustang.

- Fits 2015-2017 Ford Mustang GT

Flowmaster Exhaust Warranty - Click Here

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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Vehicle Applications

Ford Mustang - 2015 (15) - 2016 (16) - 2017 (17)

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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