2015-17 Mustang Flowmaster American Thunder Catback Exhaust Kit EcoBoost by Flowmaster

Details   |  Description   |  Videos
  • 2015 Mustang Ecoboost Flowmast
  • 2015 Mustang Ecoboost Flowmast
  • 2015 Mustang Ecoboost Flowmast
2015 Mustang Ecoboost Flowmast
  • 2015 Mustang Ecoboost Flowmast
  • 2015 Mustang Ecoboost Flowmast
  • 2015 Mustang Ecoboost Flowmast

Add aggressive Flowmaster sound to your 2015-2017 Mustang EcoBoost with an American Thunder Catback exhaust kit!

Item #FLO-817750
MPN# 817750

Your Price: $782.97

Market Price:$1,024.73
You Save 23.59 % ($241.76)

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  • Aggressive Exhaust Note
  • Improved Performance
  • Better Exhaust Flow
  • Made in the USA


  • 409S Stainless Steel
  • Uses Factory Hangers
  • 2.25/3" Tubing Diameter
  • Lifetime Limited Warranty

What's in the Box

  • (1) Outlaw Catback Exhaust Kit

Made in the USA

Product Description

Flowmaster American Thunder Catback Exhaust Kit
Bolt on some serious sound and additional horsepower with this Mustang Flowmaster American Thunder Catback Exhaust Kit. This kit starts as a 2.25" diameter pipe that runs back into a 3" Y-Pipe split flowing straight into 3" mufflers and exits the rear valance in a stylish 4" stainless steel tip! The increased diameter tubing increases exhaust flow to produce horsepower and torque for your turbocharged EcoBoost engine. The American Thunder mufflers included in this kit are sure to turn heads and flow at the highest level.

Installation Note
-Fits coupe and convertible body styles.

- Fits 2015-2017 Ford Mustang EcoBoost

Flowmaster Exhaust Warranty - Click Here

Product Videos

How To Properly Install Exhaust Band Clamp

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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