1987-93 Mustang Flowmaster American Thunder Stainless Cat Back Exhaust Kit GT by Flowmaster

1987-93 Mustang Flowmaster  American Thunder Stainless Cat Back Exhaust Kit  GT
1987-93 Mustang Flowmaster  American Thunder Stainless Cat Back Exhaust Kit  GT
Fox Body Mustang Exhaust | Flowmaster American Thunder Catback

Improve throttle response, sound, and power with this 1987-1993 Mustang GT Flowmaster American Thunder Cat Back!

Item #FLO-817116
MPN# 817116

Everyday Low Price: $795.95

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Made in the USA


  • Signature Flowmaster Sound
  • Improves Throttle Response
  • Increased Performance
  • Lifetime Warranty


  • 2.5" Mandrel Bent Tubing
  • 409 Stainless Steel
  • Super 44 Mufflers
  • Made In The USA

 What's in the Box

  • 2) Muffler Assemblies With Flow Tubes
  • (2) Tailpipes with Stainless Steel Tips
  • (2) Exhaust Clamps
  • Install Instructions
  • Flowmaster Stickers
  • Warranty Card

Flowmaster American Thunder Cat Back

Add Flowmaster's signature sound to your Fox with this 1987-1993 Mustang GT American Thunder Cat Back! With easy fit in mind, these American Thunder systems from Flowmaster are mandrel-bent for maximum performance and flow! American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the Mustang enthusiast who wants their performance to be heard!

Flowmaster Quality

Flowmaster mufflers are proudly made in the U.S.A. and the quality shows in this American Thunder Cat Back. Constructed with 2.5", mandrel-bent tubing, this cat back flows much better than your factory exhaust. Flowmaster utilizes 409 stainless steel to ensure long-lasting performance! Designed for an easy fit, these Mustang exhaust systems include all necessary parts and hardware for easy installation.


  • Fits 1987-1993 Mustang GT

Flowmaster Exhaust Warranty - Click Here

  • Ford Mustang - 1987, 1988, 1989, 1990, 1991, 1992, 1993
  • Sub Models: GT
  • When using a BBK Midpipe and Flowmaster cat back exhaust system together, the driver-side lead pipe may not properly line up with the cat back exhaust due to manufacturing differences. Professional modifications may be required.

Fox Body Mustang Exhaust | Flowmaster American Thunder Catback

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!

California Residents:
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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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