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

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Flowmaster  Mustang American Thunder Stainless Catback Exhaust Kit  (87-93) GT 817116

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

Item #FLO-817116
MPN# 817116

Your Price: $529.97

Market Price:$693.00
You Save 23.53 % ($163.03)

  Ships from supplier by Friday, January 26

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


  • 2.5" Mandrel Bent Tubing
  • American Thunder Mufflers
  • 409 Stainless Steel
  • 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

Made in the USA

Product Description

Flowmaster American Thunder Catback
Add Flowmaster's signature sound to your Fox with this 1987-1993 Mustang GT American Thunder catback! 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 catback. 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

See what our customers have to say about this product!
Check out customer reviews.

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  • Product Videos

    Fox Body Mustang Exhaust Kit Installation: Flowmaster Cat Back & SVE Off Road H Pipe

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    Customer Photos (2)

    Product Reviews (4)

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    4 of 4 REVIEWS
    4 of 4 REVIEWS

    5 Stars   Amazing!
    By on 4/18/2015
    Image uploaded by David R. I got this a couple weeks ago and i couldnt be happier. the sound it makes when i accelerate is just music to my ears. the car has a sort of "hearbeat" kind of noise when siting in idle, just amazing. it went on so easily i was stunned. AMAZING PRODUCT.

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Outstanding fit
    By on 8/23/2014
    The sound is amazing so glad I bought this system I bought a BBK off road X pipe that completes the setup perfectly

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Quick delivery
    By on 9/1/2014
    Nice fit and very quick delivery

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Amazing muscle car sound!
    By on 11/28/2014
    Image uploaded by Keith W. Installed these mufflers over the weekend, easy bolt on, great fit, and the sound that flowmasters give your foxbody... Jammingly amazing!

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    Vehicle Applications

    Ford Mustang - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93)

    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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