1986-93 Mustang Flowmaster American Thunder Catback Exhaust Kit - Stainless LX 5.0 by Flowmaster

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  • Flowmaster Mustang American Thunder Catback Exhaust Kit  - Stainless (86-93) 5.0 817213
  • Flowmaster Mustang American Thunder Catback Exhaust Kit  - Stainless (86-93) 5.0 817213
Flowmaster Mustang American Thunder Catback Exhaust Kit  - Stainless (86-93) 5.0 817213
  • Flowmaster Mustang American Thunder Catback Exhaust Kit  - Stainless (86-93) 5.0 817213
  • Flowmaster Mustang American Thunder Catback Exhaust Kit  - Stainless (86-93) 5.0 817213

Improve throttle response, sound, and power with this stainless steel 1986-93 Mustang Flowmaster American Thunder catback exhaust kit!

Item #FLO-817213
MPN# 817213

Your Price: $563.27

Market Price:$714.85
You Save 21.20 % ($151.58)

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


  • American Thunder Mufflers
  • 409 Stainless Steel Construction
  • 2.5" Polished Stainless Steel Tips
  • 2.5" Mandrel Bent Tubing
  • Made In The USA

What's in the Box

  • (2) Super 44 Muffler Assemblies w/ Flow Tubes
  • (2) Tailpipes w/ Stainless Steel Tips
  • (2) Exhaust Clamps
  • (4) Hanger Keepers

Made in the USA

Product Description

Flowmaster Stainless Steel American Thunder Catback
Quickly, and easily, bolt on Flowmaster's signature sound to your Fox with this stainless steel, 1986-93 Mustang American Thunder catback exhaust kit! Featuring the same great performance and sound as Flowmaster's 17213 part number, this catback is finished in 409 Stainless Steel, and backed by a limited lifetime warranty! Along with the signature sound, the increased diameter tubing improves horsepower, torque, and throttle response! Flowmaster's American Thunder system delivers a moderate to aggressive interior, and exterior, tone; which is best suited to the Mustang enthusiast who wants their performance to be heard!

Flowmaster Quality
Flowmaster exhaust products are proudly made in the U.S.A. and the quality shows in this American Thunder catback. With easy installation in mind, this catback exhaust system is mandrel bent for maximum flow, and a precision fit! Constructed with 2.5" tubing, this catback flows much better than your factory 2.25" exhaust, for increased power and torque. Flowmaster's Delta Flow, Super 44 series mufflers provide a powerfully rich tone, and is their highest performing, 2-chamber muffler! A 409 stainless steel finish is utilized on this kit for corrosion protection that lasts. The 2.5" tips have a polished finish that looks great coming out of your rear bumper! Flowmaster backs this kit with a limited lifetime warranty!

Fitment Note
Will fit 1993 Cobra with minor modification.

-Fits 1986 Mustang GT
-Fits 1986-1993 Mustang LX

Flowmaster Exhaust Warranty - Click Here

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  • Product Videos

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

    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!

    Customer Photos (2)

    Vehicle Applications

    Ford Mustang - 1986 (86) - 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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