1986-93 Mustang Flowmaster American Thunder Catback Exhaust System LX 5.0L by Flowmaster

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Flowmaster Mustang American Thunder Catback Exhaust System (86-93) LX 5.0L 17113

Give your 86-93 Mustang LX a new attitude with this Flowmaster American Thunder Catback Exhaust System!

Item #FLO-17113
MPN# 17113

Your Price: $422.97

Market Price:$552.94
You Save 23.51 % ($129.97)

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  • Gives Your Mustang That Signature Sound
  • Increased Performance
  • Improves Exhaust Tone


  • Fully Welded Construction
  • H-Chamber Design
  • Aluminized Steel
  • Made In The USA
  • Fits 86-93 LX will fit 93 Cobra with Minor Modifications
  • 3 Year Warranty

What's in the Box

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

Made in the USA

Product Description

If you are looking to increase horsepower and get that signature 5.0 sound for your 86-93 Mustang Fox Body then look no further than LatemodelRestoration.com For the person who wants a complete catback dual exhaust system with an aggressive tone. With easy fit in mind, these American Thunder systems from Flowmaster are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the American Thunder benefits include improved throttle response, power and mileage. Designed for an easy fit, these Mustang exhaust systems include all necessary parts and hardware for easy installation.

Since Flowmaster mufflers use sound energy cancellation technology, you don't have to worry about "packing material" deteriorating and getting louder after as little as a few months. The interior case volume of the inside of a Flowmaster muffler is far superior to that of a "straight-pipe" or "straight-through" muffler design. Imagine filling a "straight-pipe" or "straight-through" muffler with water vs. filling a Flowmaster muffler with water. Which one do think would hold substantially more volume? The deflector in a Flowmaster muffler acts as a one way check valve eliminating reversion back to the engine and creates a low pressure area to help scavenge the exhaust. Flowmasters unique style of H-Chamber designs help control interior resonance inside the cab area of your vehicles. "Straight-through" muffler designs cannot. Flowmasters use fully welded construction for added strength and durability to last even when installed on high horsepower engines.

Flowmaster mufflers are made in the U.S.A.

- Fits 1986-93 LX will fit 93 Cobra with minor modification
- 2.5" Inlet / 2.5" Outlet
- Super 44 Series Mufflers
- Aluminized Steel Construction
- Aluminized Tips

Flowmaster Exhaust Warranty - Click Here

Related Articles

  • How To Install A Fox Body Cat Back Exhaust System (87-93)

    Adding a cat back from LMR to your Mustang will not only increase HP, but will also make you stand out from the crowd. If you are in the market an aggressive sound look no further than a Fox Body cat back exhaust. Follow along in this simple step by step installation to ensure proper fitment and get your Fox back on th... more

    Read more: 79 93 mustang , mustang

    Posted on 12/14/2016

  • 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 (5)

    Product Reviews (6)

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    6 of 6 REVIEWS
    6 of 6 REVIEWS

    5 Stars   Great fit and sound! LMR.com Expert Review!
    By on 4/16/2014
    I put this on my '89 LX to gain clearance on my wider 18x10 wheels as well as get a better sound and knocked out two birds with one stone. The old tailpipes were dangerously close to the tire and these new Flowmaster tips sat far enough away that I didn't have to worry about it. The sound was a nice crisp sound that turned heads everywhere.

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Flowmaster all day long
    By on 3/23/2015
    Image uploaded by Thomas H. This isn't my first Flowmaster exhaust system and it won't be my last. Love the sound, the quality is superb, and the installation is easy. I particularly like that this one has the aluminized tips instead of the shiny stainless ones; will help me achieve the sinister type look I'm going for as my car progresses. I love the fitment, Flowmaster really does a great job. I've owned other name brand exhaust and they are good to, but the install of the Flowmaster system has always went on so much easier as far as fitment goes in my opinion. Great job Flowmaster and thank you LMR!!!

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Best Products and Fast Shipping
    By on 12/20/2016
    So excited to hear my Ford Racing 302 run for the 1st time with this awesome exhaust. After 1 1/2 yeras doing a rottiserie resto. Should be soon now!

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Awesome Sound
    By on 12/28/2015
    Great fit and awesome sound. This is the signature sound I remember! LMR delivered fast as usual. Great product and great company.

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    4 Stars   sounds great
    By on 2/23/2015
    This system gave my 88 coupe that signature flow master sound.

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    5 Stars   Flow master
    By on 12/25/2014
    Very affordable exhaust easy install with classic sound

    Yes, I would recommend this item to a friend!

    Was this review helpful to you?

    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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