Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
1-877-887-1105
Every day 8:30AM EST - 11:00PM EST
Win Any Wheel & Tire Package! Enter Daily

Flowmaster American Thunder Cat-Back Exhaust - Stainless Steel (87-93 GT)

Market Price $617.99 You Save 12% ($71.93)
Our Price

$546.06

FREE Shipping

  • Item 18447
  • MPN# 817116

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Aggressive Flowmaster Sound
    • Super 44 Series Mufflers
    • Mandrel-Bent Tubing
    • 409 Stainless Steel Construction
    • Fits 1987-1993 GT Mustangs
    Flowmaster Sound. Give your Mustang that unmistakeable Flowmaster sound with a nice power boost by installing a American Thunder catback Exhaust system. Featuring mandrel bent tubing this Flowmaster system will improve exhaust flow for an increase in power, and the included Super 44 Series Mufflers will improve your exhausts sound for a deeper throatier muscle car exhaust note.

    Stainless Steel Construction. Constructed from mandrel bent 2.5" 409 stainless steel tubing for it's corrosion resistant properties the Flowmaster American Thunder catback features Super 44 Series chambered mufflers for that classic muscle car sound.

    Application. This Flowmaster American Thunder stainless steel Cat-Back exhaust system is designed specifically for use on the 1987 to 1993 GT Mustangs for great looks and great sound.

    Fitment: 1987 1988 1989 1990 1991 1992 1993 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (2) Muffler assemblies
    • (2) Over axle pipes
    • (2) Exhaust Tips
    • (2) Clamps
    Installation Info
    Tech Specs
    Cat-Back Exhaust Specifications
    Piping Material: 409 Stainless Steel Tip Material: 409 Stainless Steel
    Piping Size: 2.5" Tip Size: N/A
    Muffler Type: Chambered Fitment: 87-93 GT Mustangs
    Will it fit my Mustang?

    You Might Also Like

    Customer Photos

    Questions & Answers (2)

    2 Top Rated Questions

    Can I get stainles steel super 50 cat back

    • While not in stainless steel we do have this here in terms of a super 50 cat back: https://www.americanmuscle.com/flowmaster-force2-catback-8793gt.html

    Helpful (0)

    Hi was wondering if the setup was in all about 7 feet long? Thanks

    • Hi,We do not have a exact length on this Flowmaster American Thunder Cat-Back, But I can tell you that the average Foxbody cat back is around 4.5- 5.5 feet long

    Helpful (0)
    Post Your Question

    Customer Reviews (4) Write a Review

    Overall Rating 4.8

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 4.5 4.5
    • Exhaust Note 4.75 4.8
    • Fit & Finish 4.75 4.8
    • Bang For Your Buck 4.5 4.5



    • 5/5

      Installation Time: Full Day

      June 19, 2016

      Flowmaster American Thunder Catback - Stainless Steel (87-93 GT)

      Great system. I installed mine with BBK shorty unequal length ceramic coated headers and BBK offroad X pipe from American Muscle. The combo is unbelievable. Not back firing, great sound and super tough. Thanks A.M.

      Cobra8541

      Year: 1993 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      August 13, 2015

      Flowmaster the master

      Hands down there is no sound on a FOX like a flowmaster. This went on my 93 and I couldnt be happier. Great quality and great sound. What more can you ask for.

      JoeHernandez2

      Year: 2006 Submodel: GT West Chester, PA

      Helpful (5)

    • 4/5

      Installation Time: Less than 1 Hour

      July 01, 2013

      Nice exhaust

      My original exhaust broke due to driving my car on a poorly maintained road. My car is all stock so I wanted to keep my new exhaust on the more subtle end with a slight upgrade. This was definitely the right answer. Slightly aggressive without being obnoxious. It fits my cars personality well.

      Justin89

      Year: 1989 Submodel: GT Detroit, MI

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      April 19, 2013

      Great sound completes my exhaust upgrade

      Love the sound of the thunder catback. Easy to install and can feel the power. I get plenty of looks as well. My pony sounds like a stud

      okiestang

      Year: 1989 Submodel: GT Oklahoma

      Helpful (5)

    Related Mustang Categories