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

Market Price $475.70 You Save 12% ($54.73)

$420.97

FREE Shipping
  • Item 18405
  • MPN# 17116

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Aggressive Flowmaster Sound
  • Super 44 Series Mufflers
  • Mandrel-Bent Tubing
  • Durable Aluminized Steel Construction
  • Fits 1987-1993 GT Mustangs
Flowmaster Sound . The Flowmaster American Thunder Cat-Back exhaust system with its mandrel bent tubing will improve your 1987-1993 GT Mustangs exhaust flow for an increase in power, and their included Super 44 Series Mufflers will improve your exhausts sound for a deeper throatier muscle car exhaust note.

Quality Construction. Constructed from mandrel bent 2.5" 16 gauge aluminized 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.

Fitment. This Flowmaster American Thunder Cat-Back exhaust system is designed specifically for the 1987 to 1993 GT Mustangs for both great a fit and great sound.

Fitment: 1987 1988 1989 1990 1991 1992 1993 Details

What's in the Box
Hardware included:
  • (2) Clamps, Attached Hangers
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: Aluminized Steel Tip Material : Aluminized Steel
Piping Size: 2.5" Tip Size: N/A
Muffler Type: Chambered Fitment: 87-93 GT Mustangs
Will it fit my Mustang?
  • Foxbody - 87, 88, 89, 90, 91, 92, 93

Fits GT Only

Most Helpful Reviews

5/5
excellant sound

My mustang has that distinct mustang sound now. Mean and powerful.

Helpful (1)

5/5
NICE

This exhaust is very nice. Sounds great with my off road H-pipe. I ordered this on the 9th and got it the 10th with the standard shipping. Fast!

Helpful (9)

Overall Rating 5 out of 5 stars
Read All 23 Reviews

Customer Photos (3) Submit Your Photo

View All 3 Photos

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3 Questions / 3 Answers

Ask a Question

Will this Catback mount to a stock h-pipe?

88gtconvert

  • Yes it will! I just installed the cat back kit to a completely stock 91 GT.

    nickb61

    Good Answer (1) (0)

Answer This Question I need this answered (0) (0)

Hi will this exhaust fit my 88 gt 5,0 convertible

norwegianconsul

  • The Flowmaster American Thunder Cat-Back Exhaust (87-93 GT) will fit your 1988 GT convertible. This exhaust will fit any GT from 87-93.

    Ricky36

    Good Answer (0) (0)

Question Resolved

Will the American Thunder Catback exhaust system fit with BBK's long tube headers?

OneSick5oh

  • The Flowmaster American Thunder Cat-Back Exhaust are design to mount in the factory mid-pipe location. The BBK long tubes and mid-pipe meet in the stock location, so this cat-back will work well.

    AMJEFF

    Good Answer (0) (0)

Question Resolved

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Customer Reviews (23) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Afternoon

Installation Cost:$100-$250

  • Loudness / Volume 4.666667 4.7
  • Exhaust Note 5 5
  • Fit & Finish 4.8 4.8
  • Bang For Your Buck 4.866667 4.9



  • 5/5

    Installation Time: Afternoon

    August 15, 2013

    excellant sound

    My mustang has that distinct mustang sound now. Mean and powerful.

    kkuz87

    Year: 1987 Submodel: GT Barrington, IL, USA

    Helpful (1) (0)

  • 5/5

    September 15, 2009

    NICE

    This exhaust is very nice. Sounds great with my off road H-pipe. I ordered this on the 9th and got it the 10th with the standard shipping. Fast!

    Stangguy

    Helpful (9) (0)

  • 5/5

    February 22, 2010

    AW,,,, SOME SOUND !

    It took me about 6 hour's to install this system. Dad gum knuckle buster!!!! But Hay call me slow with A socket set and Saw-Saw. My Stang sure ant slow. It sure talk's to me now. Great Rumble & Sound.

    Mark

    Helpful (8) (0)

  • 5/5

    August 10, 2009

    Great Exhaust

    The exhaust is great and is an easy install. Everything that I needed was in the box and ready to install. Great price and free shipping made it even more worth it. Keep up the great service americanmuscle i have a 1988 fox body gt with t tops and this has been my website of choice for just about everything i have purchased for my car.

    CJS5.0

    Year: 1998 Submodel: GT

    Helpful (11) (2)

  • 5/5

    March 31, 2011

    American Thunder exhaust

    Very happy With the system, flowmasters never disappoint. The install was pretty easy and the mendral bent tubing is of exceptional quality. Would absolutely purchase again. On a side note before installing check to make sure all your exhaust hangers are still there and purchase new rubber hangers for the tips out back. Your stock one will likely crumble apart.

    Adam

    Year: 1990 Submodel: GT

    Helpful (5) (2)

  • 5/5

    Installation Time: Afternoon

    January 07, 2015

    American Thunder for the perfect sound

    This kit came with everything I needed for a smooth install and a perfect fit. The sound is dead on what i wanted when I ordered this product (which got to my house very quickly AND FREE!). The sound is the perfect Mustang sound that I dreamt of.

    nickb61

    Year: 1991 Submodel: GT Athens, GA, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    June 30, 2014

    Easy install.

    My Flowmaster cat back system arrived quickly as my orders usually do from American Muscle. I installed the system in my 1989 Mustang GT in my driveway. The fit was great as usual.

    a50ina50

    Year: 1989 Submodel: GT Delran, New Jersey

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    July 04, 2013

    Love this Flowmaster catback exhaust!

    My mechanic said the installation went without a single hitch. This system really releases the wild side of my 'stang. I absolutely love the deep, resonant "Flowmaster" tone this system produces. At speed, there is no droning. I have only had this system installed a couple of days now, and have received numerous compliments on how nice the car sounds. Thanks to Flowmaster, and American Muscle, for an outstanding product.

    Garcon

    Year: 1987 Submodel: GT Kendallville, IN, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    July 27, 2012

    FLO-DRONE!!

    This is an amazing exhaust that went right in. When it showed up in smaller boxes I thought it would be hard work but it bolted right in. I used the Pypes Catted X-Pipe (79-95 5.0L) and Ford Racing Double Hump Adjustable Transmission Crossmember with it. I went home from work with an exhaust leak and plugged cats, tinkered in the garage for an afternoon, and went back the next day turning heads and getting compliments. This is an awesome upgrade at a fantastic price. I won't go anywhere else for parts.

    KleineAngst

    Year: 1985 Submodel: GT Ogden, UT, USA

    Helpful (1) (1)

  • 5/5

    Installation Time: Less than 1 Hour

    January 20, 2012

    Beautiful explosion of sound

    These exhaust are jus amazing. If you want loud uncontrolled sound...these exhaust are what you are looking for. Amazing when you step on the peddle especially in the High rpm. Just a amazing explosion of raw sound. Awesome flowmaster exhaust.

    Bushmaster03

    Year: 1989 Submodel: GT Orlando fl

    Helpful (1) (1)

  • 5/5

    August 19, 2011

    flowmaster exhaust

    we liked the fact it was free shippin and Flowmaster American Thunder Catback Exhaust was very easy to install. Every piece we needed was in one box did not have to buy any other products. would buy this product again.

    John Whalen

    Year: 1990 Submodel: GT

    Helpful (0) (1)

  • 5/5

    Installation Time: Afternoon

    August 19, 2013

    great sound

    this system makes a HUGE difference. after a few weeks i added an o/r h-pipe an WOW just about every where I go I get compliments and look's. With an o/r h-pipe an about 2000-2500rpm they have quite a bit of drone but it sounds awesome. And at an idle they can't be beat. needless to say my neighbors know when I leave for work, but at the same time can be kept quiet.

    Bryanthehunter

    Year: 1987 Submodel: GT Kent, WA, USA

    Helpful (0) (1)

  • 5/5

    Installation Time: Afternoon

    November 09, 2016

    Great sounding exhaust

    received the exhaust within two days, awesome! Took a couple of hours to install and sounds great. Very happy with this purchase

    Bob

    Year: 1989 Submodel: GT

    Helpful (0) (0)

  • 4/5

    August 03, 2016

    Easy install

    Exhaust went on very easy. Also gave a nice Rumble to the car sounds like it should the only negative thing is the hardware is very weak that comes with the kit. Other than that I would have given it 5 stars

    oxford1970

    Year: 1989 Submodel: GT

    Helpful (0) (0)

  • 5/5

    July 21, 2016

    Flowmaster Cat Back

    Love my Flowmaster Cat Back exhaust. Fit perfectly and sounds great. Installation was a breeze. Came with eveything I needed. Thanks American Muscle.

    Zeus

    Year: 1988 Submodel: Other

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    December 23, 2015

    A unbelievable deal!!!

    I love this exhaust sounds excellent. Was quick to install looks good coming out the tail of my car. Just a overall good buy, reasonable price, and shipped very fast. I love it!!!

    Faithfully973

    Year: 1991 Submodel: GT Newark, Nj

    Helpful (0) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    May 05, 2014

    Great fit, fast shipping

    Great exhaust, was on sale. Fit with no issues. Great sound, as always with flowmasters. Shipping was fast to Canada Thanks AM!.

    Moore

    Year: 1990 Submodel: GT

    Helpful (0) (0)

  • 5/5

    Installation Time: Full Day

    June 23, 2013

    Exactly what I wanted.

    Combined with the BBK off road x pipe this system gave my mustang the exact sound I was looking for. We did the entire header back exhaust and smog pump delete in about 6 hours. Love the set up!

    JayV

    Year: 1990 Submodel: GT MA

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    August 02, 2012

    great sound

    Item is greatly priced and sounds great. Highly recommended.

    chris92convertible

    Year: 1992 Submodel: GT Staten Island, NY, USA

    Helpful (0) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    July 26, 2012

    PONY UP and get the American Thunder cat-back system!

    If you want your fox body 5.0 Mustang to SOUND like a Mustang, buy this product. NOW! I have an '89 convertible with a 5 speed, and I LOVE the sound with the top up AND down. Now, when I'm rollin' in my 5.0, with my rag-top down so my hair can blow #thanks Vanilla Ice#...it is clear that an 80's muscle car is on its way. Thanks American Muscle for great products and great pricing!

    GT4TB

    Year: 1989 Submodel: GT Apple Valley, MN, USA

    Helpful (0) (0)

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