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Flowmaster American Thunder Cat-Back Exhaust (94-97 GT, Cobra)

37 Reviews
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  • Item #18406
  • MPN# 17212

  • Market Price $537.85
  • You Save 12% ($61.88)
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  • Aggressive Flowmaster Sound.
  • Super 44 Series Mufflers.
  • 2.5" Polished Stainless Steel Tips.
  • Mandrel-Bent Tubing.
  • Durable Aluminized Steel Construction.
  • Fits 1994-1997 GT and SVT Cobra Mustangs.
Flowmaster Sound .The Flowmaster American Thunder Cat-Back exhaust system with its mandrel bent tubing will improve your 1994-1997 GT or Cobra 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 Cat-Back features Super 44 Series chambered mufflers with 2.5" diameter OEM style polished stainless steel tips for muscle car looks and sound.

Application. This Flowmaster American Thunder Cat-Back exhaust system is designed to fit the 1994-1997 GT and the 1994-1997 SVT Cobra Mustangs for both great looks and great sound. Includes hangers and all necessary hardware for installation.

Fitment: 1994 1995 1996 1997 Details

What's in the Box
Hardware included:
  • (2) Mufflers
  • (2) Tailpipes
  • (1) Parts Kits
  • (2) Saddle Clamps
  • (4) Hanger keepers
  • Installation instructions
Installation Info
Tech Specs
Cat-Back Exhaust Specifications
Piping Material: Aluminized Steel Tip Material : Polished Stainless Steel
Piping Size: 2.5" Tip Size: 2.5"
Muffler Type: Chambered Fitment: 94-97 GT and Cobra Mustangs
Will it fit my Mustang?
  • Cobra - 94, 95, 96, 97
  • GT - 94, 95, 96, 97

Most Helpful Reviews


Love them! It took me an afternoon to put in these and BBK cats. I replaced everything from the headers back. Perfect fit for my 95 GT! I did not want an extremely loud system and they sound perfect. Very ...

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Helpful (1)


There nice but they were not perfect to each other. One was angled! But overall I like them and would buy them again.

Helpful (1)

Overall Rating 4.6 out of 5 stars
Read All 37 Reviews

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2 Questions / 3 Answers

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will this fit on a 94 gt convertible


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Is this compatible with the Flowmaster catted H-pipe?


  • The Flowmaster American Thunder Cat-Back Exhaust (94-97 GT, Cobra) will not be a direct bolt on with the Flowmaster Catted H-Pipe (94-95 5.0L), item # 18468, ( The Cat-Back Exhaust features 2.5" 16 gauge tubing while the H-Pipe has a 2.25" 16 gauge tubing. These can be installed together with some modifications and welding which we recommended having done professionally.


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Customer Reviews (37) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Loudness / Volume 4.37037 4.4
  • Exhaust Note 4.740741 4.7
  • Fit & Finish 4.666667 4.7
  • Bang For Your Buck 4.703704 4.7

  • 5/5

    Installation Time: Afternoon

    December 03, 2015


    Love them! It took me an afternoon to put in these and BBK cats. I replaced everything from the headers back. Perfect fit for my 95 GT! I did not want an extremely loud system and they sound perfect. Very nice low rumble that turns heads.


    Year: 1995 Submodel: GT Tampa Bay, FL

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    September 10, 2011


    There nice but they were not perfect to each other. One was angled! But overall I like them and would buy them again.


    Year: 1995 Submodel: Cobra wa

    Helpful (1) (0)

  • 5/5

    December 13, 2009

    95 mustang gt/Flowmasters

    Flowmasters live up to there name. They sound bad@$$. For even more power and sound i would recommend The BBK equal length shorty headers for the 94/95 5.0 with the BBK O/R H-pipe. All those togethor my car sounds bad ass. Its got that dont mess with me low idle tone and screams at high RPM's. Great product easy to install. Will need tow new clamps. The ones they give are cheap and break. But thats no biggy.


    Year: 1995 Submodel: GT

    Helpful (17) (2)

  • 5/5

    August 05, 2009

    Great Exhauar

    Always want an aggressive sounding exhaust. One that turned people's heads. This is exactly that, with a nice power boost too.


    Helpful (6) (0)

  • 4/5

    Installation Time: Afternoon

    April 12, 2012

    Deep Sound Easy FIT

    Easily installed in only a few hours. Fit is as expected. Requires only a little patience when positioning. This product was installed on a six cylinder and connected via an H-pipe adapter. Sound produced is a deep growl. Very nice.


    Year: 1996 Submodel: V6 Coral Springs, FL, USA

    Helpful (5) (0)

  • 4/5

    Installation Time: Afternoon

    March 15, 2012

    Gowls but no scream

    Overall I'm pleased with the product, but not without a few downsides. This has a nice deep tone at idle, and really growls when I give it some punch. It's not head turning loud so it won't break eardrums (or upset neighbors if I come home late), but it isn't a purring kitten either. I'd call it right down the middle loud. Personally I'd like a bit more rumble volume but that's just my taste. Install wasn't too bad, although after installing the mufflers, getting the pipes in the mufflers really tested my patience. Even though the directions state to tighten the clamps on the mufflers, leave them loose enough to wiggle the pipes in before locking everything down tight. Had to adjust and tighten things down again after a test run around the neighborhood, I didn't leave 3/4 of an inch between the pipes and frame, but after that, she sings like a tiger. Thanks again AM, excellent delivery and product as usual. You guys are the best!!


    Year: 1995 Submodel: GT Durham, NC

    Helpful (5) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 09, 2013

    Well Worth It!

    I ordered this and the pacesetter adapter kit for the v6 and I'm very happy I did! I took these to a shop to have it installed and it took about 2 and a half hrs. Now my v6 has a nice rumble to it ! Thanks American Muscle, you've made me very happy with your fast shipping and excellent customer service!


    Year: 1995 Submodel: V6 West Palm Beach, FL, USA

    Helpful (3) (0)

  • 5/5

    May 09, 2010


    Love the new sound for my 96 Cobra! Get this!


    Year: 1996

    Helpful (8) (4)

  • 4/5

    September 07, 2009

    Catback System

    Definitely helps the sound, but ur also gonna want to purchase a different h-pipe or x-pipe to get a perfect sound.


    Helpful (7) (4)

  • 1/5

    Installation Time: Afternoon

    May 27, 2014

    So quiet!!!!!!

    I was so surprised how quiet this was I was so upset after reading all the reviews and listining to the sound on you tube . I was praying that there was a break in period but after more research found that to not be true. I had it installed by a pro now I am thinking take it off and sell it but I still loose I am very disappointed and hope to hear from American muscle soon. I have gotten many many things for my 4.6 gt 1997 from your company!


    Year: 1997 Submodel: GT Centreville Virginia

    Helpful (1) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    September 10, 2013

    Love the sound and peformance

    Easy install matched up perfect !!! I spot welded where pipe fits to muffler !! clamp would not hold it tight enough to keep it from turning. instructions also said to do this . Worked perfect !! Great service and delivered on time Thank's American Muscle Great Job.... Mark....


    Year: 1994 Submodel: Cobra Mazomanie Wi

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    August 14, 2013

    Flowmaster howling whine

    No sure how I managed it but my American Thunders Cat back if done right can actually release a high pitched whining howl, which I love dearly. The howl used to be higher pitched with stock headers, but since I switched to BBK shorties, its even more pronounced and deeper. Further still I upgraded my cylinder heads and it just gets better. By keeping the RPS low I can sneak by, and then turn it loose, hah, its fun to surprise folks. 1994 GT vert, 4.6 ltr w/04 PI heads, BBK/Edelbrock TB, BBK shorty headers, Steeda CAI under hood, BBK catted x-pipe, Flowmaster American (super 44) Thunder exhaust. Over 279 RWHP dyno'd.


    Year: 1997 Submodel: GT Spring Lake, NC, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    August 01, 2013

    Sounds mean with an O/R H

    Went from straight pipes after the stock mid pipe to an O/R H pipe and the Flowmaster cat back and it sounds 100 times better. A really mean tone that screams over 3000 rpms but is mellow enough when you stay out of it. This is probably the best setup for your money and the tips sticking out from underneath my black bumper looks awesome. I had a local shop install it all for only $100 and the fit was perfect. I did this and a tune at the same time so the sound difference and the extra pep it has from the mid pipe make it a completely different car. For anyone wondering, cruising at 70 with 3.27 gears with the windows up produces nearly no cabin noise. I've not noticed any drone at all with these mufflers as I've heard others complain of and the tone did get a bit deeper and smoother after the "break in" period.


    Year: 1996 Submodel: GT Ohio

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    February 06, 2012

    Looks and sounds good

    I recommend this product to anyone that wants that American Muscle sound. It's not loud at idle, but it screams as soon as you hit the gas


    Year: 1994 Submodel: Cobra

    Helpful (1) (0)

  • 5/5

    August 02, 2011




    Year: 1997 Submodel: GT

    Helpful (1) (0)

  • 5/5

    July 20, 2011

    great sound, nice power boost

    The American thunder sound is awesome. Very classic muscle car sounding. If you like the exhaust louder, get this and people will know when you are coming. American muscle is the best site for your stang!


    Year: 1996 Submodel: GT

    Helpful (1) (0)

  • 5/5

    September 07, 2009

    Product & Service

    Your products and service are first class. Your price on my cobra cat back by Flowmaster was the lowest around. An added bonus was the free shipping which no others offerd. Delivery was faster than expected. Thanks again, Jim Ganiere

    Jim Ganiere

    Helpful (3) (2)

  • 4/5

    August 12, 2016

    Use band clamps

    Overall fit quality look and sound are very good. Overlap pipe lengths are to short and required band clamps to make joint


    Year: 1997 Submodel: Cobra

    Helpful (0) (0)

  • 3/5

    July 17, 2016

    Great Exhaust "BUT"

    Love the Sound but when installing to my BBK H-pipe the Exhaust was about 3 inch shorter making it where I had to take it to a Exhaust shop to have them rework and add some pipe to make a it fit. over all I give this Exhaust system a 3 Star.


    Year: 1997 Submodel: Cobra

    Helpful (0) (0)

  • 3/5

    July 10, 2016


    On my 1996 Mustang- the passenger side went well,but the driver side was a real pain.The bell on the muffler pipe wouldt fit around the ball on the cat pipe,it butted into the ball. had to use heat and ballpean hammer to open it up to get it to seal.


    Year: 1996 Submodel: GT

    Helpful (0) (0)

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