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Flowmaster American Thunder Catback - Stainless Steel (99-04 Cobra)

8 Reviews
Our Price

$558.60

  • Item #18448
  • MPN# 817248

  • Market Price $620.99
  • You Save 10% ($62.39)
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Customer Photos
Features
  • Aggressive Flowmaster sound
  • 40 Series mufflers
  • 3" Polished stainless steel tips
  • Mandrel bent tubing
  • 409 stainless steel construction
  • Fits 1999-2004 SVT Cobra Mustangs
Description
Flowmaster Sound. Give your SVT Cobra 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 40 Series Mufflers will improve your exhausts sound for a deeper throatier muscle car exhaust note.

Quality Construction. Constructed from mandrel bent 2.5" 409 stainless steel tubing for it's corrosion resistant properties the Flowmaster American Thunder Catback features their 40 Series chambered mufflers with massive 3.0" diameter OEM style polished stainless steel tips for great muscle car looks and sound.

Application. This stainless steel Flowmaster American Thunder Catback exhaust system is specifically designed to fit the 1999 to 2004 SVT Cobra Mustangs with Independent Rear Suspension (IRS) for impressive looks and great sound.

Mustang Fitment: 1999 2001 2003 2004 Details

What's in the Box
  • (2) Muffler assemblies
  • (2) Over axle pipes
  • (2) Exhaust Tips
  • (2) Clamps
Installation Info
Tech Specs
Catback Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 2.5" Tip Size: 3.0"
Muffler Type: Chambered Fitment: 1999-2004 SVT Cobra Mustangs
Will it fit my Mustang?
  • Cobra - 99, 01, 03, 04

Most Helpful Reviews Read All Reviews

Overall Rating 4.9/5 Write a Review
5/5
American Thunder

All in all the product is great. I selected afternoon for install time based on whether or not you have a lift. I did it in my driveway with jackstands and it took the better part of an afternoon. Farthest

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Helpful (2) (0)

5/5
Flowmaster American Thunder Catback - Stainless Steel (99-04 Cobra)

This exhaust fits good and sounds good, but could be slighty louder. I would buy it again.

Helpful (1) (0)

Customer Photos (1) View All Customer Photos

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Reviews (8) Write a Review

  • 5 Stars .88 88%
  • 4 Stars .12 12%
  • 3 Stars 0 0%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.9

out of 5 stars

7 Customers Recommend this Product

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume: 4 4/5
  • Exhaust Note: 4.75 4.8/5
  • Fit & Finish: 4.5 4.5/5
  • Bang For Your Buck: 4.875 4.9/5
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  • 5/5 Yes, I recommend this product

    July 24, 2013

    American Thunder

    All in all the product is great. I selected afternoon for install time based on whether or not you have a lift. I did it in my driveway with jackstands and it took the better part of an afternoon. Farthest bolt to the passenger side off the header is a doosie. But if you only ordered the cat back this won't be a problem for you. I installed this cat back with a Magnaflow carted tru-x pipe. NY compliant. Once that bolt was free the rest was fitting it in and leveling it out to tighten it up. I would recommend this to anyone who wants to hear the true beauty of owning a piece of American Muscle. 2003 Mineral Grey Vert Cobra

    LexLuger

    Year: 2003 Model: Cobra Driving Style: Street / Strip 'Stangs I have owned: 3 NY

    Helpful (2) (0)

  • 5/5

    May 23, 2014

    Aggressive but not Overbearing

    I was looking for a little deeper sound, without annoying the neighbors (well, maybe a little). This catback provided what I was looking for. A little deeper sound to make it a little more like the Cobra it is, without it being too annoying for a car I drive on a regular basis. Maybe it'll help with the "Is that even a real Cobra?" I get for having a '99... Install wasn't too bad, the bolt spacing on the connection to the cats didn't have as much tolerance as I would have liked. I also had one hanger on the passenger side that was kind of stubborn to get up into, but in the end I was able to get everything lined up well. I'm a novice so take that into account, as my minor troubles may have just been chalked up to inexperience. I also have a new appreciation for the IRS this car has, as there was no up and over the axle to worry with. I'm happy with the result and got the sound I was looking for.

    99MDCobra

    Year: 1999 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 2 Maryland, USA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    August 26, 2013

    Awesome product!

    This was a great install. The sound was amazing! We were happy with the quality of the product. To top it off, we received a rebate from Flowmasters. This Cobra roars to life with our new pipes! We love it!

    DebbieK3

    Year: 2004 Model: Cobra Driving Style: Show 'Stangs I have owned: 5 Eau Claire, WI, USA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    November 09, 2012

    Flowmaster American Thunder Catback - Stainless Steel (99-04 Cobra)

    This exhaust fits good and sounds good, but could be slighty louder. I would buy it again.

    kmcg

    Year: 1999 Model: Cobra 'Stangs I have owned: 5 Williamsport, PA, USA

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    May 02, 2014

    Great sound!

    Installed on a 2001 cobra, sounds REALLY good. would recommend this product to any mustang owner. there is nothing like the sound of the 2 chamber flowmaster, gets your head turning!!

    SteveM

    Year: 2001 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 3 Connecticut, USA

    Helpful (0) (1)

  • 5/5 Yes, I recommend this product

    June 02, 2013

    Flowmaster American Thunder Catback - Stainless Steel (99-04 Cobra)

    I am pleased to say that the product installed exactly as described in the directions I down loaded from your site. I indicated "afternoon" but it was only a little more that an hour. We did use a torch to heat nuts to remove the old pipes, but were able to reuse the bolts and nuts to install the new pipes. I am very satisfied with this product and the installation.

    GrandpaBill

    Year: 1999 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 2 Chilton, WI 53014, USA

    Helpful (0) (1)

  • 5/5 Yes, I recommend this product

    August 06, 2014

    Its Flowmaster

    Replaced a 3" mac cat back off my 03 cobra with this and the sound and look are big improvement. Had to take the differential weight off due to passenger pipe hitting it but have not noticed any difference in driveline vibrations so I guess its ok, so -1 star for that.

    Droptop46

    Year: 2003 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 5+ Louisville, KY, USA

    Helpful (0) (0)

  • 4/5 Yes, I recommend this product

    July 03, 2013

    Fit and finish on this catback was great!

    Received this product quickly, took my time installing the catback in my garage, and was very easy. Have plenty of clearance for the exaust and no rattles or leaks. Just keep in mind that this hangs lower than stock, car is not lowered. Very happy with product.

    lawrence

    Year: 1999 Model: Cobra Driving Style: Show 'Stangs I have owned: 4 South Chicago suberbs

    Helpful (0) (0)

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