Talk to a Mustang Expert
1-888-332-7930
M-F 9-9,Sat 9-5:30,Sun 12-4 ET

Free Shipping on Everything. Seriously. Details

Flowmaster American Thunder Catback Exhaust (99-04 Cobra)

11 Reviews
Our Price

$474.80

  • Item #18409
  • MPN# 17248

  • Market Price $527.99
  • You Save 10% ($53.19)
Out of Stock Notify Me
Free Shipping on Everything
Customer Photos
Features
  • Aggressive Flowmaster sound.
  • 40 Series Mufflers.
  • 3" Polished stainless steel tips.
  • Mandrel Bent Tubing.
  • Durable Aluminized Steel Construction.
  • Fits 1999-2004 SVT Cobra Mustangs.
Description
Flowmaster Sound .The Flowmaster American Thunder Catback exhaust system with its mandrel bent tubing will greatly improve your 1999 to 2004 SVT Cobra Mustangs exhaust flow for an increase in power, and their included 40 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 their 40 Series chambered mufflers with 3.0 " diameter OEM style polished stainless steel tips for great muscle car looks and sound.

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

Fitment: 1999 2001 2003 2004 Details

Won't fit? Add an exception

What's in the Box
Hardware included:
  • (2) Clamps
  • Installation Instructions
Installation Info
Tech Specs
Catback Exhaust Specifications
Piping Material: Aluminized 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

5/5
Flowmaster

Sounds great with O/R MAC Prochamber

Helpful (7)

5/5
Flowmaster

Sounds great. Was easy to install and has great fitment.

Helpful (5)

Read All 11 Reviews
Overall Rating 4.6 out of 5 stars

Customer Photos (3) View All Photos

You Might Also Like

2 Questions / 1 Answers

Ask a Question

would this fit on my 97 svt cobra,?

John21 Year: 1997 Model: Cobra

  • This exhaust is for Mustangs with Independent Rear Suspension. If your 97 Cobra does not have an IRS swapped in place for its stock Solid Rear Axle, then this will not properly fit your car.

    Wombozi Year: 2001 Model: Cobra

    Good Answer (0)

would it fit on my 97 svt cobra?

jondre Year: 1997 Model: Cobra

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

More Products You Might Like

Customer Reviews (11) Write a Review

Overall Rating 4.6

out of 5 stars

Installation Time:Afternoon

  • Loudness / Volume 4 4
  • Exhaust Note 4.857143 4.9
  • Fit & Finish 4.428571 4.4
  • Bang For Your Buck 4.714286 4.7



  • 5/5

    June 20, 2010

    Flowmaster

    Sounds great with O/R MAC Prochamber

    Greg Sapp

    Helpful (7) (0)

  • 5/5

    July 26, 2010

    Flowmaster

    Sounds great. Was easy to install and has great fitment.

    Darren R

    Helpful (5) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    October 06, 2011

    Flowmaster Catback

    I've had flowmaster on 3 of my previous mustangs and just purchased another catback for my 03 Cobra. I've heard all the other competitor's catbacks and I'm still a fan of flowmaster. The sound is aggressive without being over the top. When I think of what a muscle car should sound like, flowmaster nails it.

    Top 500 Contributor

    Featured

    Vince

    Year: 2003 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 5 Paso Robles, CA

    Helpful (1) (0)

  • 4/5

    Installation Time: Shop Install

    January 29, 2012

    Great Upgrade to Sound

    I have a 2003 SVT Cobra that the original owner put "glasspacks" on and the sound was annoying for me. I finally put the Magnaflow on and it sounds much healthier! The fit,price and product is always as advertised. Thanks.

    Smooth

    Year: 2003 Model: Cobra Driving Style: Show 'Stangs I have owned: 2 Tacoma,WA.

    Helpful (1) (6)

  • 5/5

    Installation Time: Less than 1 Hour

    August 31, 2015

    Flow Master

    Great exhaust, nice sound to it. Quite until you get on it after 3K. I liked how easy it bolted on. The only thing I didn't like was that they didn't provide exhaust clamps for the catback. Had to go to Autozone to purchase 2 1/2 inch clamps. Other than that I'm happy with the exhaust. No drone inside as well.

    Junior

    Year: 2003 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 2 South Bay, Ca

    Helpful (0) (0)

  • 3/5

    Installation Time: Afternoon

    June 01, 2015

    Great sound, fitment total package 3 stars

    Great sound for sure, just what I wanted. But I was disappointed when it arrived to find that unlike the pictures on the product, the system comes in two pieces per side that have to be connected with muffler clamps. That was some extra fiddling during installation and contorting to get it all aligned right, and now from the rear of my car I can see those muffler clamps under there. I can't get it welded either because fitment in getting them on was not as simple as bolting in, I had to slide the rear most section in the back mount, tip the connection from the xpipe down, and barely made them come together to get on, so if I got it welded, it would be in there for good. Overall a nice product with a nice sound, but was disappointed in fitment.

    BangedKnuckles

    Year: 1999 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 1

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    May 09, 2013

    Cat-back installation (Flowmaster) on 2003 SVT Cobra

    Fortunately, I have a lift. Removal took longer than assembly! Everything was very simple and foolproof. It brought the little Cobra to life! Didn't need the stainless as car is, (and will remain) in Texas. Hats off to your team!

    BlackieTx

    Year: 2003 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 2

    Helpful (0) (0)

  • 4/5

    Installation Time: Less than 1 Hour

    June 16, 2012

    not to shabby for the money spent!!!

    i was gonna go with slp1's cat back then thought back to when i had flowies on my old s10 and decided to give em another shot, and glad i did!! they were pretty easy to install and took me about an hour up on jack stands. the loudness isn't as loud as i thought it would be but still sounds amazing tho. at first they were kinda quite but after a couple weeks they seemed to get louder and louder so im pretty happy with them. they got this deep rumble to em thats simply awesome, they almost dont sound like flowmasters signature sound, more like glasspacks, but i think thats because of the four cats i got. all that stuff is still stock. the shinney tips give it a good look from behind too. it took two days for me to recieve them by ups as promised. if you want a good sound, this is the way to go for sure!!!!

    mrAndybean

    Year: 1999 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 1 New Florence, PA 15944, USA

    Helpful (0) (0)

  • 5/5

    Installation Time: Afternoon

    February 24, 2012

    flowmaster exhaust

    these fit really well, had no problems putting them on but when i started to tighten the nuts the muffler twisted down a little so i put a small jack under the muffler so it wouldnt twist down other than that i had no problems.

    TayCobra

    Year: 1999 Model: Cobra Driving Style: Daily Driver 'Stangs I have owned: 1 Yukon, OK

    Helpful (0) (0)

  • 5/5

    June 11, 2011

    American Thunder Caback for 99-04 Cobra

    My 03 Cobra sounds like a beast. It turns head when people hear me coming or leaving. I have Pypes O/R X pipe also which makes the tone even more deeper. The fitment of the catback was nearly perfect only took a couple of hour to install in my driveway.

    Bear Miller

    Year: 2003 Model: Cobra Driving Style: Daily Driver

    Helpful (0) (0)

Related Categories