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Flowmaster American Thunder Axle-Back Exhaust - Stainless Steel (05-10 GT, GT500)

9 Reviews
Our Price

$518.92

  • Item #18434
  • MPN# 817410

  • Market Price $576.99
  • You Save 10% ($58.07)
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Customer Photos
Features
  • Aggressive Flowmaster 60-series Delta Flow sound
  • Polished stainless steel 4" tips
  • 409 stainless steel construction
  • Includes two Flowmaster 60-series mufflers
  • Fits 05-10 GT and 07-10 Shelby GT500 Mustangs
Description


Flowmaster Sound. The Flowmaster American Thunder axle back exhaust system, with it's patented 60 Series Delta Flow chambered mufflers will improve your Mustangs exhaust flow for an increase in power and a throatier exhaust note.

Stainless Steel Construction. Constructed from durable 2.5" 16 gauge 409 stainless steel tubing for it's corrosion resistant properties the Flowmaster axle back features specialty 5" X 10" chambered 60 Series Delta Flow American Thunder mufflers with massive 4.0" diameter polished stainless steel tips for muscle car looks and sound. As an added bonus the tips are embossed with the "Flowmaster" logo for true custom styling.

Application. This Flowmaster American Thunder Stainless Steel Axle-Back exhaust system is designed to fit the 2005-2010 GT and the 2007-2010 Shelby GT500 Mustangs for both great looks and great sound.

Technical Note: Americanmuscle recommends adding the 2005+ Mustang 304 Stainless Steel Exhaust Hanger Kit from the drop down option above, to provide more strength, stability and a cleaner installed appearance. If you have a 2007 Mustang you may need the kit for correct installation.

Mustang Fitment: 2005 2006 2007 2008 2009 2010 Details

What's in the Box
  • (1) Right muffler assembly
  • (1) Left muffler assembly
  • (2) Clamps
  • (1) Nut
  • (1) Lock Washer
Installation Info
Tech Specs
Axleback Exhaust Specifications
Piping Material: 409 Stainless Steel Tip Material : Polished Stainless Steel
Piping Size: 2.5" Tip Size: 4.0"
Muffler Type: Chambered Fitment: 05-10 GT and 07-10 Shelby GT500 Mustangs
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10
  • GT500 - 07, 08, 09, 10

Most Helpful Reviews Read All Reviews

Overall Rating 4.8/5 Write a Review
5/5
Thank you for fast shipping

Nice sound easy to install , thank you American Muscle for the fast shipping.

Helpful (1) (0)

5/5
Got teh Flows

This review will be reflecting my mid-pipe nightmare - an *off-road Jegs H-pipe.* The story: We had SLP axle-backs and it was WAY too loud. I am surprised the dead didn't wake up. Had the stock mufflers

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Helpful (1) (0)

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Reviews (9) Write a Review

  • 5 Stars .89 89%
  • 4 Stars 0 0%
  • 3 Stars .11 11%
  • 2 Stars 0 0%
  • 1 Stars 0 0%
4.8

out of 5 stars

9 Customers Recommend this Product

Installation Time:Afternoon

Installation Cost:0-$100

  • Loudness / Volume: 4.222222 4.2/5
  • Exhaust Note: 4.777778 4.8/5
  • Fit & Finish: 4.444445 4.4/5
  • Bang For Your Buck: 4.666667 4.7/5
Filter By Sort By
  • 5/5 Yes, I recommend this product

    July 15, 2014

    Got teh Flows

    This review will be reflecting my mid-pipe nightmare - an *off-road Jegs H-pipe.* The story: We had SLP axle-backs and it was WAY too loud. I am surprised the dead didn't wake up. Had the stock mufflers put back on: even with an o/r H-pipe it sounded as if the engine was choking. Good but nothing Mustang worthy. Even with 303rwhp/319 rwtq 93 dyno tuned, maybe a mind game, they were a restriction. Did some research, apparently these Flowmasters are 3 chambered and produce a moderate sound. With stock cats they are reported as louder than stock and deep/bassy toned. With my o/r H.. . .Heck Yeah. Pure muscle from start, rev, accel, decel, and idol. Under normal driving it's completely streetable, when you mash it - yep, you will be noticed and heard from afar. LOUDER and DEEPER than SLPs with stock cats. Remember this is with an off-road H! I love it. Thank you AM and well made product from Flowmaster. Fit like a glove and the quality is top notch, the finish and tips are very sharp!

    DouglasQuaid

    Year: 2007 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Wilmington, DE, USA

    Helpful (1) (0)

  • 3/5 Yes, I recommend this product

    October 15, 2013

    Better than stock, just don't drop the hammer...

    I've been running these axle backs for a good year now on my 2008 Bullitt. These Flowmasters are definitely louder than the Bullitt's stock Ford Racing exhaust. Louder, but not obnoxious by any means. They sound good just daily driving 50mph and under, but I had to rate the exhaust note "average" instead of "good" because of how tinny they sound when you open it up. It basically sounds like air being forced through tin cans. I gave fit & finish a "fair" grade because of how difficult it was to get the driver's side muffler on, and the fact that the passenger side hanger had to be modified in order for the tip to look straight. If you're looking for something louder than stock but not obnoxious, these should suit your needs if you don't mind the drone and the tin can sound when you step on it. Otherwise, definitely look elsewhere. I am changing over to a set of Flowmaster Outlaws in hopes it improves sound, and here is what prompted me to do this: The other night I was driving with my girlfriend to dinner and a Subaru WRX with a potato cannon exhaust came up next to us. My girlfriend said to me, "That sounds just like your car." I could hardly enjoy my dinner.

    RickG

    Year: 2008 Model: Bullitt Driving Style: Street / Strip 'Stangs I have owned: 3

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    February 15, 2013

    Thank you for fast shipping

    Nice sound easy to install , thank you American Muscle for the fast shipping.

    alhmoudi

    Year: 2006 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Dubai - United Arab Emirates

    Helpful (1) (0)

  • 5/5 Yes, I recommend this product

    October 13, 2013

    Flowmaster American Thunder

    The exhaust fit was questionable, The finish is outstanding. My Pypes mid pipes had to be cut and re-welded in order for the Axle backs to fit properly. I believe the axle backs pipes were not bent correctly. Once it was corrected everything fits perfect.

    Top 250 Contributor

    LMitchell

    Year: 2006 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 3 Sumter SC

    Helpful (0) (2)

  • 5/5 Yes, I recommend this product

    December 23, 2014

    Flowmaster!!

    Great looking, great sound, no drone period. Tame when cruising, throaty when you run the rpms up. Easy install, no problems with the supplied hardware. Thanks AM!

    BlackedoutGTCS

    Year: 2007 Model: Other Driving Style: Daily Driver 'Stangs I have owned: 1 MN

    Helpful (0) (0)

  • 5/5 Yes, I recommend this product

    September 23, 2014

    Great product

    The order process and product arrival was exact. No problems with anything.

    TBlaque

    Year: 2009 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Lake Charles, LA, USA

    Helpful (0) (0)

  • 5/5 Yes, I recommend this product

    October 19, 2013

    Sounds awesome

    Easy to install sounds great recommended this product.

    Leblanc

    Year: 2010 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Dieppe New Brunswick

    Helpful (0) (0)

  • 5/5 Yes, I recommend this product

    July 10, 2013

    Nice

    Slight problem with left side install. Had to bend hangers a little. Louder at start up for sure...could be a little louder over all but then again more trouble:) Nice exhaust.

    wilbur

    Year: 2005 Model: GT Driving Style: Daily Driver 'Stangs I have owned: 1 Merton, WI, USA

    Helpful (0) (0)

  • 5/5 Yes, I recommend this product

    October 06, 2012

    Instant Smile! Electric with every rev!

    Finally a real muscle car exhaust! Do yourself a favor and get a quick recording of your stock exhaust to compare with Flowmaster :-) You will never get tired of that exhaust after installing. Visually the tips are massive next to stock GT. Great product!

    Top 250 Contributor

    Quorra1

    Year: 2007 Model: GT Driving Style: Show 'Stangs I have owned: 3 WA

    Helpful (0) (0)

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