Guaranteed Free Delivery by 12/24! available on most items - Details

Talk to a Mustang Expert
Every day 8:30AM EST - 11:00PM EST
Win $3,000 In Mods!! Enter Daily!

Flowmaster Force II Axle-Back Exhaust - Stainless Steel (05-10 GT, GT500)

Market Price $640.99 You Save 12% ($74.01)
Our Price


FREE Shipping

  • Item 18434
  • MPN# 817410

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Aggressive Flowmaster 60-Series Delta Flow Sound
    • Polished Stainless Steel 4" Tips
    • 409 Stainless Steel Construction
    • Includes Two Flowmaster 60-Series Mufflers
    • Fits 2005-2010 GT and Shelby GT500 Mustangs
    Flowmaster Sound. The Flowmaster Force II Axle-Back Exhaust System, with it's patented 60 Series Delta Flow chambered mufflers will improve your 2005-2010 GT or 2007-2010 Shelby GT500 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 stainless steel Flowmaster Force II 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.

    Fitment: 2005 2006 2007 2008 2009 2010 Details

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Right muffler assembly
    • (1) Left muffler assembly
    • (2) Clamps
    • (1) Nut
    • (1) Lock Washer
    Installation Info
    Tech Specs
    Axle-Back 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?

    You Might Also Like

    Customer Photos (3) Submit Your Photo

    View All 3 Photos

    More Products You Might Like

    Q & A

    No questions about this product yet.

    Ask the First Question

    Customer Reviews (12) Write a Review

    Overall Rating 4.7

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:$100-$250

    • Loudness / Volume 4 4
    • Exhaust Note 4.818182 4.8
    • Fit & Finish 4.454545 4.5
    • Bang For Your Buck 4.727273 4.7

    • 5/5

      Installation Time: Less than 1 Hour

      January 23, 2018

      OUTSTANDING Exhaust Notes

      If you love the muscle car sound, these will be music to your ears! Great tone and not overly loud, just respectful. I replaced my Ford Racing axle back exhaust with these and am much happier with the tone and lack of resonance inside the car, esp at highway speeds and in certain RPM ranges. This is the exhaust for 05-09 Mustang GTs! My mustang: JBL Long Tube Headers, X pipe, Bama Tune, Cold Air Intake, 3.71 Rear End, Wilwood Brakes.


      Year: 2005 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      November 06, 2017

      16 Again

      Ok, maybe not 16 again but I am nearing 60, and I can say the Force II sounds awesome! It is much louder than stock but with a nice deep throaty rumble. I'm not sure if my wife is messing with me but she hasn't said anything about it...I think she knows and secretly loves it. Our 08 GT vert is more a weekend driver, but I cant wait for the weekend to fire it up. Had to take to my muffler shop and they did a nice install. A little drone in some low rpm's but I hear that may go away after break in. Unless you want deafing loud this may be the perfect exhaust...was between Force II and Borla Touring, so far very happy with Force II purchase!


      Year: 2008 Submodel: GT

      Helpful (4)

    • 3/5

      August 17, 2016

      American Thunder

      the jury is still out the mufflers were installed on Monday 8/15/2016 by professional muffler shop the mufflers sound good at times but occasionally the mufflers spit out a high pitched whining sound


      Year: 2007 Submodel: GT

      Helpful (5)

    • 5/5

      Installation Time: Less than 1 Hour

      December 23, 2014


      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!


      Year: 2007 Submodel: Other MN

      Helpful (5)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 23, 2014

      Great product

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


      Year: 2009 Submodel: GT Lake Charles, LA, USA

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      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!


      Year: 2007 Submodel: GT Wilmington, DE, USA

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      October 19, 2013

      Sounds awesome

      Easy to install sounds great recommended this product.


      Year: 2010 Submodel: GT Dieppe New Brunswick

      Helpful (5)

    • 3/5

      Installation Time: Less than 1 Hour

      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.


      Year: 2008 Submodel: Bullitt

      Helpful (6)

    • 5/5

      Installation Time: Afternoon

      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.


      Year: 2006 Submodel: GT Sumter SC

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      July 10, 2013


      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.


      Year: 2005 Submodel: GT Merton, WI, USA

      Helpful (6)

    • 5/5

      Installation Time: Less than 1 Hour

      February 15, 2013

      Thank you for fast shipping

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


      Year: 2006 Submodel: GT Dubai - United Arab Emirates

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      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!


      Year: 2007 Submodel: GT WA

      Helpful (4)

    Related Mustang Categories