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Flowmaster Exhaust Systems Part #817749 Customer Reviews

Average Rating

5 Customer Reviews

love it

Reviewed by Brett M (Sparta, TN) Reviewed for a 2017 Ford Mustang — Mar 15, 2017 7:52 PM

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very easy to install took about 1 hour from start to finish sound is awesome would definitely recommend this product. thanks staff for helping me pick the right system.

louder than expected

Reviewed by clay r (winchester, VA) Reviewed for a 2015 Ford Mustang — Oct 06, 2016 1:39 PM

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but i like it for the most part. it has a horrible drone in sixth gear at 1500 rpm. 2000 rpm cruising at highway speed is ok. it idles quietly and when i punch it it's not all that loud. i like the way it purrs when i'm revving through the gears and it cackles when i shift. nice boost in power as well. no it lights up the tires when i punch it in second. all in all great fun


Reviewed by Tristan H (Auburn, WA) Reviewed for a 2016 Ford Mustang — Apr 17, 2016 8:13 PM

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Great system

Louder than I expected

Reviewed by Mark E (Fairfax, VA) Reviewed for a 2015 Ford Mustang — Jan 18, 2016 4:57 PM

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I bought the updated model (introduced 8/15) which instead of being an S type muffler the new one is more of a turbo type and it is very loud especially at start up. Once on the road though the sound is not overbearing but when you get your foot into it...well I did say it was loud.

Perfect Balance - 1 Happy Camper

Reviewed by Richard S (Cocoa, FL) Reviewed for a 2015 Ford Mustang — Jan 09, 2016 11:41 AM

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Started with Pypes Pype-Bomb Axle-Back exhaust (muffler delete) on the wife's 2015 Mustang GT-automatic. Sounded great to me- with little or no drone- but waaaaay to much volume for her. Went with the Flowmaster American Thunder Axle-Back and found the perfect balance between stock and muffler delete. Just the right tone, muscle-car sound at acceleration, quiet at cruising speed. Had local auto repair shop install, took less than 1 hour. Delivery was prompt, package well secured, fitment good.

Flowmaster Exhaust Systems - 817749

Axle Back Exhaust - American Thunder Series
  • $621.68
  • Free Shipping
  • Ships Between 6/28 - 7/02
  • What Do You Drive?


  • Style:
    Dual Rear Exit (409 Stainless)
  • Material:
    With Dual Exhaust Tips
  • Part #:

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