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Flowmaster Exhaust Systems Part #817663 Customer Reviews

Average Rating

5 Customer Reviews

Exhaust clamps

Reviewed by Jim H (MILFORD, CT) — Apr 21, 2016 5:16 AM

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Clamps don't tighten down put to much pressure on them and bolts snap had to purchase other clamps added cost approximately 80.00

American muscle

Reviewed by Travis T (Tomahawk, WI) Reviewed for a 2003 Ford F-150 — Jan 31, 2016 3:36 PM

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The truck has a awesome sound you romp on the gas or when you put the truck on cruise. The truck has a perfect rumble and stead sound when you put the truck on cruise. When put the gad pedal down the has a perfect roar.


Reviewed by Scott P (Leominster, MA) Reviewed for a 2003 Ford F-150 — Oct 27, 2015 4:44 PM

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Exhaust sounds amazing! truck has a nice rumble to it now

best sound ever

Reviewed by Robert W (ALEXANDRIA, VA) Reviewed for a 2000 Ford F-150 — Oct 24, 2014 4:36 AM

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the flowmaster exhaust system was easy to install it went on in about a hour. I like the rich sound my truck has now and more power.

Easy installation; looks great; sounds great; improves ave. mpg

Reviewed by Dylon E (North Augusta, SC) Reviewed for a 2001 Ford F-150 — Feb 21, 2014 9:30 AM

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5 of 5 people found the following review helpful.

Installing the Flowmasters was easy -- the hard part was getting my old exhaust off. I found a video by AutoAnything on installing these on a similarly-modeled truck, and watched it several times to get the gist of what to do. I have a system for monitoring the vitals in my truck, and one of its functions is fuel economy: since installing the dual exhausts, I've been getting between 2 and 7 more mpg's on average, depending on where and when I drive. It doesn't hurt that they also sound amazing.

Flowmaster Exhaust Systems - 817663

Cat Back Exhaust - American Thunder Series
  • $255.97 - $1,557.97
  • Free Shipping
  • Ships By 8/17
  • What Do You Drive?


  • Style:
    Dual rear/dual side exit (409 Stainless)
  • Part #:
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