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Flowmaster Exhaust Systems Part #817523 Customer Reviews

Average Rating

13 Customer Reviews

Music to my ear

Reviewed by sean S (BRADLEY, IL) Reviewed for a 2012 Chevy Silverado — Monday at 11:44 PM

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Awesome kick ass sound great balnce

Outstanding Exhaust System

Reviewed by Pete S (Taylorville, IL) Reviewed for a 2011 GMC Sierra — Apr 26, 2017 9:53 AM

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I installed this system on my 2011 GMC Sierra and it is fantastic. I have noticed an increase in fuel economy along with that signature Flowmaster performance.

good sound

Reviewed by Curt P (HANNA CITY, IL) Reviewed for a 2012 Chevy Silverado — Sep 07, 2016 3:40 PM

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everything was good except for the bolt for the exhaust tip, replaced it with a bigger bolt

Great Exhaust

Reviewed by dan l (RESTON, VA) Reviewed for a 2010 Chevy Silverado — Dec 23, 2014 5:24 AM

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I purchased the Flowmaster Force II cat back exhaust system on 12/5/14. I had a shop install it on my 2010 Silverado about 1 week later. The install was smooth and the sound is great. One of the bolts was bent and stripped and AA has stated that it was sent out twice, though I have never received it. That is a small issue. In the less than 2 months since the Flowmaster was installed, it has become very rusty (pipes, spots on muffler, hangers). It looks much much worse than the stock system that it replaced that was 4 years old. After several calls to Flowmaster and AutoAnything, it appears that I have no recourse. AA customer service has been polite but not able to help. One individual from Flowmaster tech support was very dismissive, short and was not interested in seeing pictures or even discussing the issue. I then spoke to a supervisor that was willing to listen after I cooled down and called back. He told me that I should/should have painted the product with some high temp paint and that the Force II would develop surface rust. He went on that if it were to ever rust out then the warranty would cover it. The warranty covers defects in product, not replacement labor costs. I understand the different grades of stainless steel (304 vs 409) and that the 409 that Flowmaster uses will show some surface rust that, per Flowmaster, will not rust thru all the way. However, if I knew that it would look this bad in less than 60 days then I would not have bought it, rather I would have spent a few hundred (or less) more and bought a Borla type product that uses 409 stainless. In summary, Force II sounds great, looks rusty horrible after less than two months. I live in Virgina and so yes, they do use some salt on the roads, but it has not been that bad o far this year and the truck is also not my daily driver. Spend some extra money and get a better product and know going in that your exhaust system will be covered with rust very quickly. I would rate the product a 2 star now after 2

Flowmaster Exhaust System

Reviewed by Alexander E (DEXTER, MI) Reviewed for a 2011 GMC Sierra — Apr 01, 2014 4:02 AM

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2 of 2 people found the following review helpful.

Great product. I bought the super 44 series muffler to install with the exhaust system instead of the super 50 series muffler it came with. Best sounding exhaust I have heard in my truck in a while


Reviewed by Kelly W (Timberville, VA) Reviewed for a 2009 GMC Sierra — Mar 07, 2014 11:51 AM

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Great product and great price. Improved the factory exhaust tone.

Close to stock

Reviewed by Jeremy Z (RICHMOND, TX) Reviewed for a 2007 Chevy Silverado — Feb 27, 2014 2:23 PM

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1 of 1 people found the following review helpful.

Sounds good but not too loud

Great value.

Reviewed by Eric S (HILLIARD, OH) Reviewed for a 2012 GMC Sierra — Jan 21, 2014 6:46 AM

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Couldn't be happier with my purchase. Installation was extremely easy and the performance is very noticeable. Sound is just where I want it- great tone when you get on it and barely noticeable at cruising speed.

Flowmaster Exhaust

Reviewed by William M (Saint Germain, WI) Reviewed for a 2012 Chevy Silverado — Aug 13, 2013 6:52 AM

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3 of 4 people found the following review helpful.

System install very easy. Took about 3 hours, everything fit good. System is a little louder then I would like but I can live with it. Gas mph seems a little better. Over all a good product. Would recommend to anyone.


Reviewed by CRAIG D (kansas city, MO) Reviewed for a 2016 GMC Sierra — Mar 05, 2013 7:15 AM

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1 of 1 people found the following review helpful.

Great sound, was a little more than I wanted to spend, waited until I got a coupon to purchase. Would have been really easy to install if truck was on a lift. Having install it on the ground was a little more difficult. Still a great system

Flowmaster Exhaust Systems - 817523

Cat Back Exhaust - Force II Series
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  • Style:
    Single Side Exit (409 Stainless)
  • Part #:
  • 3" Pipe
  • Super 50 Series Single Inlet, Single Outlet Muffler
  • 3" inlet, 3" outlet
  • Lifetime Limited Warranty
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