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Flowmaster Exhaust Systems Part #817428 Customer Reviews

Average Rating

15 Customer Reviews

installation review

Reviewed by David B (Bonita Springs, FL) Reviewed for a 2007 Chevy Silverado — Dec 15, 2016 6:28 AM

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While I did not personally install the system I spoke with the mechanic who did the work and he said the system went together OK with the exception that he could not tighten the chrome tail pieces enough where he felt they would not eventually fall off so he welded them which was OK with me. The system looks good and sounds terrific.

2005 GMC Sierra 5.3L

Reviewed by Jeffrey G (Greeneville, TN) Reviewed for a 1973 Chevy Corvette — Aug 24, 2016 4:31 AM

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Nice system, really nice system, from the manifold flanges all the way through the exhaust tips. Good quality, sound, and performance enhancement.

American Thunder is right!

Reviewed by William E (LEXINGTON, SC) Reviewed for a 2001 Chevy Silverado — May 12, 2015 3:37 AM

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I was looking for an exhaust system to breathe life into my 4.8L V8. My stock exhaust was doing it's job perfectly; my truck was virtually silent - not what I wanted my truck to sounds like. This exhaust provides a nice deep tone at mid RPM's and a low throaty note at idle - even on my relatively small displacement engine. Installation wasn't as easy as some reviewers had proclaimed, but it wasn't terribly difficult either. I don't have a lift and didn't even bother to raise my truck.

Wouldn't buy again...

Reviewed by Don S (Brookings, OR) Reviewed for a 2000 Chevy Silverado — Mar 14, 2015 10:40 AM

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Thad Cat pipe wasn't bent correctly it rubbed on the cross member, and the driver side pipe comes in over the read end and you can't mount your Spare tire back. I'm having another pipe made to go around the shock so I can get my spare back in its place. Not a real happy customer . My Trk is a 2000 Chevy Silverado with a 6" lift

Great sound

Reviewed by Shayne R (SWANTON, OH) Reviewed for a 2004 GMC Sierra — Jan 28, 2015 9:11 AM

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I love the looks of this on my 04 GMC Sierra. Sounds great as well. Mostly easy to install minus shearing off the studs from the stock mounting point. Although flow masters kit pre planned that as they supplied new bolts for that reason.

Dual flowmaster 40 series exhaust Stainles Steel

Reviewed by Jeff H (TROY, MO) — Oct 01, 2013 9:15 AM

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Stainless Steel is the way to go. Looks great! Sounds great! Mild drone in cab at 1800 rpms but if your looking for performance sound this is it.

Not that loud

Reviewed by Jaxon V (ABILENE, TX) Reviewed for a 2003 Chevy Silverado — May 16, 2013 1:57 PM

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2 of 3 people found the following review helpful.

Pretty good, but its not really that great, pipes didn't want to fit together properly and it wasn't crazy loud like I thought it would be.. looks great though


Reviewed by troy W (MATTOON, IL) — Apr 26, 2013 10:02 PM

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Order stainless system and they send aluminum steel muffler which makes no sense make it all stainless!!! Overall good sound no gas mpg increase

2000 Chevy silverado

Reviewed by Ross L (Jasper, IN) Reviewed for a 2000 Chevy Silverado — Dec 10, 2012 10:25 AM

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2 of 3 people found the following review helpful.

Sounds great!!! Can also tell a difference in power. Great exhaust!

Pipe Bends

Reviewed by Patrick M (INDIALANTIC, FL) Reviewed for a 2003 Chevy Silverado — Nov 16, 2012 1:16 PM

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2 of 2 people found the following review helpful.

Front pipe or 3rd pipe, possibly both, were on the edge of tolerance. Bends seemed to be off a little causing right pipe to keep shifting into right rear shock. Think we finially got minimum clearance but difficult event.

Flowmaster Exhaust Systems - 817428

Cat Back Exhaust - American Thunder Series
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  • Style:
    Dual rear/dual side exit (409 Stainless)
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