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Dynomax Cat-Back Exhaust System Ultra-Flo Stainless System


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Cat-Back Exhaust System Ultra-Flo Stainless System
Oversize Fee:$19.99
Cat-Back Exhaust System
  • Ultra-Flo Stainless System
  • 1999-07 Silverado/Sierra 1500/2500 (2007 Classic only)
  • 4.3L/4.8L/5.3L
  • Extended Cab Short Bed (under 8600 GVWR)
  • Single Side Exit
  • 3" Polished Stainless Tip
  • Thank you! We will notify you when this product becomes available.


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    39311 is rated 4.9 out of 5 by 9.
    Rated 5 out of 5 by from Easy install and has nice deep sound Very easy bolt on install. Everything fit well and looks clean. Has a nice deep sound.
    Date published: 2019-12-07
    Rated 5 out of 5 by from great tone nice fit and finish everthing lined right up on my 2003 silverado ls extended cab short box you can feel the difference when you stand on it and is mellow with a nice tone at idle
    Date published: 2019-06-18
    Rated 5 out of 5 by from This is a great cat back for the $$. Fit great, easy to install, and sounds good.
    Date published: 2019-06-07
    Rated 5 out of 5 by from Awesome sound I bought this exhaust for my 2006 Silverado 5.3L and couldn't be happier. It sounds 10x better than stock exhaust! It's not straight pipe loud, maybe just 2 notches under that. Highly recommend this exhaust to anyone. Very easy to install
    Date published: 2019-04-02
    Rated 5 out of 5 by from Very Nice System Installed on '06 GMC crew cab. Yes it will fit on crew/short bed same as ext/std bed. Both are 143.5 wheelbase, which is the key. Directions don't spell out both config. This has a nice sound, aggressive but not too loud as others have said. That of course is subjective. Install was easy after getting the old rusty one off. This is 409 stainless for $318, very good deal compared to others. I did have a problem with the tip clamp so I just used a different one. It was too hard to get that band clamp tight exactly where I wanted it. If you like the tip sticking out more, you might not have any trouble. Only other thing is the intermediate pipe bends a little close to the drive shaft. It's fine but there's a ton of room there, they could have made it route farther away.
    Date published: 2018-11-15
    Rated 5 out of 5 by from Great exhaust I just put this on my 05 Silverado 5.3 extended cab and it looks and sounds great. Super easy install with no screwing around to get it to line up and fit right. Has a great idle sound and gets decently loud under load. I was also impressed with the quality of hardware it came with, the two clamps seem very durable. Would defiantly reccomend this exhaust.
    Date published: 2017-10-22
    Rated 5 out of 5 by from Very nice, high quality exhaust. I used this on my 2004 Silverado to replace a rusted single in dual out muffler shop exhaust the previous owner had installed. It is louder than I expected but no louder than the chambered muffler/system it replaced. it has a nice deep, mellow tone at idle but sounds pretty aggressive when you rev it. I have read other reviews about problems with the clamp for the tip but I think you just have watch how you position it. I wasn't sure if it was going to tighten enough to hold the tip in place until I repositioned the clamp and the tip so that it was compressing the back end of the clamp and it wasn't in the bend of the pipe. Once finished the tip and complete system is very solid, sounds nice and looks clean.
    Date published: 2017-10-18
    Rated 5 out of 5 by from Great Exhaust! 2002 Silverado 5.3 I bought this exhaust because it was stainless steel, and 300 dollars. Other brand names were much more money for just the regular aluminized systems. This exhaust has a nice deep tone to it and sounds great. It can be really loud when you want it to. I looked at all kinds of videos online for sound comparisons but honestly the only way to know for sure is to hear it in person. If your looking to get the most for your money this muffler is it. JEGS also got this to me in two days so that was nice as well. I put this on an 02 Silverado and it sounds great. If your on the bubble with this I'd say go for it. You will not be sorry!
    Date published: 2015-09-01
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