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New Dynomax Exhaust For 2009-2010 Silverado

Harvey Halabookie

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Harvey Halabookie Enthusiast

Harvey Halabookie

Posted
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Dynomax is offering a $75 rebate on their exhaust kits. They just came out with a new full stainless cat-back kit for 2009-2010 Silverados.

 

http://www.dynomax.com/application_info.ph...elded%20Muffler

 

I was planning on a JBA cat-back kit like I had on the last truck, but the Dynomax is about $60 less at Summit Racing, not including the rebate.

 

http://www.summitracing.com/search/?keyword=39495&dds=1

 

Has anyone installed one of these yet? I am seriously considering it, but I wonder about the sound and if there are any drone issues. I had Dynomax mufflers on my Chevelle and loved them, but they were loud....not something I would want to hear every day in my rig.

 

So should I spring for the Dynomax or just go with the JBA? I have not seen any sound clips of this kit posted yet.

shawnastleford Enthusiast

shawnastleford

Posted
Posted

I have the dyno max on my 09 4.8. I had to cut the flange off the exhaust because the exhaust i got was for a 2008. The only diff is where it connects right behind the Y-pipe. I have had it for almost a year now. I love it! It sounds similar to the magnaflow. It has a little drone in the city when accelerating. Cruse at 95 kph you can just hear a faint rumble. I payed $340 for mine Canadian. But it helps if you are a dynomax dealer lol. It retailed for around $900

Harvey Halabookie Enthusiast

Harvey Halabookie

Posted
  • Author
Posted
I have the dyno max on my 09 4.8. I had to cut the flange off the exhaust because the exhaust i got was for a 2008. The only diff is where it connects right behind the Y-pipe. I have had it for almost a year now. I love it! It sounds similar to the magnaflow. It has a little drone in the city when accelerating. Cruse at 95 kph you can just hear a faint rumble. I payed $340 for mine Canadian. But it helps if you are a dynomax dealer lol. It retailed for around $900

 

Thanks for the input. I was leaning toward the JBA, but I really can't go wrong for the price, plus the rebate. I will probably order it soon. I just wanted to make sure it didn't have the annoying drone at cruising speeds like the Flowmaster kit I first had on the last truck!

  • 4 weeks later...
Harvey Halabookie Enthusiast

Harvey Halabookie

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Bump:

 

I have had the Dynomax kit on my truck for two weeks now and I love it! It sounds great, not too loud, and the only "drone" I hear is during low speed (like 30MPH) steady driving right when the AFM kicks into V4 mode, but it really is not that bad if you have the radio on. I will try to figure out how to post a sound clip. This actually sounds more mellow than the JBA exhaust on my Yukon that had the 4.8.

 

The kit was very easy to install. Once I removed the factory exhaust, it took about 25 minutes to install in my driveway. This is part number 39495 for the 09-10 Silverado. It has the correct ball fitting that you can see right before the flexible coupling on the stock exhaust.

 

I really did not feel any difference in performance, but I do like the sound. I did however, gain about 1.5 MPG. Each month I make a two hour drive (90% highway) to visit the folks up in the mountains. I drive steady between 70-80MPH and always got about 17MPG on the DIC until I made it to the steep hills. By the time I would arrive, the DIC would show about 15.5 MPG average.

 

This past weekend I was shocked to see the DIC reading 17.5-17.8 average (before getting to the hills), and when I got to my parents' door, it was at 16.9! It must be making more power since I noticed that I was not leaning on the gas as much while going up the hills.

 

All in all I am extremely pleased with the quality and performance of the DynoMax kit. It was under $400 shipped, all stainless, and I just sent in the $75 rebate form.

 

I know everyone has their own opinions about what exhaust is best, but I'm recommending DynoMax if you're in the market for an exhaust kit.

uh6tdrvr Enthusiast

uh6tdrvr

Posted
Posted

Thats a pretty good gain im sure in both sound and mpg's. Im sure the gradual increase has something to do with computer taking time to relearn.

Julien Enthusiast

Julien

Posted
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I would be ordering that kit right now if only they offered it with dual exits, just a preference of mine. You cant beat their prices

Harvey Halabookie Enthusiast

Harvey Halabookie

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Does your system have that new VT muffler ( with the valve )?

 

That looks pretty cool.

No, it has the stainless steel welded Ultra-Flo. The VT does look cool though, but with the system I have there really is no reason for it since there is no bad drone.

Harvey Halabookie Enthusiast

Harvey Halabookie

Posted
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I would be ordering that kit right now if only they offered it with dual exits, just a preference of mine. You cant beat their prices

Yeah, I would have liked the dual exits too, but I could not go wrong for the price.

 

I think Tenneco/Walker, the makers of Dynomax, are in the process of expanding their line. My Dad called because he wanted a kit for his 07 NBS 2500. The only one they make has a stainless muffler, but the pipes are aluminized. The tech told him they are in the process of making full stainless kits for many more applications, with different exit location options. Though there was no timeframe given.

terzmo Enthusiast

terzmo

Posted
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I was ready to jump on it til I saw it was NOT dual exhaust....sort of like going hunting with no ammo..as far as I'm concerned. Good luck with it though.

BigBlueLB756 Senior Enthusiast

BigBlueLB756

Posted
Posted

It won't ship until Sept 9, so I'm in that "wait" mode, I guess.

 

Thanks to Harvey for the heads-up!

 

By the way, the August 2010 issue of "Truckin'" magazine reports, on page #34, a 23+ horsepower and 30 lb-ft torque increase with this system. Not bad, but we'll see. It's all related to the right foot on the gas.

BigBlueLB756 Senior Enthusiast

BigBlueLB756

Posted
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Got the confirmation number, and will be calling DynoMax later today to find out for sure.

Thanks, again.

Kblaze94 Enthusiast

Kblaze94

Posted
Posted

I'm looking at the links you have and they dont specify our trucks but as long as I get part # 39495 I'm good right? And do you still get a rebate from autopartsdealer, it's like $100 cheaper than summit and the dynomax flyer says no other promotions can go with it but didnt know if it was just cheaper. Harvey where did you end up buying yours from?

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