here's some pics of a sierra denali 6.2 exhaust I opened up today.
I took this off a customers truck awhile back and wanted to see what is inside and how
well the stock parts might flow.
As you can see, the muffler has 3.5 inlet tube, 2 center 2" tubes and a 3.5 outlet tube, all perforated as well,
Looks like it would flow well.
The resonator from the tail pipe is interesting. It has no chambers and a spigot tube that I assume is to generate a noise cancelling sound freqency[like blowing across the top of a coke bottle] to help eliminate resonance/drone.

I got my 2010 vmax 6.2 today which has the same exhaust, I have arh 1 7/8 headers and cats to install.
Do we think the stock exhaust is going to flow enough.
I was going to remove the resonator as it is fugly, but the stock muffler may drone without it

 

nice headers... get a corsa sport, you'll love how it sounds... make sure you put installed pics up of the headers

 

I have always liked[and sell] magnaflow but they don't make a direct fit yet for 6.2.
IF I went with corsa I think I would go with the touring system. I know those headers/cats
would be too loud for me with a sport kit.

You find a truck yet??

 

I have long tubes and corsa sport on my SS and I honestly don't think its that loud, IMO. I considered electric cutouts. I found one just haven't had the time to go look at it yet. I'm working 6 days (65-70 hrs a week) the next 3-4 months so its tough.

 

I hear ya on the exhaust but as you know, it's subjective. I put a resonator in front of the muffler on my 08 to tone it down a bit.

Tough to work so much, try and get down to drive one of these trucks, you are going to like it

 

Yeah I'm hoping by the end of the month or beginning of next month to get out there

 

I wish you would not have shown us those pictures! I don't see performance in that exhaust. When I put the headers on my truck, I put a back pressure gauge on it and took it for a drive. At WOT and 5,000 rpm, it had less than 1 lb of back pressure which told me the stock exhaust was flowing plenty good for a daily driver. Keep posting pictures and info as you upgrade your new truck.

 

thanks for sharing,,u think it would help if i eliminated the resonator on my denali?

 

Just sound, I don't see it changing anything with the pressure...

 

hey do u know of a direct fit muffler that would take the stock mufflers place?