I agree to disagree. In asking for the loudest drone free there has to be a system or muffler that is louder than another but quieter than one that's got bad drone. Perfect example seems to by my setup is horrible. But a corsa sport system is louder and little to no drone from what I'm seeing.

 

 

I run a 36" magnaflow, an ive never had any drone even when i had a 14" muffler. Although mine exits in the stock location. If you want to get rid of the rasp, put a 18" bullet before your muffler, and take the turn downs off.

 

I think I'm going to try the corsa db exhaust. And run a cutout. Should be the best of both worlds

 

I've installed the Corsa DB system on a 2012 Sierra Denali 6.2 liter. No drone whatsoever. Looks good and has an excellent fit.

BUT...... It is not loud at all. It has a good sound and a little growl too, but I had to roll the windows down to really hear the exhaust note at WOT.

Since you have catless LT's, it should be a good bit louder.

 

Who has the best pricing on the actual corsa sport syatem

 

Also am I going to see a power loss going to 3" exhaust. Factory on the 6.2 is 3.5"

 

Big body magna flow and a cutout. Cheap and awesome.

 

Nothing that you're going to notice while N/A. I see your sig has a blower cam listed. Are you planning FI down the road? Depending on your goals with FI, I probably would not go from the 3.5" to a 3" exhaust.

 

Yea we are putting on a whipple in a few weeks.