A little behind in the conversation... Does the 4" drone at all?

I put a stock Duramax catback on and surprisingly, it doesn't drone at all...and its dumped after the axle. I'm just not fully happy with the sound. I like the quiet, but there's some rasp in it.

 

theres a teeny tiny bit of rasp in the upper-mid RPM range, but its barely noticeable. the 4" does drone some even with it ran all the way out the back. but it sounds too badass to mess with I've been asked countless times how I got a BBC in the truck LOL... VERY deep and throaty and absoltely screams in boost or at WOT...

a few guys have heard it in person and from in the truck, they can give a little more unbiased report on it.... lets just say that STS kits arent the only way to hear the turbo