Ill try my best, give me some time.
But yeah the most drone you get is when you rev it between 2000 and 3000 rpm. When crusing on the freeway its virtually silent, basically like the stock exhaust... this was my worry before I got the exhaust as I didnt want it to drone when cruising at 100 KM/h... no problem at all...
And you get used to the drone after a while at slow speeds, infact Im enjoying it now.. and my GF doesnt mind it at all, says it sounds "tough."