well where is the down pipe in the system? would it exit where the cat would be normally? or are you super charged? you want flow but quite, then your gonna have to get rid of the boost maker(if its the roots style) that will take care of the makita drill noise, then id go with a 3 inch system with a long very densley packed ressinator and a turbo muffler. its like this,
take a pop can and cut a hole in the bottom and fashion a perferated tube about a 1/4-1/2 the outside diameter of the can, now lightly stuff some toliet paper in the can around the the inner tube, now scream through the tube, loud right? no prollem gettin yer voice through either, right? ok now triple the amount of toliet paper, and repete, much more quite huh? but still no prollem blowing trhough right? this is how you get different tones out the same system.
. But I'm not into noise (no offense to you Billy-Bob's out there who have pickups with straight pipes - although there's a special place in hell for you - right next to Harley riders with straight pipes 
). I guess the SVTF is tolerable (noise-wise), but I really would like to quiet the exhaust. Seriously. Any ideas? And by the way, I don't want to compromise performance - and keep in mind that this rascal is boosted.
wink wink.....bitches