Open wastegate turbo is loud...when you want to startle straight pipe harley guys who suffer from hearing loss drop it into 3rd on the freeway and goose it. I also enjoy scaring the crap out of pedestrians, small dogs, bicyclists, old ladies, pretty much anything within earshot when I get on it...when I drive it like a civilized human though it's quiet...not so quiet that you can't hear it but quiet enough that po-po aint hunting me down.
Old vid of my car when John visited AZ to play with my setup, but it's pretty indicative of cabin noise...being outside is about 10x louder
[ame="http://www.youtube.com/watch?v=D_cKbnykMNk"]Quick blast in the P&L STG1 Turbo Kit - EcuTek Tuned - YouTube[/ame]