I'm running 36" straight fishtails with 20" extensions and 10" samson baffles (have I mentioned this before?). We have a decimeter at work so I jacked around with it for a bot. The meter was 1' back and 2' up from the exits. At idle they are 80db. racking the rpm up to 6k and back down (kinda a vroom-vroom, not a steady hold at 6k) made 122db.
They were even louder before the baffles. I'm looking for some of the khromewerks HP Plus baffles if any one has some...