I like quiet if I could have 700rwhp & it sound like a sewing machine, I'd pay, big time, I like that surprise attack & unexpected look on peoples face, when they're like "what the h*ll was that"... We've made 485rwhp on an automatic 05 at 14lbs I think its pushing its limits, but it is holding up very well. Its stock except for mid/catback & gt500 fuel system.