okay,.... I just got talked into changing the whole exhaust... from headers back... took it to my guy at budget and he custom did it from headers back into one high flow Cat. then straight to the flowmaster force II kit... now, the prob. is>>> at high RPM there is a really scary rattle sound!!! sounds like sh*t!!! so what is it?? a few sugg.......maybe thinkin' that a clamp isn't tight enough?