It's got a real low rumble at idle, no tin what-so-ever, then a mean growl at off idle driving, and a low howling "wwwhhhhaaaaa" at wide open throttle.
I am full 3" from the turbo back and no cats (LIPP Elbow, RT DP, test pipe, Greddy SP), when I ran with a stock elbow and HKS DP with stock...