Anybody have any experience with their invidia exhaust (or maybe any cat back) making a buzzing sound from below the center console at around 2800 rpm. It sounds like a metal on metal contact. Possibly the resonators hitting a heatshield?

 

you are experiencing rasp.

 

Nope, cause I had to take off the y pipes to get a melted plastic bag off, and when I put it all back together, the buzzing/rasp is gone. Unless something else changed. I had no issues with any rasp for over a year, and then the noise started. Normally any rasp starts from day 1.