I have been thinking of going cat-back on my 3.0. I wanna go with a similar setup to Casper's, but no headers. 2.5" piping to the apexi N1, 90mm tip. Does anyone know if Casper changed his Cat, or what he did with resonation? I have heard his is VERY loud, i dont want to be obnoxious, but i want my presence to be felt. I was thinking of eliminating the resonator and going straight to the N1, will that be too loud? Sorry for so much, help me out people!