Just installed Test pipes + Y pipe + catback PRO-1 70mm and I love how it looks like stock and how it sounds untill 3K rpms , After 3k rpms it starts making farting exhaust internal rattle noise like honda do . when WOT , it sounds awesome ! I have my on little shop where I do Fix Nissans/infinitis and I have all the equipment to weld muffler or resinator but I dont want to guess I like to get advice what resonator or muffle to weld
2nd it started hissing when Decelerating
you will hear from 11sec to 15 sec
2012 G37S dyno - YouTube