i believe the invidia tip is adjustable
as far as the hiss lou from amplified(whos shop works on Z's and G's) said that the hiss was common on the G37s as well so most likely it might be the engine
but i will have him check mine again maybe next week just to make sure its not anything else
im more relieve finding out the hiss is normal
but all i want right now is an actual fix on how to bolt the exhaust correctly so it doesnt sit on the crossmember
i hear it rattle everytime the car flexes
i dont get why the stillen reps wont just post a detailed step by step w/pics on how to install there product correctly