I dove my friend's Z4MC with RPI for 30 minutes and I gave me a headache
so I dont know how you guys could deal with day in day out. I have Supersprint Race and X-pipe. The setup is loud enough for me (at WOT). I also lined the trunk with Dynamat Extreme and it seems to help but mostly reduce vibration and dampening inside noise. It wont block exhaust noise.......