Originally Posted by imola4.8isWA

i got my stock resonator removed on my 4.8 after doing that, my X5 sounded like a Mustang it had the beefiest but most rattleist sound ever, sounded good but the rattle got to me. So i decided to purchase an X pipe and after doing that, and installing it, the rasp almost basically dissapeared, i still have it a little, but it sounds perfect now i think.

So it depends to your personal preference and how u think ur X5 should sound..