the sound is like..hmmm i cant describe it... (2 metal spoons hitting each other x5, hahahhaha :D ) like some stuff is loose and its hitting something while i release the clutch.... its vibration is pretty fast and strong.... u can feel the car is shaking a bit... damn i just called them today.. and will go there tomorrow.. i might just leave it 1 week as well... what!? levin, you took it off!!! sigh~ all the way from Sydney and lasted only a couple of weeks?! it didnt actually vibrate my seat... its definitly behind me...... id better get this fixed before i go to some other place to change the tip