I have spacers on the fronts of my car.. mainly used for my 19's so I didn't rub the inner tire on the fender lining when i turned the wheel. and they won't create any more vibration if you get a good set, and you gauge them for flatness.. they are worth it if you want to do the job right...
FOUNDER of the BMW-Forums Michigan Club
<span style='color:green'><a href='http://www.cardomain.com/memberpage/458339' target='_blank'> Car Domain UNFINISHED </a> </span>
<img src='http://www.bmw-forums.com/forum/uploads/post-4-1078289877.jpg' border='0' alt='user posted image' />