A couple of moths ago i got an injen cold air intake... after a few days of driving i noticed a vibration and i thought something had gone terribly wrong.... i freaked out and started to try and figure out... i had no clue what it was... my steering wheel vibrated in park and in any gear but not in nuetral and i couldnt figure it out.. then it started to vibrate in neutral not in park... well anyways i took i to buddy of mine to listen and feel the car and he looked all dumbfounded and then finally we started to look at the intake............. and there it was.. the intake waws knocking against the edge of the hole right above the filter............... thios is just a heads up because unless you follow the intake all the way down around the piping you would never think that would happen but its because that dam hole is too small and if the intake gives way a little bit it will lean againt the nody and cause that vibrating feeling ......