I just got my Nano air filter form Amsoil for my 24V 2002. It came with a foam pre filter attached. None of the fleetguards or Mopar filters ever had this. They do for my 07, but not the 02,,,, How am I supposed to clean it when it needs it????? You have to blow from the back or suck the debris out the front!!! Anybody else get this??? It fits just fine in the filter box!! Thanks!!