The hose goes to the actual rubber intake track at the airbox, it does not go to the filter. It goes to the 4inch rubber piping that connects the airbox to the turbo. It is not soaked with oil, just a tab moist. I am going to check my airfilter today and entertain the possibility that a clogged airfilter is causing the engine to draw air from the path of least resistance, ie the little tube from the valve cover.