There is a small PCV? hose that was attached to the original airbox, and the Airaid instructions said to put this little filter that was included, through a little hole on the airdam, then hook up the hose to it. But there was no "hole" to put in it, so I just put the filter on the hose anyway.

So when I took a drive after it was all hooked up, I get a whistling sound at about 2300-2500 rpm while driving.

Anyone else have this problem, and if so, what did you do? Thanks.