I installed a Conical K&N that I cleaned and sprayed with the K&N oil. Also have the upgraded metal tube that holds the MAF for the lack of a better word. I've noticed that whenever you get over 3000rpms there is a whining sound that sounds like a vacuum leak. I checked all connections and they are tight and snug. Is this because of the shape and design of the filter? Or because i'm getting a leak somewhere?