Based on the dyno runs that Engineering Explained did I would say that the K&N does give 4-5 hp/tq. I am switching to the dual CAI as soon as they are shipped, but I figured cheap HP is cheap HP. If the concern is applying the oil again is problematic then I suggest just buying a new one each time depending on your driving habits. I don't drive much so one would last me a long time, but that can get quite expensive if you drive frequently.
