Are you guys seriously thinking that a drop in filter will add any noticeable power???
A drop in filter isn't increasing the amount of air sucked into the intake enough to actually help the performance of the engine. IMO K&Ns are just a waste of money I mean sure they last "forever" but you still have to clean and oil them. I'd much rather just pay the $50 for a brand new filter every 10k miles or so..
If you really want to add performance through an intake system just get a CAI or SRI even then I doubt those will add much a noticeable difference alone. Full bolt ons and a tune would be the only real way to get a nice performance increase that would be noticeable.