I'm not from this board, but I'd be weary of the K&N.. It does allow more air flow, but the K&N usually doesn't filter as well.. Just check out the box, nowhere on it does it actualy say it filters better, or even as good as a stock filter. In fact they go on to say that the K&N filters better as it gets dirty which is becasue the K&N's holes are too big and if you clog up some of them it actually filters better. If you take your K&N and hold it up to the light you can actually see throught the small holes.. and yes, the dust is smaller than these holes...

I've had a stock filter, I've had a K&N but found traces of dust behind the filter in the air box.. and now I use an amsoil foam air filter which seems to be the best of all... If something better comes out I'll use that, but there is no way in heck I'm ever gonna use my K&n again!!
-Chris