i dont know anything about K&N, so i cant comment, but ya guys w/ K&N would give a holla, dat be cool.
INJEN RD2501P is 2 in 1 intake system. with this set up, you can run at as CAI, or short ram. CAI, works wonders on hwy, and top end.
short ram for quick off the line/start.
you can switch to CAI or shorty in about 15min. with minimal tools. socket wrench.
i've had my INJEN 2yrs. with no prob. and they're CARB legal too.