Sure a cam will get you a bit more power but the reason we all love 22r/e's is baecause they are so indestructible and a cam will take away from that. Remember its a 4 banger so power will never truly be had without a ridiculous amount of money. And please don't get a K&N, they let so much crap into your engine you don't wanna know. If you can find a foam style air cleaner that would be the best of both worlds in a sense (airflow and filtration).
Headers never hurt anyone though
