the cai is a bad idea in florida with all the rain, however the aem short ram is just fine seeing as it puts the filter at the same height as the stock one, and the stock box usually draws air from below the headlight. a stock box with a k&n, NO. I agree that K&N is a good filter, but in a stock box, that's like dropping in a fully built motor capable of low 10's and leaving the axles stock. The stock box is still going to be restrictive as hell, if you keep the stock box even with a K&N the header is useless, your not increasing the airflow to the motor enough to even worry about increasing the exhaust capabilities.