How difficult is it to install the JLP CAI kit? Is there a difference between the forced air kit and the ram air kit? Why on the JLP website does it say that the forced air CAI kit is for off-road use only? Sorry if the questions are stupid but I need to buy a CAI and still trying to decide which one to get. Doesn't seem to be much support for L's out here in San Diego. You guys are my only hope