I'm new to the board, but am finally back in a Dodge after a long period in the wilderness ('97 Saturn! yuck!) I owned a '51 M-37 for several years (daily driver!) and a '93 Dodge Cummins (2WD...got stuck in tall grass.) Now I have a '93 318 4X4 and am hearing a lot about K&N air filters. Which one should I get? I have more questions, but that's it for now. Thanks in advance.