New Question-----\"high flow\" air filter for a 6.2L? I work at a Chevy Dealership in the parts department. While helping to go over a lot of the OLD parts we have (generators anyone?/forums/images/icons/tongue.gif) I came across an AC Delco air filter for the 6.2L trucks and the older 350 Olds Diesel cars. Part number is A644C, box says it's a replacement for the FRAM CA3492. Anyways, the thing is a regular paper air filter, but it has this foam prefilter around it. It's still in the plastic bag, so I know it's supposed to be like this. Were they all like this? Is this something special? I'm just curious. I figure I'll just set it aside and throw it in when I get my diesel K5 in a month or so. Save up for a better filter then.