I'm starting to get more and more lifter rattle during light load situations (nothing at idle, nothing at WOT). I tried the seafoam thinking it might be carbon build-up causing a knock that would cause the knock sensor to retard the engine and screw up the timing enough to cause the lifters to rattle, but that definitly wasn't it. Also just installed an Injen CAI about the same time it started. I have 96k on my '03 (I know, I probably have the most on an '03 on the org) so I'm probably seeing this before anyone else. Any suggestions?

Also, I'm not sure it's the lifters as I can't get it to happen when the car is stopped. Could be the valves.