I bought AFE DCI when it first came out because it looked cool. Performance actually degraded. On a whim I decided to put it on this past Friday with the same results. Put the OEM back on Saturday.
FWIW, after a hard run, if you take the top off the oem box, the air filter is relatively cool. Not so with the AFE. Those suckers are H-O-T and take their sweet time to cool down.
Hard to beat the OEM air box.
What do I know? I'm insane.