Just bought an AEM dryflow filter to replace my tired and clogged AEM original filter (think K&N copy)...it was bent out of shape due to the wire mesh covering the pleates being all bent. Bought it from Performance Improvements.
Moving along, this filter breathed new life into my intake. It flows smoother, and sure enough, no CEL. I'm hoping my CEL light was due to one of the sensors reading airflow incorrectly due to the low volume of air entering my filter. Crossing my fingers on that one. Gas mileage has improved quite a bit so far, especially for only 1 day of driving. I'm already getting 30 kms more out of a quarter tank than before and I haven't even hit the mark yet.
This is a worthwhile addition to your intake, if you can justify spending $90 on a filter.