12. Next on the agenda was to change out the air filter for an aftermarket drop in filter from aFe. After unbolting the filter lid with a T-25 Torx bit, the old filter was removed. The aFe drop in filter is much less restrictive than the filter that was in the truck. Also, the aFe filter can be cleaned one of three ways: blowing it out with an air compressor, sucking the dirt out with a vacuum, and washing the filter in water. The filter simply dropped in and the lid was tightened down.