Cleaning K&N Filter...

My owners manual and several other sources, say you should not regularly clean the K & N airfilters. More than a little dirt build up is expected and the filter actually works better this way. If you're offroading in your Stang, you obviously want to clean the clumps out, but if it has just changed colors on you and shows normal dirt build up, don't worry about. My last one I went over 30k miles with and no a single issue. Someone correctlif I'm wrong though, these were the instructions I got for a K & N I had bought about 5 years ago. My new one for my current Mustang I never got the owners manual for, as it was intalled with my Supercharger.