Originally Posted By: SuperDave456
Do the MOS2, skip the Reusable Air Filter.
+1 on both points.
Some years back on another Forester, I tried a K&N air filter. It was a royal PITA and I could see no benefit. If you put on too much oil, your MAF would turn to mush. Too little oil and the filter did no good. When I got ready to sell the vehicle, I left the K&N in place. The very first guy who looked at the vehicle immediately noticed the K&N air filter. He was really impressed! I think it sealed the deal, so it turned out to be a good thing after all.