Review on 🔍 K&N Engine Air Filter: High Performance, Premium, Washable, Replacement Filter for 1997-2011 Ford/Mercury/Mazda (Ranger, Explorer, Mountaineer, B2300, B3000, B4000) - Product Number 33-2106-1 by Aries Greene

My truck seems to like the filter. The MPG went up a bit and that might have added a few horsepower. The noise has changed to a deeper tone when accelerating, which also tells me there's a little more air moving in it. Thoroughly clean the airbox when installing, do not skip installing the airbox gasket (it helps seal the box). Another tip: leave the filter in the sun for a while before installing it. K&N ships them filled with plenty of oil that can coat the MAF sensor diodes. I left it in the sun and then lightly pressed a towel against both sides. Just a precaution I'm taking. Enjoy!