Powair vents are excellent universal vents! Their main purpose is for snowmobile air boxes, so when your intake gets clogged in deep snow, your engine can still breath. We have found these vents great for many applications for snow and offroad. Simply remove the rubber flap from the inside of the vent and you have an excellent flowing 2 way vent. 2" hole saw is required for the 2" vent, and a 3" hole saw is required for the 3" vent.