I put mine through the cowl using a ford windstar filter housing, ford also uses the same housing on some explorers I believe. Anyway, I'm happy with it, don't know that I gained even 1 horsepower though. Raises intake up a few inches. My reason was to open up the passenger side fenderwell to allow me to mount a OBA compressor someday. Plan on adding a cowl scoop facing the windshield someday, for more protection from water. Have had a couple of crossings send a wave of water up over the hood, think the rear facing cowl scoop will help keep that out of cowl area some.