Ok i am running the 1/4 at our track next weekend and wanted some extra power so i decided to make a inexpensive cold air intake. i used this dryer vent type pipe which the only thing about it i didn't like is the inside is a bit rigid, but not much. So we set it up exactly like cold air intake would be, its 3 inch jsut like an aem or anything else and i ran it from the manifold, down to into the vender like where a CAI would be and its great, it sounds good when at WOT, and i feel the power difference, even my friend felt it, when i gunned it on some nice ashpalt and it hit vtec, it made a huge different, vtec felt so powerful. I defenatly recomend it to everyone, and it costed 10 bucks cuz i had a filter for free from last year on there...