Check out this page, use "air" as the search term. Lots of air inlet ducts and hose, any hose that's not ribbed on the inside should be fine. I was going to place a dual 3" inlet on the driver side of the lower grille, next to the radiator. One hose to the driver side brake and the other directly into the stock airbox. I was going to use a single inlet on the passenger side to run to the brake. Problem is there is a big metal bracket gusset thingy between the front piece of the unibody and the piece on each side of the car, it is above the black plastic air deflector piece which sits just behind the bumper on the underside of the car. If it is just a tow point and not structural, it's getting yanked, as it would be a useless tow point anyway. Otherwise ther is no room to run ducting. Anyone know why it's there?
