filters actually 25 bucks at autozone. around 60 for o.e.m from dealer.
http://www.318ti.org/forum/showthread.php?t=8067 if i were you id go ahead and grab 2 3 inch fuel hose's and 4 hose clamps that fit the hose right. its only like 5 bucks more and a smart choice... or atleast was for me since my clamps were rusted over and needed to be cut off with heavy duty scissors. and i had to cut the hose's on either side to get it off as the lines connecting are metal and u dont want to flex them too much.
didnt cost me more than 30 bucks at autozone to buy parts and something to drink while i was under the car lol.