I buy mine from the local big4 nippon shop. They are pretty much a stock/standard item. Cost about $3 bucks. Very small, clear plastic. I installed mine just after the petcock..not a lot of free room but enough for this little guy.
Looks exactly like this:
K&N inline filter
[ This message was edited by: Jcatbert on 2005-04-13 19:40 ]