When I bought my car it had, still has a Turbo XS BOV on it. I was able to get the stock BPV from the previous owner, but there is no O-ring, (or O-rings?) on he bottom where it connects to the return hose.

Can anyone tell me how many, and what size the O-ring is? I need to go to the Subie dealer to pick up some parts, but would like to know beore I go what I need.

Thanks very much.