You have an in-tank filter which is a PITA to change. Scheduled change is at 60kmiles. I don't have a part number, but I know the price is ~$60-$80's. With your VIN, any dealership should be able to tell you the part number.
Or, you can go to subarugenuineparts.com and use their OEM catalog to order it. Browse "Replacement Parts" (mechanical), Search your year, make, and model. Click "Maintenance & Lubrication," "Engine Service," "Filters," then "Fuel Filters." Add the 'w/ turbo' and you're done.
"We live for a good time, not a long time."
RIP Colin McRae