I noticed recently on RockAuto they have a new Hengst H345W for Subarus. I cannot find the bypass pressure spec anywhere but when you check other applications that use the same filter of another brand (like a PH7317) Hengst shows a different number for those applications. Additionally the only filter cross reference they show for the H345W are the OE Subaru numbers and the Toyota numbers for the 86.
Looks like a good filter too:
Looks like a good filter too: