Originally Posted By: Bottom_Feeder
The 3593A and its equivalents are designed for Hondas. They have a more deeply recessed threaded area then what the EJ25 was designed for, they have anti-drainback valves that the EJ25 does not need, and they have bypass valve pressures that are half of what Subaru specs. Fram does not make a Subaru-specific filter. Wix does but it's the smaller 'turbo' size.
The Purolator 14460 and its equivalents like the Bosch 3310 and Motorcraft 1998 are all correct. They have the correct thread depth, no ADBV and the correct high bypass valve setting.
Basically if anything cross-references back to a 3593A it's a Honda filter.
some good info here.. question other than by pass settings which for this EJ25 is an interesting topic in itself how bout ph6607, ph7317, ph9688?