PF25 was changed to PF454 but is a smaller filter. I've read a few things about using a PF35 or a PF1218, they are supposed to be large filters and the PF1218 would have an anti-drainback valve. I haven't tried either one yet, may get one for my next oil change.
For the v6 guys I've seen a PF52 in place of a PF47. The PF52 is about 2 inches longer
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