[DylanJZA]

I understand as I have worked with Toyota in an engineering capacity and know much of the company, but it still doesn't explain why they used the Tokyo Roki and then months and months later decided the 1st gen filter is fine.

Cost would be something that was known prior to release. The Toyota filter is nearly half the cost in fact, likely due to being made in Thailand etc. There was likely a better reason than that IMO.

 

[DylanJZA]

No idea, but I remember folks saying the bypass was different and until I see something official I'm sticking with -170. But I'd love if that was the case because I have a few TRD 1st gen filters I'd love to use tbh.

 

[DylanJZA]

The pressure relief spec is different on the 2nd gen Subaru filter vs 1st gen, so I'll stick with the 2nd gen specific filter. If Subaru felt the need to do that then I'll go with their decision.

You can seemingly still order the Toyota packaged variant (SU003-08412), so I'm not sure where the supersession talk even began. Is that a new thing in the Toyota EPC?

EDIT: Found some sites showing 90915YZZS1 as a replacement/supersession. Interesting...

 

[DylanJZA]

I'm not second guessing fitment/usage. I'm second guessing Toyota switching from a specific Subaru filter to a Toyota branded one after supplying the Subaru one for months (with a specific P/N) before the switch.

I doubt there would be an issue, but that gives me pause. If the filter specs are truly different I'll stick with the -170. If they're the same then maybe Toyota is just weird...