Does anyone know what the micron ratings are for the 2 filter sections?

1. Main
2. bypass

It sounds like they are physically separated and requires a seal (25) on the clean side so they get routed to the proper ports b (engine bearings) and c (oil pan).

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked