Wix oil filter # 51515 are design to remove down to 20 microns, their race filter R51515 filters down to 40 microns
Both have built in internal bypasses to insure the oil flows into the motor with cold oil, no matter what weight your using.
I use the bigger NASCAR race type oil filter Wix #51222R on a remote mount on the front motor plate. I'm not sure what size it filters down to
I'll find out now though since you made me think of that