This is what I use 99% at 20 microns EAO11 is the size for CatsPer the K&N SS-2010 Website, this unit does not have an "Anti Drain-Back" Valve (the black rubber valve visible under the small holes surrounding the one big mounting hole) which Factory Units do have and is GOOD to have so the oil does not drain out of the oil galleries and back to the crankcase after engine shutdown.
I also could not find anywhere what the "Micron" Filter Rating is for this unit which is important to know.
For me, NOPE!
AMSOIL Oil Filter
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