Originally Posted by 4WD
They don't put any info on the box … guess since they are really meant for fleet purchases
50% at 12 microns, 98 2/3% at 25 microns. Not Ultra or bypass filter numbers, but more than good enough. Biggest thing with Baldwin is price, they can either be a good deal or big $, have to shop around & catch the deals when they're available. AAP/Carquest thinks enough of them to make then their "HD" oil filters, can't be all bad.