The fl1a and fl1hp are both clean side bypass. There is zero benefit for the higher bypass pressure. The aforementioned are paper media, the rp is
synthetic with mesh to maintain pleat spacing and 99 percent efficient at 20 microns. Dp of rp is2 psig @ 20 cp as compared to4 psig for the fl-1a @8gpm the max flow of a Mellon hv
oil pump. I bet ur little phone techs can give u opinion next time get the facts