Like We said earlier... We are working on a complete solution as we speak. We can all sit around and argue about micron rating's, but I don't see the point. Even the different filter manufacture's will tell you different things about the micron ratings. We did research into the factory filter to find what we thought to be an "equal" not better filter. (also fitting in the factory location). We did not see it as crucial as this is already a two filter system. However, the new complete system we are working on should make everyone happy..... High flow, clean fuel.