Wow..........some guys get worked up over stuff that is just brutally simple...........You take two IDENTICAL filter housings, one has a 100 micron element, one has a 10 micron. The latter WILL be more restrictive, because it is finer.

Soooo, you put the 100 micron before the pump, to basically keep large debris out of the pump. Then you put the smaller one AFTER the pump, to catch what the first one did not and the small debris the pump itself makes. Because AFTER the pump, we have items that are MORE sensitive to small debris than the pump itself. Oh, I don't know, like maybe regulators, injectors or needle and seats.

AS far as those FRAM filters, they are pretty restrictive. They are rated in GPH of flow, but can't remember what that is. Also they are paper element filters and also many guys plumbing is not up to snuff. So you add up a couple of these and you get a pump starving for fuel.

Monte