I accept that the oil feed system runs at higher pressure than most automotive systems, but has anyone seen documentation that the filter is on the OUTLET side of the pump, not on the suction side? I can't believe that someone would ever design an engine that way. I agree that the price difference is too small to bother with-most of us do an annual change only I suspect, but a generic filter might be needed in an emergency. Over years of building racing engines, I've never seen a filter fail, even on engines with oversized pumps