i know recently when i went to purchase a fuel filter from Ford dealership, they asked me which fuel filter setup do i have. me having no clue, except thinking 1 in and 1 out, well the ford guy told me that they make 2 different kinds for the ST, and he had to come out and look at my truck to figure out which 1 i needed. mine took the 1 in 1, not the 1 in 2. not sure if this helps any, and im sure it doesnt. but just thought i'd key that factor in. i cant remember what part number my ranger takes, so i cant determine the answer that way either. Ranger is 1995, ST is 2004