the 23ns shares the same block and head design as the 2.0 in the focus minus the vvt. the ford vvt is all in the head and not the cams so in theory yes it should bolt up fine but ive never seen or heard of it done. they sell a header and catbacks for stock rangers so idk why you'd need a focus head for that to be viable. a larger tb would only help if your going boost otherwise it would hurt a stock motor or close to stock i/h/e but they dont make them anyways so dont trip.
bolt on header
MSDS - Exhaust Systems
Quote, originally posted by Archidictus » Either way, if your car's uniqueness is the only thing that makes you feel worthwhile, I suggest killing yourself now and sending me the money you would have otherwise wasted building some half-a$sed abortion of an automobile.