If you have a Duratec then you can swap in a 2.5L from a fusion super easy. In a factory 2.3 car an unmodified 2.5 would put you in the ballpark of 180whp, I highly recommend it. If you have the Zetec, there aren't any easy swaps to my knowledge but admittedly I am not as familiar with that engine family. If it were my car and was some sort of low mileage gem I would consider picking up a scrap duratec focus and doing a 'chassis swap' but that's just imo.
Anything else is going to be a full drive train conversion pretty much. If you're talking about the ST ecoboost, you could do that but you'd have to run the engine on an aftermarket computer.
Anything else is going to be a full drive train conversion pretty much. If you're talking about the ST ecoboost, you could do that but you'd have to run the engine on an aftermarket computer.
