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would increase air flow into the engine? I do not know the stock dimesion after searching the past posts! The site explains it will fit F- series and excursions!
I believe it will fit the v10, the 5.4 has a single bore. In my experience, you should also do injectors, roughly 10% bigger than stock to compensate for the airflow.
I don't know what other mods you have tried, but a cold air kit, a program and exhaust are usually done before throttle bodies.