Does hp increase with a new lift pump?

A new lift pump can improve engine performance, particularly in diesel engines, by ensuring that fuel is delivered consistently and at the correct pressure. This can enhance combustion efficiency, potentially leading to a slight increase in horsepower (hp). However, the actual increase in hp will depend on various factors, including the engine's overall condition and tuning. If the pump is significantly more efficient than the old one, the gains could be more noticeable.