Injector

The Injector is a part used in the Otto-engine. They're a more expensive alternative to the Carburettor.

Summary
Like The Carburettor, the injector increases the fuel efficiency of nearby cylinders, and slightly increases their power. The difference between the two is that where the carburettor achieves this by constantly mixing fuel into the cylinder's air intake, the injector projects short quirts of atomized fuel directly into the cylinder through a high-pressure nozzle, resulting in significant fuel savings.

On the other-hand, Injectors can't connect to turbo- or superchargers,

Because of tighter design tolerances, this part is more expensive than the carburettor, but the extra efficiency just might be worth it if you're not expecting the engine to be damaged very often.