What increases the amount of air entering the engine's cylinders?

The turbocharger is designed to significantly enhance engine performance by increasing the amount of air entering the engine's cylinders. It accomplishes this by using the engine's exhaust gases to spin a turbine connected to a compressor that draws in and compresses more air than the engine would typically intake. This higher density of air allows for a more efficient combustion process, which can lead to greater power output from the engine. As a result, the turbo plays a crucial role in improving engine efficiency, performance, and responsiveness, especially in vehicles designed for higher speed and performance.

In contrast, fuel lines are responsible for delivering fuel to the engine, while the choke regulates air intake in carbureted engines during cold starts but does not increase overall air intake when the engine is running normally. The air filter is essential for keeping dirt and debris from entering the engine, but it does not increase the volume of air that reaches the cylinders.