What component increases air pressure in the intake manifold and is often found on larger vehicles?

The component that increases air pressure in the intake manifold and is commonly found on larger vehicles is the supercharger. Superchargers work by compressing the air that enters the engine, allowing more air (and thus more oxygen) to reach the combustion chamber. This process enables the engine to burn more fuel, resulting in a significant increase in power output.

Superchargers are typically driven directly by the engine's crankshaft through a belt system, which allows for instant power without the lag that can be associated with turbochargers that rely on exhaust gases for power. Larger vehicles, which often require greater power and performance efficiency, benefit from the immediate boost provided by a supercharger during acceleration.

While turbochargers and compressors also increase air pressure in a similar manner, the choice of supercharger is particularly relevant in the context of larger vehicles, as they are capable of delivering power boosts quickly and effectively. An intercooler, on the other hand, is used for cooling the compressed air before it enters the intake manifold, but it does not itself increase air pressure. Therefore, supercharger is the most appropriate answer for this question.