How does a cold-air intake kit improve performance?

A cold-air intake kit significantly enhances engine performance by enabling the engine to draw in cooler, denser air from outside the engine bay instead of the warmer air that is typically found under the hood. When an engine receives cooler air, it results in a higher air density, which can improve the combustion process. Denser air contains more oxygen, allowing for a more efficient fuel burn, which contributes to increased horsepower and torque.

This enhancement leads to better acceleration and overall engine performance, particularly during high RPMs. Moreover, the improved airflow allows the engine to respond more quickly and efficiently to the throttle input, making the driving experience more engaging.

While other options may have associations with performance attributes, they do not directly relate to the primary function of a cold-air intake kit in the same way.