cold air intake

A cheap way of adding horsepower, though not as much as ricers say they make. Usually add 5-8 on a four pot, 10-15 for a six and 15-30 for an 8. (K&N)

People often install them because they are a much cheaper (however less effective) alternative to turbocharging or supercharging. (Can also accompany a turbo and/ or a supercharger)

That civic has a cold air intake and a fartcan

I can't afford to turbo my car so I got a cold air intake

That GTP is nice it has a supercharger stock and the owner added a cold air intake