Cold air intakes move the air filter outside of the engine compartment so that cooler air can be sucked into the engine for combustion. Cooler air brings more oxygen (denser air) into the combustion chamber and that means more power.
There are many blogs and products online that claim these kits add as much as 30bhp to your car. The popular Youtuber’s “Mighty Car Mods” put this myth to bed in this video; with a little help from science and a mechanic. The most basic cold air intake consists of a long metal or plastic tube leading to a conical air filter. Power may actually be lost at certain engine speeds and gained at others. Because of the reduced covering, intake noise is usually increased.
