meleagant8,

by "cold air", di ibig sabihin na malamig na air neccesarily as in malamig yung climate... basta cooler air than the usual hot air around the exhaust manifold and engine. usually yung stock air intake malapit sa engine and high up near the hood where the air is warmest.

you can extend the air intake by fabricating custom ducting and moving the opening away from the engine where the air is cooler. yung iba, pababa yung intake, bumper level na yung intake nila... but this isn't good for our floods pag extended yung intake like that, you'll notice a slight gain in power (depending on how restricted the stock intake was compared to the new setup) in any climate and ambient temperature.