Originally Posted by smack

depending on the design of the CAI, it can actually make it harder to get the air in to the engine. most of the ones i have seen increase the length of the pipe substantially and decrease the diameter, so that it can fit down in the fender.

it doesn't matter if the air you're pulling in near freezing, if it is harder to get it there, it's not going to help. the whole point is to make it easier to it to breath. imagine running a marathon, but only being able to breath through a straw with ice around it. doesn't sound very appealing, does it?

plus, it is not like there is going to be a substantial difference in air temps from the front of the engine compartment to the fender well for example. maybe 10 degrees. maybe.