Neh, lots of people run CAIs during winter. A hydroshield will block out sloshy water on warmer days and the required car washes to remove salt, and the point at which the intake is no longer able to draw in air would mean your entire bumper is full of snow and ice. Not good anyway.

What I've heard on the intarweb full of the purple-monkey-dishwasher effect:

There is a "slight chance" of throttle icing with cars given the fact that the air is still rushing in quite cold. Ice "can" develop, impeding butterfly movement. I'm not 100% if this is even possible on this car. I don't think they develop this car for Canadian winters, but mine has still to go through one. 2008s are quite rare in Winnipeg.

There's also a "chance" that the engine would remap the fuel delivery given the large amount of cold dense air, causing other "issues" (running rich & wasting gas, hesitation, etc). A "Winter mode", or so I've heard, exists on certain cars. In fact, it's rumoured that a few cars out there have been dyno'd and actually produced less power in sub-0C temperatures with a cold air intake. *shrug*

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I've heard more speculation and rumour than actual hard evidence that it's actually bad for anything. When somebody says something is bad, they should provide more than just "it can damage the motor" and instead explain WHY can it damage the motor.
If they can't answer that, they don't know what they're talking about and are just spitting out what they've heard from somebody else, and on and on.
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Temperature of the air is not the thing to focus on. It's the increased density of the air that gives you the extra power. And it just so happens that colder air is denser than warmer air.

From what I've read, a cai will pull in air that is around ambient temperature, as compared to a sri or a stock location that can pull in air 20-50 degrees above ambient or more. That's where you gain power, by drawing in air that's not heated by the engine, thus giving you more dense air, but it's not necessarily colder than ambient temps. The car should be able to handle air that's well into the sub zero range, so I'd say keep it on. In other cars I've had I've always left it on.
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Temperature is something important to focus on because the density of the air is related to the temerature by the eq d = p/(R*T) [density = pressure / (specific gas constant * temperature)], however not quite as important as altitude/barometric pressure and humidity. "thus giving you more dense air, but it's not necessarily colder than ambient temps." :huh: You'd never be able to get cooler than ambient air anyway, without some sort of refridgerant system. But everybody has the same general idea.

Anyway, if it helps, a friend has run a CAI on her late 90s 2.0 Golf for years through Canadian winters with no issues, and that car just. won't. die. I'll be running my SRI through the winter and then it comes off for good.
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" but i think ill just keep my CAI but if i have any malfunction like hesitation or wasting gas ill juste take it off or simply remove one part to make it a SRI.
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Would this even work with the Injen intake? I removed mine due to a cel and never put it back on because winter is coming up but if I can just put the main pipe on with the filter I will do that. Won't this just suck hot air though?
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Something kind of cool that I was told yesterday by my mechanic at the Mi