Quote Originally Posted by AlaskaVX View Post
I am 99% sure that is called the "EVAP can". I remember some argument with the emissions guy about it not being there after the SC install.

On the emissions diagram under the hood it is shown, and you will fail the visual emissions check without it. But as for what it does... I don't have a clue

Well,here in NYC they don't perform a visual emission check,actually they don't even lift the hood for any reason but more likely the safety one.