I do not think that any of the C3 pulley generations have the taper on the front of the pulley. I know that my 1st gen pulley does not have a taper to it. Looks OEM to me.
This is what a C3 looks like:
This is what the stock pulley looks like:
Notice that the C3 is not tapered in the front!
Another picture of a C3 pulley: