It is more trouble than it is worth. I am skeptical that that would actually do anything noticable. I think the ducting would cause more of a restriction than just having an open filter.

Sounds like a silly excuse for ram air on an application that won't need it. Call me a skeptic, but until someone does some solid tests that prove cold, fresh air is better than air sucked from the engine bay on an intercooled turbo setup, I am not going to be adding unnecessary stuff to cramp my already cramped engine bay.