i guess no one really paid attention, they are testing a turbo H6 drivetrain....in a legacy, but thats not to say its going to actually be in a legacy. I doubt they would put it in an impreza, it could possibly be the H6TT drivetrain rumored to be for the B11S.
it should be noted that i dont actually know its for sure turbo, but using some common sense and logic, current 3.0 liter outputs 250, this is putting out 375 supposedly with same displacement, so i am assuming forced induction
Ben