Alfa Romeo is making a dramatic statement with the return of its twin-turbo V-6, but this time, exclusivity is the name of the game. The new Giulia and Quadrifoglio Stelvio special editions will be offered only in select markets, and U.S. buyers won’t see a single example. With extremely limited production numbers, these models are shaping up to be some of the rarest Alfa Romeos ever produced, rarer than even some hypercars.