For those of us here in the US, who didn't get to experience Audi's 'RS' Models until the 2007 RS4, the 1999-2002 'B5' S4 is the connoseur's choice. With classic styling and proportions, a stout Twin-Turbo 2.7L V6, and all-wheel-drive, clean examples are fewer and farther between. This one has some choice modifications to bring it up to today's desired performance level.