If any car summons 2Fast, 2Furious fantasies, it’s the purring Audi R8. This weekend, the German automaker is giving Mario Andretti wannabes a chance to experience their cars at the Homestead-Miami Speedway. The classic A4, the SUV-like Q7 (Seal and Heidi Klum’s choice wheels) and the curvaceous TT will be available on the tracks. So will the R8 – for the best drivers only. October 6 and 7; 2-hour sessions available through the day. RSVP necessary; no cover.1 Speedway Blvd.