By now, the name Shelby should be synonymous with speed. Since the '60s, Carroll Shelby's performance-car-building company has made some of the most balls-out, off-the-wall machines to ever rip across American roads. The Ford Mustang-based Shelbys have been no different. The Shelby GT500 has been one of the most exhilarating cars to drive. Though, now that the Mustang GT offers great performance and value in a neatly trimmed package, dropping extra dough on a Shelby seems a little questionable. New for 2011, Ford's Special Vehicles Team and Shelby took the already lightning-quick GT500 and refined it with patented tech and high-performance products born out of awesome collaborations. So how did they do? Read on to find out.