The first-gen Cobalt SS failed to deliver with a supercharged 2.0L Ecotec four-cylinder producing 205 horsepower and a cast of supporting components that did little to hide the Cobalt's rental car roots. But then something entirely unexpected happened. The GM Performance Division completely reworked the Cobalt SS for 2008, swapping in a more powerful turbocharged engine, upgrading the rest of the mechanicals, and tweaking the entire package on the world's most demanding race tracks, including the famed Nürburgring in Germany.

The result is – and we're not kidding here – the most impressive performance car to wear a bow-tie badge on sale today*. Exactly how General Motors turned a bottom-of-the-pack, front-wheel-drive econocar into a class-leading sport compact is revealed after the jump.
*My colleagues thought it best to explain this statement. There's not a bow-tie badge to be found on the Corvette and you can't find a Camaro SS on a dealer lot anywhere yet.