From specialty cars like the Shelby GT350 and GT500 to Ford-engineered power houses like the SVT Cobra, high performance has almost always been synonymous with the Mustang. Now, on the heels of the vaunted limited-production Ford GT, the Blue Oval boys have announced the introduction of the 2007 Ford Mustang Shelby Cobra GT500. To celebrate a new era in high-performance Mustangs, we take a look back at the important Shelbys, Mach 1s, Cobras, and other Mustangs that set the precedent for the cars of today – and likely the cars of tomorrow.