2008 Ford Mustang Shelby Cobra GT500KR 40th Anniversary Edition: In celebration of the fortieth anniversary of the original, Ford and Shelby introduce the new 'King of the Road' Mustang with the 540-horsepower 2008 Ford Shelby GT500KR. Featuring classic Shelby KR design cues and Ford Racing performance upgrades, the GT500KR will be produced in a limited-run of 1000 units arriving spring 2008. (03/30/2007)