The Shelby Mustang is a high performance variant of the Ford Mustang which was built by Shelby American from 1965 through 1970. Following the introduction of the fifth generation Ford Mustang, the Shelby nameplate was revived in 2007 for new high performance versions of the Mustang.
For 1967, the GT 350 carried over the K-Code high performance 289 with a 'COBRA' aluminum hi-rise. The GT 500 was added to the lineup, equipped with the 428 Police Interceptor. These later cars carried over few of the performance modifications of the 1965–66 GT350s, although they did feature more cosmetic changes.
In September 1967, production was moved to the A.O. Smith Company of Ionia, Michigan, under Ford control. Shelby American had substantially less involvement after this time.
For 1968, the Cobra name was applied to both models, and they were now marketed as the Shelby Cobra GT 350 and the Shelby Cobra GT 500. In February 1968, the Cobra GT 500-KR "King of the Road" debuted; under the hood was a 428 cubic-inch Cobra Jet V8 which was rated at 335 horsepower (250 kW).
Shelby and Ford returned for the 2007 model year with the Shelby GT500. Introduced at the 2003 New York International Auto Show, the GT500 uses a 5.4 L (330 CID) Modular 500 hp (370 kW) supercharged V8. Features include the Tremec TR-6060 6-speed manual transmission, suspension tuning, a body kit, and 18 inch wheels.