Jet engine
In 1968, Ford offered a special edition of the Shelby Mustang, called the GT500KR, which stood for King of the Road. It had the 428 c.i. Cobra Jet engine introduced the same year. In early 2007, Shelby had announced that they would release a new GT500KR based on S-197 Mustangs for the 2009 model year. The package was only available through Shelby for all 05+ S-197 based GT500's. The K.I.T.T. in the "Knight Rider 2008" television pilot movie is a modified black Shelby GT500KR Mustang..