Back in 2007, the king of American Muscle, Carroll Shelby, and his crew of engineers built an incredibly competent track package for the lowly V6 Mustang. The idea in 2007 was to create a performance Mustang that didn't cost your entire annual salary to insure. With the handling sorted and an optional supercharger installed, the 2007 Terlingua was an absolute monster from somewhat inauspicious beginnings. Consider that the V6 Mustang was Doctor Jekyll, and the Shelby Terlingua exists post Mister Hyde transformation. Turning a mild car into a wild car is always more exciting than starting with a wild car from the factory, especially when an old-school hot rodder like "Ol' Shel" is involved.