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Buick today debuted it's Regal GS show car at the 2010 Detroit Auto Show, its newest sports sedan with 255 turbocharged horsepower. The automaker designed the Regal GS on the appeal of a high-performance variant of the Regal, which was initially based on the Opel Insignia. Buick is hoping that its latest show car will appeal to performance enthusiasts. Available vide0 includes a b-roll package from the press conference, as well as interior/exterior footage of the Regal GS.