The Chevrolet Corvette ZR1 production version debuted at the 2008 North American International Auto Show and became available as a 2009 model. The ZR1 was formally announced in a December 2007 press statement by General Motors, where it was revealed that their target of 100 horsepower/liter (1.64 hp/cu in) has been reached by a new "LS9" engine, an Eaton-supercharged 6.2-liter engine producing a