We had a feeling GM was sandbagging us with the production specs of the 2009 Corvette ZR1 back in December. 620 horses is equal to one hundred horsepower per liter they told us. Revised specs in the Spring, we heard. Well, it's unveiling time at the Museum's C5/C6 Bash and GM finally makes the Supercharged LS9 6.2L V8 power specs official: The new 2009 Corvette ZR1 produces 638 horsepower and 604 lb-ft of torque. [More]
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[VIDEO] GM Releases Official Corvette ZR1 Specs: 638 hp and 205 mph
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