When GM unveiled the 2009 G8 GXP at the New York Auto Show they said the 6.2L LS3 small-block V-8 engine is rated at 402 hp and 402 lb.-ft. of torque. But after the SAE dyno testing, it seems the car is giving more than paid for. The G8 GXP was officially rated at 415 hp and 415 lbs-ft.

GM will also offer the six speed manual transmission along with the standard six speed auto trans on the G8 GXP. The car’s LS3 V8 is the third engine available for the G8 line up joining the 261hp 3.6 V6 engine and the 360hp 6.0 V8 engine.

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Source: GM Inside News

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