Not only did the new 5.3L V8 weigh less than the previous GTP 3.8L supercharged V6, it was also more powerful. The Grand Prix GXP could generate 303 horsepower and 323-pound feet of torque for a ...

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A dealership employee somewhere has posted a pic of GM's inventory controls website in which the engine option for the 2009 Pontiac G8 GXP is revealed to be none other than the LS3 6.2L V8.

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