Although we thoroughly enjoyed the fleeting time we spent with the Pontiac G8 GT, what whith its 361 horsepower and 385 pound-feet of torque and all, it's the upcoming GXP model that truly looks to catapult the Australian-bred sedan back into musclecar territory. We, along with just about every other gearhead, are especially looking forward to the six-speed stick and clutch pedal with which the 6.2-liter LS3 V8 making 402 hp and 400 lb-ft of torque will be paired. Of course, the rest of the car needs to be up to snuff too, so we are happy to take a gander at these spy photos of a pre-production prototype in Australia that indicate the nineteen-inch GXP-specific wheels and big Brembo disc brakes are present and accounted for. A slightly revised front fascia with a lower splitter combine with the rear diffuser to further signify that this is the high-zoot version of Pontiac's sport sedan.