 The production version of the GXP was more powerful with its LS3 V8 producing and of torque.The six-speed automatic was standard while a six-speed Tremec TR-6060 manual transmission was available.The GXP reached from a standstill in 4.5 seconds, a quarter-mile time of 13.0 seconds at , and 0.90"g" (8.8 m/s2) of lateral acceleration on a skidpad.