Just to show a power to weight difference of the C6Z vs an 03 KB Cobra. (03 Cobra coupes weigh in at around 3680lbs. an M6 2010 LS3 is about 3891lbs. both have Manual 6spds with the gearing and torque advantage leaning towards the 03 cobra) BTW this is a KB Cobra. well over 575whp and 550wtq!!
C6Z is a LIGHT bolt-on car. With full exhaust CAI and tune
You would get smoked by the C6Z06 @ your power level.
FYI Stock untuned C6Z's dyno around 440whp 435wtq. A tune alone they see about 460whp