nvertheless, C6Z's run faster than whatever the 4 pt cage requirement is. as i recalled they lowered the requirement by .5 seconds because so many cars were capable of running faster from the factoruy
FWIW, the base C6s now are starting to keep up with little mods. Check this guys garage out. 04 GTP running low 11s and a LS3 C6 running high 11s with the same trap speed as the GP with just an intake and tune.