yeah, that's it! guy who has this C6 has a C6Z as well and says the reg C6 with mods is as quick if not quicker than the C6Z.. with those numbers it's hard to argue... look at the way the speedo climbs, remember that the roller is generating the right amount of drag, weight and actual drag increased with speed in that video.. an example the runs on a mustang dyno calibrated correctly last alot longer than a Dynojet run because of the dyno "simulating" a real world experience yet that needle climbs like NOTHING ...