I think the HP battles between GM and Dodge are well documented and we the car fans are the winners. Look at the Muscle car years and the battle between Viper and Corvette. I feel GM blinked first by going the supercharger route. And it seems they will take the easy out with the Z-28. I think the 6.4 has alot more there yet to be tapped. VVT and some aggressive fuel mapping and the 550 HP we have heard could be over 600HP. With Chevy getting there by force induction. Everyone will have there opinion and this is mine. Superchargers are for the aftermarket. Don't be lazy with the R&D and continue to make inroads for future platforms. If it means we look to be 2nd or even 3rd best in a timed straight line then so be it.