Z06 Needs a driver mod. With the new Eagle F1 SuperCar G:2 tires it should've run better that an 11.90. Hell I ran an 11.8 with my Dads '07 which had none of the ZR1 carbon add-ons and older series run flats at Fon"up hill and into a headwind"tana on my 2nd pass and I can't drive.