The current Viper has its hands full with the current Z06. the ZR1 has 150Hp over the Z06. A body kit and stickier tires (ACR) aren’t going to make up that kind of difference. Lets not forget the upgraded suspension on the ZR1 which b.asicly incorperates MR shocks with Launch control to get out of the hole. Sorry Dan the ACR isn’t touching the ZR1