A "********" ACR has a lap timer, is Radio delete, hood pad delete, rear carpet delete, and Carbon fiber Speaker covers in the interior and Carbon Fiber Battery cover. The “standard” ACR is 40 pounds lighter than the regular Viper coupe, the "*********" package saves an additional 40 pounds through the removal of the audio system, underhood silencer pad, trunk carpet, and tire inflator. The radio is replaced by a lightweight cover that can be configured to mount the lap timer that comes with the package.
What is one of the best benefits of the VCA is the forums, the years of sharing knowledge, with a simple search you can find most anything you want, the attached link may have some information to help you out:
http://forums.viperclub.org/threads/641206-Radio-install-in-an-ACR-********