[unstable bob gable]

I was reading an article about the new Viper in Hot Rod, and they described the engines VVT system. It uses what they are calling a Cam In Cam system, which allows the lobe separation angle to be altered, while lift and duration remain the same. I wonder if a system like this might make it to the aftermarket for other cam in block engines. If an OE manf. is using it, I would believe that it has a lot of testing behind it. It would def be cool to see a set up like this for traditional engines.