I looked at them. But, nothing will make them "street legal" in CA.
The law here says that vehicles without a crash test rating can only be licensed as a Low Speed Vehicle (LSV). LSV's are restricted to being capable of only 25MPH or less...basically just golf carts....and LSV's cannot be operated on any roads with a speed limit above 35MPH.
If you can do it in your state, AWESOME. I think these side by side vehicles are great!
Best luck