With an out-of-state titled car, the California registration using SB100 (specialty construction) is much easier if your car has at least 7500 miles on the odometer. The rest of the process is fairly straightforward: get one of the 500 numbers allotted for that calendar year, go to California CHP for a VIN attachment and to prove parts aren't stolen, then go to a smog referree, then register. You can Google California SB100 to get lots of info. The Cobra guys' sites are very informative. Best of luck and please let others know your experience. I did it in Jan. 2013 and it was not too bad.