It is my understanding the all modern vehicles are all 50 state and Canadian smog legal.
By buying out of state, you will not however save on sales tax. You will pay the same tax upon registering the car as if purchased locally. They changed the rules within the past year, it used to be, you could purchase an Non California vehicle, not bring it into CAL for whatever reason, and then after 90 days, bring it into CAL and you would be sales tax exempt.
The DMV has gotten smart and modernised with the internet times, and now eliminated waiver of use/sales tax.
Well I went ahead and bought it...it should be here in a couple of weeks. I checked every Ferrari / Maserati dealer in California, Nevada and Arizona. It wasn't easy finding a manual that wasn't some awful color or didn't have something really wrong with it. If it doesn't work I may be able to register it in Arizona as a nonresident, we'll see.