All direct import vehicles must pass compliance testing and smog testing in CA which can add to the price of the vehicle between $7500-$12000. In addition, there will be approximately 8 months of waiting time to perform all testing and modifications. These requirements apply in CA only.
You can find additional information on the California Air Resources Board website here https://ww2.arb.ca.gov/frequently-asked-questions?keywords=&page=3
And the California DMV website is here https://www.dmv.ca.gov/portal/handbook/vehicle-industry-registration-procedures-manual-2/nonresident-vehicles/direct-import-vehicles/