The car's were imported under a "auto parts" shipping order. Bodies and engines separate, then reassembled and sold.
Now the interesting part: They were then registered under Californias SB100 because they couldn't pass smog.
California sent out letters 60 days in advance warning the car's would be confiscated, they weren't lieing!
Here's the link:
http://jalopnik.com/5371967/feds-sei...-gt+rs-in-cali