Let me see if I can explain this AGIAN.

It is illegal to IMPORT a "main" automotive component or automobile that does not certify to US standards UNLESS they are imported in "OFF-ROAD USE ONLY" status.

MAin Automotive components include: Airbags, Engines, Trannies, Chassis, etc.

If you can not legally import the parts for road use....than you can NOT use them for Kit Car Status.

Don't put the buggy in front of the horse here.

1st: Figure out how you are legally going to get the car/parts into the united states.....
2nd: worry about regisration by the individual states.

You'll never get past the 1st step.

Charles