u have to comply them, by that i mean u have to make the car road registerable by american laws b4 u put it on the road. But once that is done it will be street legal. However this is an expencive process. I recommend alot of research b4 u embark on such a venture.
That would be really expincive and more work than its worth. Its cheaper to find a US 1985-87 SR-5 or GT-S corolla, and put on a JDM front end and emblems in my opinion.
There are some cars that can never be street legal over here. In Canada Mitsubishi Evo. 8's (imported) arn't legal, but i have seen one in Vancouver. Maybe it was a clone?
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" Before You Drive, Customize Your Ride" -Initial-D