There is an ad that has a Nissan GT-R R33 legally registered in Maryland with EPA Certification Label and DOT release, making it a US legal car.

http://cgi.ebay.com/ebaymotors/Free-1994-Nissan-Skyline-GTST-DOT-and-EPA-released-R33_W0QQitemZ300378408367QQcmdZViewItemQQptZUS_Cars_Trucks?hash=item45eff2c5af#ht_500wt_1182