Bingo. My R33 was the very last Skyline imported by MotorEx. Didn’t even have a regular VIN like most others because it was just kinda swept under the rug. I still have the paperwork from it from NHTSA/DOT’s investigators stating the legality which I had to scan and send to DMV, Progressive, and even eBay when I sold it. If I recall, 96-98 were the only ones that should’ve been legal due to those being the only ones crash tested, though they still didn’t have OBDII and most were imported as 1995 models for that reason. Mine was actually a 96.
There’s a big reason you see prices vary so much on R33s. The $15-20k ones are “state legal” therefore illegal. MotorEx cars fetch double that at the minimum.