I've read alot of forums and website talking about legalizing a nissan skyline. But if you really want to legalize a skyline you need to check these links. I've realized that Motorex and Jk motors is all that people say that can legalize them but their wrong. Now that motoex is out of the picture Jk motors is legalizing them also. but, im going to go straight to the point. Again check out these links and it will give you

http://www.nhtsa.dot.gov/cars/rules/import/elig050108.pdf
http://www.nhtsa.dot.gov/cars/rules/import/elig050108.pdf
(http://www.nhtsa.dot.gov/cars/rules/import/elig050108.pdf)

these are official links from the DOT website check them out
1st link= list of regesterd RI shops in the US
2ndlink= cars that can be imported:rolleyes: