RedFoxZ wrote:They did not come stock in Japan. They came in a special version of the Z31, known as the 200ZR. This was the highest version (along with the 300ZR, which was the VG30DE engine [or could have been a better tuned VG30E]) that was only sold in Japan. I would love to hear more about a RB20 swap, or a RB25 swap into a Z31. (I check the threads in Z31.com a few times a week) Knowing the RB series engines, i'm sure the RB20 is a boost whore, just like the RB25 and RB26. I hear the VG30ET from the newer Z31s can get some good horsepower from a fair amount of mods. Good luck to the motor swap whoever it is!
It may be a special edition Z31, but nevertheless, stock. As in, the RB20 was put in by Nissan from the factory. Sure it's a limited model, but *nissan* built it and sold it with the RB20. Stock means produced by the factory, not necessarily the base model engine.
Such as the RB26DETT came "stock" in the skyline. Only in a limited model called the GT-R, but still "stock."