Haha, its the chassis code for the '84-89 300ZX. My first fun car was an '88 300ZX that I bought in high school when I was 16, 1998. I used the screen name on z31.com, so I just use it on all the forums now. I love those cars, especially the '87-89 facelift models. Fantastic car to road trip in, could really put away the miles in those. I put something like 65,000 miles on it in 3 years.