Post by
GraySilvia »
https://forums.nicoclub.com/graysilvia-u3605.html
Sat Aug 02, 2003 2:01 am
Actually, the last gen. of redtop motors has those little 'cooling fin' looking things on the front of the motor just under the valve cover. The S13 blacktops have them, if you know where one is you can look at. If it doesn't have the fins, then it's a very early redtop.