I bought a b16 head off of this forum that came with two sets of internals. The two cam sets appear to be a little different -- half way up on one set I can see a letter K near the little hole and on the other set there is an F and a half turn past that is an M. Are these both b16 cams or could one be a set of ctr cams. I also have two sets of cam caps. One set appears is a rounded and seems to match up against the girdles better. The other set is more angular but I've seen these on pictures of the newer B16a Sir2 heads. Any help with identification of these parts? Just wondering which would be better to use.

 

You need to find out which set of caps are for your head because the others will not fit right.