Need some help

[fixkick]

SO - 

I just removed the stat to replace it. The lip depth is 4mm, so Im going to use the felpro rubber o-ring.
Since my tracker is a 1992 1.6L 8 valve, is the 4mm lip OEM?  (4mm means newer revised manifold , nothing more)
Or are there some 8v with 4mm lip and some 8v with 1mm lip? (both 8v and 16v were both revised to 4mm by VIN date /Serials)

1992  is the first year of the changes, 1mm  to 4mm
and is complex by vin  numbers end serial  number,  each car class was  cut in  (updated ) based on VIN code.  
all makers of stat sell both stat /seal kits. , or 1 stat and 2 seals
some sell only  an naked stat, and seal is extra.
each 3rd part maker sells them as they wont

suzuki OEM even changed their rules, selling the kit,  and at one time 2 seals in the box wit stat.
GM oem , i do not know, but did sell both, as they did upgrade , in the same CAMI factory but only using there own VIN date rules, (sn/)

1- mm lasted from 1989 to 1992 and even 1993, ( they always make more engines than cars so the stock of  engines needed to be all used up first) production works that way.
that is why VIN 's are so important on all cars made for parts buys.  ALL are.
and know that  the newer car year is built on July 1.  way before, Jan1 next year, so they can as they say fill the production pipe line and have all new cars before  Mid December.
see that too to effects parts,???

the parts that changed  is Manifold part number and 1 seal.
there reason was told that it make the factory engine  assembly step way faster ,  no sealants needed.