i ever read an article of comparison between ver s,spec 1,2, and
3 before.
basically spec 1 was just a vtec version of version S,with a few
tweaks.
spec 2 and 3 are almost the same,only minimal differences,but i
forgot what are the differences..
PB1s are quite common in sg,the only version of S4 that is very
very very rare is the version R.
my bro was one of the few who rode ver R before,and he said there
are only few ver R that made it in sg at that time(which was close
to 11 years ago)