The 14b turbo came on all 1G 5 speed DSMs. The automatic 1G's came with a smaller turbo, the 13g. The T-25 turbo came on the 2G turbos, it is a smaller turbo than the 14b and what I have heard somewhat ineficient, thus the nickname T-2 slow.
Hope this helps...BTW there is probly a bizzilion threads on this already.