Originally posted by hondajeff
Jdm b16a2 is obd1
usdm or jdm b16a3 is obd2
b16a2=92-95 jdm civic
b16a3=96-97 usdm delsol,99-00 jdm or usdm civic si
I'm not 100% sure if this is correct but you may want to check out the hybrid page. http://tech.hybridgarage.com
JDM motors were just B16A. you can only tell the difference in generation by transmission and OBD.
B16A3 was found only in USDM Del Sol VTEC (obd 1)
B16A2 was found only in USDM Civic Si (obd 2)