not the year of the b18b, the year of your car that you want to put the b1 into is what you need to figure out. if the b1 is 94-95 then its obd1, if its 96+ its obd2. if it is obd2 you will notice extra evap equipment on the intake manifold, and a crankshaft fluctuation sensor located just above the crank. if the b1 is an obd2 engine you will need to downgrade to either obd1 or 0 depending on what year your car is.