Depends on how "plug and play" you are expecting. Mechanically, the non-VTEC B18 motors are pretty much the same. The OBD2 system will be looking for an O2 sensor downstream of the cat, so you'll have to add that if you're using the exhaust system from the B18A1 donor. Otherwise, I think all of the sensors are the same. I'd like to think the connectors are consistent, but there are no guarantees there.