IS ITTHE YEAR MODEL? CAN I SWAP MY D16 FOR B16A EF FOR MY CIVIC '00? IS IT BOLT-ON READY? CAN I MODIFY THE INTAKE MANIFOLD AND PISTONS OF B16A EF TO B16B?

the ef is obd0 and the eg is obd1 and the ek is obd2. i would go with a b18c, but thats just me. and get an obd1 or 2 motor. if you get an obd2 motor convert it to obd1. this is for performance reasons. the obd2 ecu isn't good for tuning. run your car with a obd1 cromed ecu. and to make a b16a, ab16b than you would need differnt pistons, head gasket, cams , and intake manifold, and imo it's not worth the hassel good luck with whatever you do

WHAT DO YOU MEAN BY OBD?

EF = cable trans
EG= hydro trans

HOW ABOUT EK? IS IT THE SAME AS EG? IF YOU WERE IN MY POSITION , WHICH IS BETTER EK OR EG?

umm please turn off caps, it jsut annoys me when it's all in caps.

EF will be the 88-91 years running OBD0, EG 92-95 OBD1, EK 96+ OBD2a/b.

If I could I'll get the EG 92-95 OBD1 whice is a B16A2 engine. If you can't find a 92-95 B16A2 jsut get a B16A2(OBD2) 99 si's or the 96+ SiR and get a ECU jumper cable with a OBD1 ECU just like civicB18c5 suggested.