when buying a b20 which model do you want for a 91 crx , i know they have like the b20b etc. etc... thats what im wanting to know thanks

 

b20z

 

I am doing the same thing i just bought a b20b it has 126 hp and 134 ft it is also the newer model it is an obd2 motor but it does matter u just hook the obd1 wires and ecu up the b20z has more hp and the same amount of torque but it is the older motor and it is an obd1 motor so which ever u can find is ur best bet both hae the same buildabilty so its ur choice