Originally Posted by SECS
A metal box with 4 high current transistors and injector current feedback
control circuit.
2 power wires input.
4 injector input wires.
4 injector output wires.
Have built these before for upgrading EEC4 ecu's
Or you could get just that off a honda CRX

. They have them as stock. I have one that you can buy if you can't fnd one in the scrappies.