RM500-700. Last time I bought B18CR(P73 Spec 96) for rm700 and connect to JDM EK4(also spec 96) and its works better than a standard B16A(notes : my friend change his EK4 Auto to manual tranny, I proposed to him to purchase P73 96 Spec). I've also tried Spoon's B16B ECU to standard JDM EK4 spec 96 (manual tranny) and get the same result. I think they are the same.