Socketing kit for installing a Hondata S300J into JDM "square case" OBD1 ECU's. This socketing kit contains everything needed to install the Hondata S300J into the JDM ECU other than the S300J board itself. This is the same kit that is included with the S300J when purchased from us. If you are purchasing an S300J, you do NOT need to add this to your order.