be careful trying to smog with a JDM OBD2 motor. it's not going to recognize the proper smog devices required in California. for example your JDM gsr doesn't have the right crank angle sensor (US has it installed against the crank AND in the distrubutor. JDM only has the CAS in the distributor.) most smog stations are required to check if all sensors are in a ready state through the ECU. JDM ECU will give the wrong feedback and you will instantly fail wether or not your car passes the sniffer.