The use of an OBD-1 (92-95) ECU is needed for proper tuning of your high-performance engine. The SpeedFactory Racing ECU Conversion Harnesses allows you to use an OBD-1 Honda/Acura M/T ECU in an OBD-0, OBD2-A or OBD2-B vehicle. We designed our harnesses to be superior to other versions available on the market by using original equipment style ECU pin connections on all plugs, lengthening the harness leads to 7" and by using durable automotive grade wire that exceeds OEM specifications. Installation is simple and no cutting or soldering is necessary. Plugin one side to your OBD-1 ECU and the other side into your factory engine harness. SF-01-040 The SpeedFactory Racing Honda OBD1 (Vehicle) to OBD2A (ECU) REVERSE Conversion Harness allows you to use any OBD2A Honda/Acura M/T ECU in an OBD1 vehicle. For OBD-0 chassis there are additional parts required to complete your OBD-0 to OBD-1 conversion when using our harness. Additional Parts List: OBD-1 distributor OBD-1 4-wire Oxygen Sensor OBD-1 Honda ECU NOW SELLING - the rare and usually ultra-expensive OBD1-OBD2a harness for those wanting to run an ITR ECU in their OBD1 eg/dc etc