Well since my car is an 00' and originally OBD2, I would assume you would just need a OBD2 to OBD1 Conversion Harness for the ECU...But I could be wrong, although when I did my OBD1 conversion from OBD2, I swapped the Injector Clips and ECU for OBD1 and bought the Conversion Harness. And it runs great!