This EJ205 also has the AVCS option to run For added effectiveness. To run the AVCS, the avcs harness as well as avcs ecu is required. Having said that, That is optional, you don’t need to operate the avcs to make the motor in shape inside your 2002 to 2005 https://keeganrpqli.blogspothub.com/28756382/getting-my-forged-ej20-motor-for-sale-to-work