This EJ205 also has the AVCS option to run For added functionality. To operate the AVCS, the avcs harness and also the avcs ecu is needed. Nevertheless, This is often optional, you don’t must run the avcs for making the motor suit in your 2002 to 2005 WRX. It is just a direct extensive block replacement for 2002 to 2005 Subaru WRX.All the WRX arr