This EJ205 also has the AVCS choice to run for additional functionality. To run the AVCS, the avcs harness and also the avcs ecu is needed. Nonetheless, this is optional, you don’t have to run the avcs to produce the motor fit within your 2002 to 2005 WRX. This is a immediate prolonged block substitution for 2002 to 2005 Subaru WRX.It seems like