This EJ205 also has the AVCS choice to operate For added performance. To run the AVCS, the avcs harness as well as the avcs ecu is needed. On the other hand, This really is optional, you don’t should run the avcs to make the motor fit in the 2002 to 2005 WRX. It's a immediate long block alternative for 2002 to 2005 Subaru WRX.The whole WRX assort