Fitment:
Subaru WRX 2008-2014
Each of AVO BOV’s comes with a removable plate that will allow a percentage of boost to vent to atmosphere. It still recirculates the majority of the air back into the system, which is important for keeping a smooth idle. Modern ECU’s on todays cars compensate for the amount of air that has been dumped back into the system, and when you simply remove that air, it leads to idle problems as it throws the system off temporarily.