The Turbosmart Kompact Plumb Back blow-off valve is a full recirculating BOV that returns excess boost pressure to the intake system and is tuned for Subaru applications. Its plumb-back design keeps charge air in the intake for quiet, unobtrusive operation while delivering the reliability and control benefits expected from a quality BOV for turbocharged Subaru setups.
Turbosmart BOV Kompact Plumb Back - Subaru