PERRIN Recirculation BOV (2015+ WRX)

  Cap, piston, and flange are CNC machined from 6061 billet aluminum materials Blow off valve body is CNC machined from a single block of aluminum  Anodized red finish High-flow Adjustable relief pressure with adjustable spring tension allows for an adjustment when the blow-off valve vents A looser setting will make it act smooth and more like stock while a harder setting will cause it to vent later and with significantly increased boost levels Adjustable flow control allows you to control the volume of air released when the blow-off valve vents Adjusting the volume of air helps maintain the perfect amount of boost in your system during shifts Recirculating the air recirculates the air back to the intake track to maintain proper air-fuel ratio and driveability between shifts Low maintenance and is quick and easy to disassemble Direct fit and pre-set adjustment