This BOV will fit Subaru WRX 2002-2007 and Subaru STI 2004-2017.
* Do not fit 2008-2016 WRX (non STI) *
This kit comes with a recirculating blow off valve, 1 x 1/4" hose and 1 x 1/2" hose and all necessary hardware (as shown in the pic).
- High Flow
With large 1.23" inlet and outlet, this BOV is sized perfectly to relieve any amount of boost pressure without fear of compressor surge. Don’t be fooled by giant oversized blow off valves, these inlet and outlet sizes were chosen to ensure the perfect balance of flow and to maintain boost in your system, without ruining response by dumping too much boost.
- Adj Relief Pressure
The BOV cap features adjustable spring tension, which allows for an adjustment when the blow off valve vents. A looser setting will make it act smooth and more like stock. Setting it harder will cause it to vent later and with significantly increased boost levels.
- Adj Flow Control
The unique design allows you to control the volume of air released when the BOV vents. Adjusting the volume of air helps maintain the perfect amount of boost in your system during shifts without causing compressor surge. Venting too little can damage the turbo, venting too much air can make the throttle less responsive.
-Recirculation is Job No.1
It is vital that a blow off valve for your WRX/STI recirculates the air back to the intake track to maintain proper air-fuel ratio and driveability between shifts. While this can be set up as a vent-to-atmosphere style blow off valve, we only recommend that on cars running aftermarket Speed Density type tuning (cars without mass airflow sensor).
If you are not satisfied with our product, please return it within 7 days for a full refund. Shipping fee is not refundable and it is a buyer's responsibility to send the item back if the item is not as described. Professional installation is highly recommended. Some of our products are designed exclusively for off-road and track racing only. ssqv. It is a buyer's responsibility to check the laws.