Boomba Recirculating Bypass Valve Subaru WRX STI (04-21) Anodize or Aluminum

Fitment Information Subaru WRX STI (2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021) Emissions Compliance This item does not have a CARB EO Number and does not ship to California or any CARB states. Specs & Features Larger cross section compared to stock 100% recirculating Higher flow Pressure tested to 70 PSI Easy install No need for re-tune Product Description This high performance recirculating bypass valve is precision machined out of aircraft grade billet aluminum. It features an internal brass piston design and is pressure tested to withstand over 70psi, allowing it to compliment even the most aggressive turbo builds. Spring pre-load determines the pressure differential required across the piston before the BOV opens and releases the pressurized intake charge. Designed to be a replacement for the OEM bypass valve and is available in 4 different colors. **For Off-Road Use Only** Many Boomba Racing pro