Boomba Bypass Valve Blue 2004-2021 STI

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 up to 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. 

 Features:

• Larger cross section compared to stock
• 100% recirculating
• Higher flow
• Pressure tested to 70 PSI
• Easy install
• No need for re-tune