Boomba Recirculating Bypass Valve - 2004-2021 Subaru STI

SKU: 001000220100

$297.90 $331

Subaru STi Recirculating Bypass Valve by Boomba Racing

This high performance recirculating bypass valve for the WRX STi 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.


  • Direct replacement for the OEM BPV
  • Aircraft grade billet aluminum
  • Larger cross section compared to stock
  • 100% recirculating design
  • Pressure tested to 70psi


  • Higher flow than stock
  • Easy to install and no re-tune is needed


  • 2004 - 2021 Subaru STI

What's In The Box?

  • 1 - Bypass Valve
  • All Mounting Hardware



  • Manufacturer Standard Warranty

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