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Blow Off Valves 

A Blow Off or Bypass Valve used in a forced induction system is a crucial component turbocharger performance and reliability. It's function is to relieve charged air that becomes trapped during sudden closing of throttle plates. This significant restriction of air flow creates measurable instability and pressure fluctuations which can audibly be heard as what is know as surge. This compressor surge applies these unstable pressures to the compressor wheel and shaft potentially causing damage to the turbo's bearing assembly. 

At TurboSource we stock the widest selection of Blow Off & Re-circulation Valves. We provide detailed information for each unit outlining the individual dimensions and fitment options for you to make the best choice for your setup.
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Turbosmart Kompact Plumb Back Blow Off Valve
Turbosmart Kompact Plumb Back Nissan
Our Price: $139.99

  • Full recirculating BOV. The Plumb Back system recirculates all excess pressure back into the intake system. 
  • Great for enthusiasts not wanting to be noticed but wanting the performance and reliability benefits of a quality BOV. 
  • Comes in a choice of 20mm, 25mm or 34mm outlets.
  • Fits most cars using the factory BOSCH or DENSO bypass valves.
Turbosmart Kompact Plumb Back Subaru Blow Off Valve
Turbosmart Kompact Plumb Back Subaru
Our Price: $179.99

  • Full recirculating BOV. 
  • The Plumb Back system recirculates all excess pressure back into the intake system. 
  • Great for enthusiasts not wanting to be noticed but wanting the performace and reliability benefits of a quality BOV.
  • Designed to fit: Subaru WRX 01-07, Subaru WRX STi 01-08, Subaru Forester 05-07
Turbosmart Kompact Plumb Back Mazda/Subaru Blow Off Valve
Turbosmart Kompact Plumb Back Mazda/Subaru
Our Price: $179.99

  • Full recirculating BOV. 
  • The Plumb Back system recirculates all excess pressure back into the intake system.
  •  Great for enthusiasts not wanting to be noticed but wanting the performace and reliability benefits of a quality BOV.
  • Designed to fit: MazdaSpeed 3, 6, CX7, Subaru Legacy, Subaru Liberty GT, Subaru WRX 08+, Subaru Forester XT 08+
Turbosmart Nissan Kompact Plumb Back Blow Off Valve
Turbosmart Kompact Plumb Back - Nissan Juke
Our Price: $179.99

  • Full recirculating BOV. The Plumb Back system recirculates all excess pressure back into the intake system. 
  • Great for enthusiasts not wanting to be noticed but wanting the performace and reliability benefits of a quality BOV. 
  • Designed to Fit: Nissan Skyline GTS-T, GT-R, R32, R33, R34 and R35 (Requires 2 Dual Ports), Nissan Stagea – all models.

Turbosmart Kompact Dual Port Universal Blow Off Valve
Turbosmart Kompact Dual Port Universal
Our Price: $189.99

  • Dual outlet-type BOV. Dual Port vents both to the atmosphere and back into the air intake. Ports with sequential timing allow quieter operation during normal driving, while getting all the benefits of a vent-to-atmosphere BOV under race conditions. 
  • Easily converted to a full atmospheric or full bypass unit by using supplied port blanking plug.
  • Comes in a choice of 20mm, 25mm or 34mm outlets.
  • Fits most cars using the factory BOSCH or DENSO bypass valves.
Univesal Synchronic Diverter Valve Only
Our Price: $199.95

Synchronic DV is the first, truly compact, zero-diaphragm, high-flow Diverter Valve with a blistering actuation time measured at 25 milliseconds. Mass air flow (MAF) and speed density (MAP) applications can apply the new design in push or pull orientation with the ability to fully re-circulate or vent-to-atmosphere the valve�s discharge. Construction is based on near-net investment casting of aerospace-grade Aluminum for the body, followed by post-process CNC machining of all components including the forged billet 6061 actuator assembly. A complete selection of available mounting flanges are interchangeable between the SB and DV series and users can either upgrade from an existing BOV/DV by simply bolting on an adapter or weld on to a new project using the Aluminum or Stainless weld flanges. Boost/vacuum connections are made via 1/8th NPT threaded bosses that accept either Boost Connect� or included nickel-plated-brass barb fittings. Each assembly is pressure tested to withstand 60 psi and positive lock clamshell retainers are included with each assembly for fitment.
Turbosmart Vee Port Pro Blow Off Valve
Turbosmart Vee Port Pro Blow Off Valve
Our Price: $199.99

Newly redesigned for 2012!
Turbosmart Subaru WRX Vee Port Pro
Turbosmart Subaru Vee Port Pro
Our Price: $209.99

  • Features a unique, variable exhaust port system, providing superior venting of excess pressure. Small yet powerful. Ideal choice for street-tuned WRXs. Easy to install and setup.
  • Suits all WRX 2001-2007 models.
  • STi - MY01-current and Forester 05-07.
Turbosmart Plumb Back Recirculating Blow Off Valve
Turbosmart Plumb Back
Our Price: $289.99

Fully recirculated and sealed design for MAF based injection systems.
Turbosmart Race Port Blow Off Valve
Turbosmart Race Port
Our Price: $299.99

Turbosmart's largest & highest flowing BOV.