Blow Off Valves (BOVs) – Maximize Performance & Turbo Longevity

Optimize your turbocharger system with premium BOVs for smooth throttle response and surge prevention. Ideal for aftermarket setups. Experience better boost control, smoother shifts, and extended turbo life.

Blow Off Valves (BOVs) – Maximize Performance & Turbo Longevity

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Blow Off Valve Selection Guide

Technical Information & Buying Guide

A blow-off valve, or BOV, releases pressurised air from the intake system when the throttle closes. Correct valve sizing, spring selection and installation can help control pressure reversal across the compressor and support consistent operation between gear changes.

Before ordering, confirm the valve diameter, mounting flange, available space and whether your setup requires atmospheric or recirculated discharge. Spring pressure should suit the engine’s manifold-vacuum characteristics. On airflow-metered vehicles, changing from a recirculating valve to an atmospheric setup may affect drivability or fuelling.

  • Confirm the mounting flange and intake-pipe location
  • Match the spring setup to manifold vacuum
  • Consider the engine-management and airflow-meter arrangement

FAQ

  • What does a blow-off valve do?
    It opens when the throttle closes under boost, allowing trapped charge air to escape or recirculate instead of pushing back against the compressor.

  • Does a BOV increase horsepower?
    A BOV is primarily a pressure-control component. It does not create additional turbo airflow or guarantee a power increase.

  • Can I vent my BOV to atmosphere?
    That depends on the valve, vehicle and engine-management system. Some airflow-metered vehicles operate better with a recirculating arrangement.