Blow-Off Valves & VTA Adapters for Mercedes Turbo Engines

Blow-Off Valves & VTA Adapters for Mercedes Turbo Engines

Blow-off valves (BOVs)—also commonly referred to as VTA (vent-to-atmosphere) adapters—release excess turbo pressure to atmosphere when you lift off the throttle. The result is the distinctive “whoosh” sound many Mercedes enthusiasts are after.

  • Vent-to-atmosphere (VTA) sound
  • Blow-off valve / VTA adapter options
  • Distinct turbo “whoosh” on shifts
  • Sound-focused modifications
  • May require tuning on some platforms

BOV vs VTA adapter: what’s the difference?

On many modern Mercedes platforms, a “BOV” upgrade is actually a VTA adapter that converts the factory diverter valve to vent air to atmosphere instead of recirculating it. Both achieve sound, but neither is primarily designed for added power.

Looking for performance instead of sound?

Mercedes turbo systems are typically optimized around recirculating diverter valves. If your goal is faster boost recovery, improved sealing, and consistent performance, a diverter valve upgrade is often the better solution. View diverter valves →

Fitment note: Blow-off valves and VTA adapters vary by engine platform, turbo configuration, and ECU strategy. Some applications may require tuning or supporting hardware to maintain drivability. Always verify fitment before ordering.
Mercedes blow-off valve VTA adapter installed on turbocharger for vent-to-atmosphere sound