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Forge Motorsport Atmospheric Blow Off Valve BOV / Dump & Diverter Valve Upgrade for BMW N20 2.0T Turbo - Direct Fit VTA Bypass/Pressure Relief Valve Kit F20 F22 F30 F10 1/2/3/5 Series 125i 220i 225i 228i 320i 328i 520i 528i Boost Leak Fix

Forge Motorsport Atmospheric Blow Off Valve BOV / Dump & Diverter Valve Upgrade for BMW N20 2.0T Turbo - Direct Fit VTA Bypass/Pressure Relief Valve Kit F20 F22 F30 F10 1/2/3/5 Series 125i 220i 225i 228i 320i 328i 520i 528i Boost Leak Fix

£215.49
£215.49
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Forge Atmospheric Valve Upgrade for BMW N20 2.0T

Want crisp boost, sharper response and that unmistakable turbo whoosh every time you lift? This Forge vent-to-atmosphere pressure relief valve is a direct-fit replacement for the factory electronic bypass unit on the BMW N20 2.0 litre turbocharged petrol engine. Built in aluminium with a robust piston assembly, it is designed to stop boost loss from the common split diaphragm issue and to deliver consistent performance on standard cars and tuned setups alike.

We run this on our own N20 projects and on countless customer vehicles. Feedback is the same every time – stronger boost holding, smooth drivability and an addictive sound that makes every gear change feel special.

Key reasons to choose this Forge upgrade

  • Direct-fit replacement for the OE electronically controlled bypass on N20 2.0T engines
  • Serviceable piston design in all aluminium for long term reliability
  • Keeps factory ECU control of the actuator for seamless part throttle manners
  • Stops pressure bleed caused by tired diaphragm units and helps maintain target boost
  • Improves throttle response and boost recovery between shifts
  • Distinct vent-to-atmosphere sound for a more engaging drive
  • Suitable for stock cars and remapped N20 engines including typical Stage 1 and Stage 2 tunes

Compatibility

For BMW F series with the N20 2.0 turbo petrol engine, including:

  • F20 1 Series: 125i
  • F22 and related 2 Series models listed by BMW as N20: 220i, 225i, 228i
  • F30 3 Series: 320i, 328i
  • F10 5 Series: 520i, 528i

Not suitable for B38, B48 or B58 engines.

What you will notice

  • More stable boost under load with reduced leak-by
  • Clean, crisp pressure release on lift-off with the classic turbo whoosh
  • Confidence-inspiring build that replaces a known weak OE component

Why Forge

  • Precision engineered aluminium body and piston for durability
  • Proven on road cars and tuned N20 builds
  • Trusted by enthusiasts for reliable boost control on daily driven and performance applications

Fitting and support

This unit installs in the location of the stock electronic bypass on N20 engines with no permanent modification. For professional installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Real world feedback

We have fitted this to numerous BMW N20 cars and customer satisfaction is consistently high. Owners report stronger and more consistent boost, quicker response and the reassurance of removing a common failure point.

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