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Forge Motorsport Turbo Recirc/Diverter (Dump) Valve Upgrade for BMW N20 2.0T F10 F20 F30 – Piston Bypass Valve Kit – Fix Boost Leak & Improve Spool – Fits 125i 220i 225i 228i 320i 328i 520i 528i – Direct Replacement, Remap/Stage 1-2 Ready

Forge Motorsport Turbo Recirc/Diverter (Dump) Valve Upgrade for BMW N20 2.0T F10 F20 F30 – Piston Bypass Valve Kit – Fix Boost Leak & Improve Spool – Fits 125i 220i 225i 228i 320i 328i 520i 528i – Direct Replacement, Remap/Stage 1-2 Ready

£183.15
£183.15
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Forge piston recirculation kit for BMW N20 2.0 turbo

Cure boost loss and sharpen throttle response on your N20-powered BMW with this Forge piston-operated turbo recirculation upgrade. Designed for F10, F20 and F30 platforms running the 2.0 petrol turbo, it is a robust aluminium replacement for the factory membrane-style unit on models including 125i, 220i, 225i, 228i, 320i, 328i, 520i and 528i.

Why this upgrade makes a difference

The standard rubber membrane can split which lets boost escape and costs you power. Many cars show no warning light, so you only notice softer mid-range and inconsistent boost. The Forge piston assembly removes the fragile diaphragm and gives stable boost control whether the car is stock or remapped. Expect crisper spool, repeatable performance and a reliable fix for pressure leakage.

Key advantages

  • Precision piston design with no diaphragm to tear, ideal for tuned and standard engines
  • All-aluminium body for durability under sustained turbo pressure and heat
  • Boost and vacuum referenced control that works seamlessly with factory management for smooth drivability
  • Helps eliminate common N20 boost leaks, restoring consistent torque delivery
  • Direct replacement for the original turbocharger bypass assembly, no coding required

Vehicle compatibility

BMW with the N20 2.0 turbo engine on the following F-chassis:

  • 125i
  • 220i
  • 225i
  • 228i
  • 320i
  • 328i
  • 520i
  • 528i

Proven performance

We have fitted this unit to our own N20 cars and customer vehicles. Feedback is consistently positive, with owners reporting restored boost, smoother power delivery and dependable operation compared with the stock rubber-membrane part.

Installation and support

This kit replaces the original turbo recirc assembly. Professional fitting is recommended for best results. MJ Modifications in Warwickshire can supply and install, and we are happy to quote for fitting. Email info@mjmodifications.co.uk to book.

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