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Forge Motorsport Atmospheric Blow Off Valve (BOV) Upgrade - Direct Replacement for BMW N20 2.0 Turbo (F10 F20 F30): 228i, 320i, 328i, 520i, 528i, 125i, 220i, 225i - Piston Diverter/Dump Valve

Forge Motorsport Atmospheric Blow Off Valve (BOV) Upgrade - Direct Replacement for BMW N20 2.0 Turbo (F10 F20 F30): 228i, 320i, 328i, 520i, 528i, 125i, 220i, 225i - Piston Diverter/Dump Valve

£215.49
£215.49
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

High-Flow Vent-to-Atmosphere Valve Upgrade for BMW N20 2.0T - F10 F20 F30

Unleash sharper response, stronger boost retention and that addictive turbo whoosh with this precision-engineered Forge piston valve for BMW’s four-cylinder N20 turbo petrol engine. It is a direct swap for the factory electronic unit on your F-Series BMW and uses the original control signal for seamless operation. Built from billet aluminium and designed around a serviceable piston, it removes the fragile diaphragm found in the standard assembly to deliver consistent performance on stock cars and mapped setups alike.

What you’ll feel

  • Faster throttle pick-up and cleaner gear changes under load
  • Rock-solid boost holding that helps prevent power bleed
  • Distinct turbo vent sound on lift-off without ECU trickery
  • Confidence-inspiring reliability when driven hard or tuned

Why upgrade from the OE unit

  • Piston-operated design with no rubber diaphragm to split
  • Alloy construction for durability and heat resistance
  • Direct-fit on the turbocharger housing using the factory electrical connection
  • Ideal for remapped N20 engines running increased charge pressure

Compatibility - BMW N20 2.0 turbo petrol

  • F10 5 Series - 520i, 528i
  • F20 1 Series - 125i
  • F2x 2 Series - 220i, 225i, 228i
  • F30 3 Series - 320i, 328i

Not suitable for later B-series engines including B38, B48 and B58.

Proven by MJ Modifications

We run this valve on our own builds and have fitted it to many customer cars. Feedback is consistently positive - stronger mid-range punch, cleaner boost control and the satisfying vent-to-air soundtrack enthusiasts expect from a quality upgrade.

Professional fitting available

Want it installed properly first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quotation and availability.

Search terms customers use

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