Forge Replacement Atmospheric Valve for BMW N20 2.0 Turbo – 228i, 320i, 328i, 520i, 528i, 125i, 220i, 225i (F10, F20, F30)
Upgrade your BMW N20 2.0 Turbo with the Forge Replacement Atmospheric Valve. Also known as a blow off valve, dump valve, or diverter valve upgrade, this precision all aluminium, piston-based solution is engineered to replace the failure-prone OEM electronically controlled bypass valve on N20-powered BMWs. It delivers sharper throttle response, consistent boost, and that sought-after atmospheric whoosh, while retaining desirable OEM ECU control over valve actuation.
Why upgrade the N20 valve
The factory rubber diaphragm is known to split, especially on tuned cars running higher boost or in warmer climates. This can cause boost leaks and power loss that may not trigger a check engine light, leaving performance on the table. The Forge atmospheric valve eliminates the diaphragm entirely with a robust piston design for significantly improved reliability and repeatable performance on both stock and remapped N20 engines.
- Direct replacement for the OEM electronically controlled bypass valve on BMW N20 2.0 Turbo engines
- Piston-based, all aluminium construction with no diaphragm to fail
- Retains OEM ECU control of valve actuation for seamless integration
- Ideal for tuned cars with higher boost and for reliability on standard cars
- Prevents power loss from boost leaks caused by OEM diaphragm failures
- Distinctive atmospheric blow off sound
Confirmed fitment
Fits BMW models with the N20 2.0 Turbo engine and electronically controlled bypass valve in the following F-series chassis:
- F10: 520i, 528i
- F20: 125i
- F2x: 220i, 225i, 228i
- F30: 320i, 328i
Note: This valve does not fit B38, B48, or B58 engines.
Real-world results from Nforcd
We have installed this Forge atmospheric valve on multiple customer BMW N20 cars and it has been consistently reliable, eliminating boost leak issues and restoring lost performance. Customers love the improved response and the authentic turbo sound.
Professional fitting
Want expert installation? Book fitting with Nforcd in Warwickshire. Email Sales@nforcd.com for a quote and availability.
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