Forge Replacement Atmospheric Valve for BMW N20 2.0 Turbo – Blow Off Valve / Dump Valve Upgrade
Unlock reliable boost and that addictive turbo whoosh with the Forge Atmospheric Valve for BMW N20 2.0 Turbo engines. This high quality blow off valve is a proven upgrade for the N20 platform and a direct replacement for the factory electronically controlled bypass valve that is known to fail. If you want a BMW 328i N20 blow off valve, BMW 320i dump valve, or a durable N20 diverter valve upgrade, this is the part to fit.
Why upgrade your BMW N20 valve
The OEM valve uses a rubber diaphragm that commonly splits, causing a boost leak and loss of power. You will not always get a check engine light, so you could be down on performance without knowing. The Forge valve is a fully engineered, piston based, all aluminium solution with no diaphragm to fail. It improves reliability on standard and tuned cars and is ideal for vehicles running ECU remaps in warmer climates.
- Direct replacement for the factory electronically controlled bypass valve on BMW N20 2.0 Turbo engines
- Piston based, all aluminium construction for strength and durability
- Retains OEM ECU control of valve actuation for smooth drivability
- Reduces boost leaks caused by OEM diaphragm failure
- Improves throttle response and boost holding under load
- Distinct atmospheric blow off sound for an engaging driving experience
- Suitable for stock, Stage 1 and Stage 2 remapped N20 cars
Confirmed BMW N20 fitment
F10, F20, F30 chassis with the N20 2.0 Turbo petrol engine, including:
- 125i, 225i
- 220i, 228i
- 320i, 328i
- 520i, 528i
Note: Not compatible with B38, B48 or B58 engines.
Real world results
We have used this Forge blow off valve on our own N20 projects and many customer cars with excellent results. Customers consistently report stronger and more consistent boost, sharper response and the confidence that comes from eliminating a common OEM failure point.
Who is this for
- Drivers seeking a BMW N20 diverter valve fix and reliability upgrade
- Tuned N20 owners who need a valve that holds boost under higher pressure
- Enthusiasts who want an atmospheric dump valve sound without sacrificing OEM control
Installation and fitting
This is a direct replacement atmospheric BOV for the OEM electronically controlled bypass valve on N20 engines. For professional fitting, we recommend booking with Nforcd in Warwickshire. Request a fitting quote: Sales@nforcd.com.
Search friendly terms
BMW N20 blow off valve, BMW N20 dump valve, BMW 328i N20 blow off valve, BMW 320i dump valve, Forge atmospheric valve N20, Forge dump valve kit BMW F30, N20 diverter valve upgrade, BMW F30 328i BOV, BMW F20 125i BOV, BMW F10 520i dump valve, turbo blow off valve BMW N20, fix boost leak N20, piston valve upgrade BMW 2.0 turbo.