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Blow Off Valves & Diverter Valves

Adding a blow off valve or upgrading your diverter valves can change the sound of your vehicle and be an asset in big power setups.
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ECS Atmospheric Diverter Valve Spacer - N55
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:5512196
Part#: 019477LA01-01
Ships on Nov 3, 2026
Sale - Save 25% $ 90.99

This product was last offered at the strikethrough price on
06-14-2026

$ 68.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 90.99

This product was last offered at the strikethrough price on
06-14-2026

$ 68.24 USD
Free Shipping on orders $49 and up
Let your turbo blow off some air for an exhilarating driving experience!
ECS Atmospheric Diverter Valve Spacer - Black Anodized
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:6304593
Part#: 019463LA01-01
In Stock
Sale - Save 25% $ 90.99

This product was last offered at the strikethrough price on
06-14-2026

$ 68.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 90.99

This product was last offered at the strikethrough price on
06-14-2026

$ 68.24 USD
Free Shipping on orders $49 and up

Bring out the sound of your turbo with the ECS Atmospheric Diverter Valve Spacer! The ECS DV Spacer gives your N20 the sound of a blow off valve (BOV) with every gear change and every boosted throttle close! The strategically engineered vent slots allow you to boost on without a CEL (Check Engine Light).

FEATURES:

Anodized Black 6061-T6 aluminum

Features 3 radial slots to let out the “woosh” with optimal flow for all OEM DV types

Engineered to operate CEL-FREE!

Alignment holes for ease of installation

Includes pre-installed, captured Viton O-rings, resistant to chemical degradation

Includes Zinc-plated alloy steel socket head cap screws

Tested for performance and durability

INSTALLATION:

Remove Diverter Valve
Place the spacer onto the DV flange r
Re-install your original DV solenoid atop the spacer with the included longer hardware.
The wastegate actuator must be swung out of the way for install. Loosen both screws retaining the wastegate actuator, then remove the one closest to the actuator, allowing the actuator to swing out of the way. This will allow for ease of installation.

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MINI Atmospheric Diverter Valve Spacer - Red Anodized
10X Entries Into Our F80 M3 Sweepstakes
Requires older design 11657593273 electric valve with gasket.
ECS - Corporate Logo
T#:6924299
Part#: 019449LA01-03
In Stock
Sale - Save 25% $ 89.99

This product was last offered at the strikethrough price on
06-14-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 89.99

This product was last offered at the strikethrough price on
06-14-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Makes the wooshy wooshy noise from the turbo

MINI Atmospheric Diverter Valve Spacer - Black Anodized
10X Entries Into Our F80 M3 Sweepstakes
Requires older design 11657593273 electric valve with gasket.
ECS - Corporate Logo
T#:5512198
Part#: 019449LA01-01
In Stock
Sale - Save 25% $ 89.99

This product was last offered at the strikethrough price on
06-14-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 89.99

This product was last offered at the strikethrough price on
06-14-2026

$ 67.49 USD
Free Shipping on orders $49 and up
Makes the wooshy wooshy noise from the turbo

Active Autowerke - Corporate Logo
T#:4416
Part#: AABOVKIT-N54
In Stock
$ 565.99

This product was last offered at the strikethrough price on
09-01-2026

$ 529.99 USD
Limited Qty Sale
Free Shipping
$ 565.99

This product was last offered at the strikethrough price on
09-01-2026

$ 529.99 USD
Limited Qty Sale
Free Shipping
As Used on Project E92 335i
When adding boost to the N54 engine, it's important to consider effects throughout the rest of the system. Additional boost can overwhelm the stock BMW diverter valve system and lead to boost leakage, or boost spikes, and lost horsepower. With the factory components in place it's hard to maintain consistently high boost levels. Instead of the weak plastic components of the stock system, Active Autowerke uses a CNC-machined and mandrel-bent aluminum tube with a Venturi blow-off valve in place of the original diverter valves. The blow-off valve dumps overboost into the atmosphere for that distinctive turbo 'whoosh' sound. The single AA BOV is over-sized for the N54 application - taking the place of the two small diverter valves, and verified to handle over 600hp. With the BOV acting properly your turbos and other components are protected from compressor surge caused by excess pressure build-up.

We like the Active BOV better than other forms of diverter and BOV kits because it's tried and true - AA was the original turbo BMW tuners and their experience is second to none. That's why they took the time to engineer their kit to fit perfectly, using the OE-type connector to the throttle body, and high-strength silicone to the lower intercooler tube. Each connection is a tight, leak-free seal. The kit comes complete with the discharge tube, vacuum plugs for the stock hoses, and instructions. The tube is powdercoated in black and with a wrinkle finish for an OE appearance.

This item fits the following BMWs with N54 engine:
2008-2010 E82 BMW 135i 1M
2007-2010 E90 BMW 335i 335xi 335i xDrive
2007-2010 E92 BMW 335i 335is 335xi 335i xDrive
2007-2010 E93 BMW 335i
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