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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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TurboSmart - Corporate Logo
T#:597194
Part#: TS-0223-1092
In Stock
10% off MSRP $ 350.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 315.99 USD
Free Shipping
10% off MSRP
$ 350.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 315.99 USD
Free Shipping
The award-winning Kompact EM series Blow-Off Valves, are the world’s first truly plug and play Blow-Off Valves. Simply unplug and unbolt your OEM Blow-Off Valve, and install Turbosmart's in its place. No adaptors, hoses, or extra assembly required. All this while retaining complete OE control of the BOV’s operation. Features: Dual Port VR9 Billet Construction in a Black Aluminum finish Compatible with BMW N55 powered E and F Chassis vehicles Dual Port design - Simultaneously vents back to the turbo inlet and the atmosphere at the same time Plug and plug upgrade Patent-pending integrated pressure control Reacts 57 times quicker than a blink of the eye Leak-free design Note: Not legal in California - Race Only For M2 and X4 M40i please refer to T#600064
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TurboSmart - Corporate Logo
T#:590437
Part#: TS-0223-1292
In Stock
10% off MSRP $ 309.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 278.99 USD
Free Shipping
10% off MSRP
$ 309.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 278.99 USD
Free Shipping
Does not fit M2 models, see T#600064 The award-winning Kompact EM series Blow-Off Valves, are the world’s first truly plug and play Blow-Off Valves. Simply unplug and unbolt your OEM Blow-Off Valve, and install Turbosmart's in its place. No adaptors, hoses, or extra assembly required. All this while retaining complete OE control of the BOV’s operation. Features: Plum Back VR9 Billet Construction in a Black Aluminum finish Compatible with BMW N55 Engine E90/E92/F Series Plum Back design Plug and plug upgrade Patent-pending integrated pressure control Reacts 57 times quicker than a blink of the eye Leak-free design Note: Not legal in California - Race Only
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Go Fast Bits - Corporate Logo
T#:558707
Part#: GFBT9357
In Stock
$ 153.99 USD
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$ 153.99 USD
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GFB’s DV+ solution couldn’t be simpler - keep what works and replace what doesn’t.

Worldwide Patent and Design Patent Pending

  • Retains the factory solenoid coil for seamless integration
  • Replaces plastic valve parts with metal for reliability and strength on chipped engines
  • Direct-fit replacement with GFB’s TMS benefits
  • Exclusive “pilot-actuated” valve mechanism for rapid response at high boost

GFB expands the DV+ range with a direct-fit solution for the weak factory diverter valve used on many European vehicles.

The solenoid coil itself from the factory-fitted valve is great (the ECU opens it faster than any pneumatic valve so why replace it?), but the weak point however is the valve mechanism itself. So GFB’s DV+ solves this problem by replacing just the valve parts with an anodised billet aluminium housing fitted with a brass piston machined to exacting tolerances.

The end result is sharper throttle response, lightning-fast valve actuation, and it will hold as much boost as you can throw at it. Read all about the DV+ story on the next page.

Other manufacturers’ products involve replacing the entire system with a traditional pneumatic valve, requiring long vacuum hose runs, additional parts for tapping into the intake manifold vacuum, plus either a different solenoid valve to actuate the pneumatic valve or a ballast resistor to plug into the OE wiring loom. All these additional items result in a product that is slower, less responsive, more expensive and takes much longer to install.

GFB’s DV+ solution on the other hand is more responsive, less expensive, easier to install, and doesn’t cause compressor surge/turbo flutter. Oh, and it doesn’t require different springs or frequent re-builds.

Many late-model European cars use ECU controlled solenoid-type diverter valves. This is a good concept because the valve can react very quickly and it only opens when it needs to.

However, there are some problems with these valves. There are typically two types of solenoid-actuated diverter valves found standard on VAG and European cars, both of which have their shortcomings.

Common OE Problem #1
The diaphragm types are commonly known to rupture, especially when boost and temperature are increased as a result of chip tuning.

Common OE Problem #2
The plastic piston-type leaks far more than most people realise (by design, not from wear), and doesn’t always close after a high-boost gear shift.

Additionally, in both cases, the solenoid on the OE diverter is directly connected to the valve mechanism, which is not ideal because neither it nor the return spring are strong enough to open and close the valve reliably at high boost.

With problems like this, you can see why other aftermarket manufacturers assume the best solution is to replace the factory diverter entirely. Unfortunately though, whilst their replacement kits might be stronger than the factory diverter, their slower response speed and lower flow do not justify the extra cost and complexity - more of a compromise than a solution.

GFB has taken a different approach to deliver a complete solution that solves existing problems and improves performance, without compromise or a hefty price tag.

The DV+ addresses the factory valve problems with a very simple and elegant solution. Keeping the factory solenoid retains all the benefits of the stock system, and replacing the valve parts with indestructable metal components ensures strength and reliability no matter how much boost you run.

That's not all. Rather than using the solenoid to directly actuate the valve, we’ve introduced a unique “pilot-actuation” system. This means the solenoid controls the air pressure that is used to open and close the piston, so it doesn't matter how much boost you push through it, the DV+ will open and close reliably without ever exceeding the solenoid’s capability.

This feature also improves on the factory system by opening the valve progressively in response to boost pressure, so it only opens as much as required to get the job done (the factory valve simply opens and shuts, it cannot partially open if boost pressure is low), resulting in better throttle response.

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Go Fast Bits - Corporate Logo
T#:381646
Part#: T9356
In Stock
$ 153.99 USD
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$ 153.99 USD
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This diverter valve differs from the stock part in that it opens based on the amount of boost pressure in addition to following ECU instructions. This improves throttle response as well as being an important supporting modification for turbo upgrades.
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TurboSmart - Corporate Logo
T#:600064
Part#: TS-0223-1094
In Stock at Vendor
10% off MSRP $ 350.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 315.99 USD
Free Shipping
10% off MSRP
$ 350.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 315.99 USD
Free Shipping
The award-winning Kompact EM series Blow-Off Valves, are the world’s first truly plug and play Blow-Off Valves. Simply unplug and unbolt your OEM Blow-Off Valve, and install Turbosmart's in its place. No adaptors, hoses, or extra assembly required. All this while retaining complete OE control of the BOV’s operation. Features: Dual Port VR11 Billet Construction in a Black Aluminum finish Dual Port design - Simultaneously vents back to the turbo inlet and the atmosphere at the same time Plug and plug upgrade Patent-pending integrated pressure control Reacts 57 times quicker than a blink of the eye Leak-free design Note: Not legal in California - Race Only
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Vargas Turbo Technologies - Corporate Logo
T#:641135
Part#: VTT-CHARGEPIPE-1
Ships in 6 Business Days
$ 103.99 USD
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$ 103.99 USD
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When upgrading and N54 we suggesting running a true BOV like a Turbosmart Raceport. This cold side charge pipe allows you to do that while getting rid of the plastic charge pipe that is prone to cracking and plastic diverter valves. Charge pipe is made from high-quality aluminum, tig welded, has two 1/8' NPT meth bungs, and a flange to fit Turbosmart Raceport or Tial BOV. Kit includes: Charge pipe 45-degree silicone adapter hose 2 1/8' NPT plugs Two T-bolt clamps
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TurboSmart - Corporate Logo
T#:590054
Part#: TS-0223-1293
In Stock
10% off MSRP $ 309.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 278.99 USD
Free Shipping
10% off MSRP
$ 309.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 278.99 USD
Free Shipping
TurboSmart - Corporate Logo
T#:637594
Part#: TS-0223-1294
Ships on Oct 28, 2026
10% off MSRP $ 309.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 278.99 USD
Free Shipping
10% off MSRP
$ 309.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 278.99 USD
Free Shipping
The VR11 suits the BMW M2 and X4 M40i with N55 engines. If you are looking for a Kompact EM unit for other N55 engined vehicles, please lookup the VR9 product. The award-winning Kompact EM series Blow-Off Valves, are the world’s first truly plug and play Blow-Off Valves. Simply unplug and unbolt your OEM Blow-Off Valve, and install ours in its place. No adapters, hoses or extra assembly required. All this while retaining complete OE control of the BOV’s operation.
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Go Fast Bits - Corporate Logo
T#:5958659
Part#: T9352
In Stock at Vendor
$ 153.90 USD
Free Shipping
$ 153.90 USD
Free Shipping

GFB Expands DV+ Range for European Vehicles

GFB is proud to introduce an extended DV+ range, offering a direct-fit solution for the factory diverter valve used in a wide range of European vehicles. This innovative product is engineered to enhance both performance and reliability.

Key Features:

  • Utilizes the factory solenoid coil for seamless integration
  • Replaces weak plastic valve components with robust metal parts, ensuring durability and strength, even on chipped engines
  • Direct-fit replacement with GFB's TMS benefits, simplifying installation
  • Features an exclusive "pilot-actuated" valve mechanism for rapid response during high boost conditions

Specifically designed for the N14 MINI Cooper S/ JCW Engine, GFB's DV+ is the ideal solution to optimize your vehicle's diverter valve.

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TurboSmart - Corporate Logo
T#:390092
Part#: 0203-1050
In Stock at Vendor
10% off MSRP $ 654.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 589.99 USD
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10% off MSRP
$ 654.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 589.99 USD
Free Shipping

In addition to the weak stock chargepipe, the factory N54 diverter valves can also be a source for boost leaks. The diverter valve takes overboost and re-directs it back through the intake and turbos instead of allowing it to pass into the intake manifold. It's the same as a blow off valve (BOV) but instead of releasing into the engine bay, it stays contained to the engine. The stock diverter valves (DV) are plastic and connect with more plastic into the chargepipe and turbo inlet pipes. The plastic can become brittle and crack even on stock engines and leak boost, which leads to a loss in power and performance.

Turbosmart has developed two kits to replace and upgrade the stock diverter valves - a direct replacement kit and a combination DV/BOV "Dual Port" kit (shown). This Dual Port Kit is a DV and a BOV together in one unit. An internal valve directs some of the charged air into the turbo inlets and the rest is dumped into the engine bay like a traditional BOV. The amount of boost released into the air is determined by an internal spring in the Dual Port unit (additional springs are also available). This allows you to custom tailor how much boost and BOV "whoosh" you hear. In addition to the DV/BOV combo, stronger silicone hose is included to connect them to the turbo inlet pipes (Vargas silicone inlets are recommended). The Turbosmart Kompact Dual Port will give you all of the strength and reliability you need to take your turbo build to the next level.

You will also need T#553932 

 

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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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N55 TurboSmart KOMPACT EM DV - Dual Port
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:7734722
Part#: N55TURBOSMARTDV
Ships in 10 Business Days
$ 338.99 USD
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$ 338.99 USD
Free Shipping
Upgrade your BMW N55's turbocharger performance with the award-winning Kompact EM series Diverter Valves from VTT. These plug-and-play valves are the world’s first, offering seamless installation without adapters or extra assembly. By retaining OE control, they ensure optimal operation while minimizing leakage and enhancing turbocharger response. Ideal for owners of hybrid or larger flowing turbos, these valves boast superior thermal performance, providing a must-have solution for maximizing boost without stressing the turbocharger.
  • Seamless plug-and-play installation
  • Minimizes leakage for enhanced turbocharger performance
  • Retains OE control for optimal operation
  • Superior thermal performance to maximize boost without stressing the turbocharger
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TurboSmart - Corporate Logo
T#:390091
Part#: 0203-1250
In Stock at Vendor
10% off MSRP $ 539.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 485.99 USD
Free Shipping
10% off MSRP
$ 539.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 485.99 USD
Free Shipping

In addition to the weak stock chargepipe, the factory N54 diverter valves can also be a source for boost leaks. The diverter valve takes overboost and re-directs it back through the intake and turbos instead of allowing it to pass into the intake manifold. It's the same as a blow off valve (BOV) but instead of releasing into the engine bay, it stays contained to the engine. The stock diverter valves (DV) are plastic and connect with more plastic into the chargepipe and turbo inlet pipes. The plastic can become brittle and crack even on stock engines and leak boost, which leads to a loss in power and performance.

Turbosmart has developed two kits to replace and upgrade the stock diverter valves - a direct replacement kit (shown) and a combination DV/BOV "Dual Port" kit. This direct replacement kit includes new high-performance DV and stronger silicone hose to connect them to the turbo inlet pipes (Vargas silicone inlets are recommended). The Turbosmart Kompact DV will give you all of the strength and reliability you need to take your turbo build to the next level.

You will also need T#553932 

 

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FTP Motorsport - Corporate Logo
T#:582198
Part#: SG71393
Special Order: No Guaranteed ETA
$ 200.00 USD
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$ 200.00 USD
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This is a set of upgraded blow off valves for the N54 engine. The recirculating design uses OE DV design to ensure proper emissions and no engine lights. Features: Quicker responding boost with higher flowing valve Increase in horsepower and torque Eliminates boost spikes and leaks Overall accelerations improvements Capable of handling a wider range of boost pressure Easy bolt-on installation Made from CNC machined T6-6061 billet aluminum alloy Fully tunable for boost capacity and response
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Vargas Black TiAL BOV Spring - BMW N54
2X Entries Into Our F80 M3 Sweepstakes
Vargas Turbo Technologies - Corporate Logo
T#:51813316
Part#: VTT-TIAL-BLACK
Ships in 10 Business Days
New Item
$ 52.99 USD
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$ 52.99 USD
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Maintain the peak performance of your forced induction system with the VTT Black TiAL BOV Spring.