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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
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ECS - Corporate Logo
T#:5512196
Part#: 019477LA01-01
Ships on Nov 3, 2026
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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
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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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Forge - Corporate Logo
T#:46890667
Part#: FMEDV104R
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Forge Motorsport's new E-DV (Electronic Diverter Valve) is a British-designed and manufactured solution that combines cutting-edge technology with ease of use, ensuring high quality and plug-and-play installation. This performance unit replaces the factory diverter valve, which is known to fail and can lead to boost loss or spikes, check engine lights, limp mode, and low power output. The E-DV is designed as a Recirculating Diver Valve, recirculating boosted air back to the intake system like the factory diverter valve, but with quicker and enhanced response times.
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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
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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
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Makes the wooshy wooshy noise from the turbo
Forge - Corporate Logo
T#:46890669
Part#: FMEDV110R
Ships on Oct 22, 2026
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Forge Motorsport's new E-DV (Electronic Diverter Valve) is a British-designed and manufactured solution that combines cutting-edge technology with ease of use, ensuring high quality and plug-and-play installation. This performance unit replaces the factory diverter valve, which is known to fail and can lead to boost loss or spikes, check engine lights, limp mode, and low power output. The E-DV is designed as a Recirculating Diver Valve, recirculating boosted air back to the intake system like the factory diverter valve, but with quicker and enhanced response times.
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Forge - Corporate Logo
T#:22723744
Part#: FMDVR60A-RED
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Designed with precision for BMW Mini Cooper S models equipped with N18 engines, this product is tailored to fit Cooper S vehicles from 2011 onwards and JCW Cooper S from 2013 onwards. Whether you've recently boosted your vehicle's performance through an ECU software upgrade, desire an attention-grabbing Blow off sound, or need a dependable solution to prevent common failures, this product is the perfect choice for you.

Exclusively available in a limited edition Red color option at Turner Motorsport, it's an opportunity to make a bold and distinctive statement with your Mini Cooper S.

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CTS - Corporate Logo
T#:397388
Part#: CTSBV0015
Ships in 7 Business Days
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$ 199.99 USD
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CTS Turbo is at it again with their N20 Atmospheric Blow Off Valve Kit. This BOV can be installed in one to two hours (depending on skill) using simple hand tools. Slightly shorter than even the stock valve, installation is done with the turbocharger still in place. Features: Black anodized T6061 Billet Aluminum Construction Fully compatible with OE electronics Fully servicable design with improved reliability over OE Great atmospheric BOV sound on release!
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Forge - Corporate Logo
T#:28271173
Part#: FMDV004S
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Forge - Corporate Logo
T#:46890670
Part#: FMEDV110A
Special Order: No Guaranteed ETA
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$ 341.99 USD
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This product was last offered at the strikethrough price on
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$ 341.99 USD
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Forge Motorsport's new E-DV (Electronic Diverter Valve) is a British-designed and manufactured solution that combines cutting-edge technology with ease of use, ensuring high quality and plug-and-play installation. This performance unit replaces the factory diverter valve, which is known to fail and can lead to boost loss or spikes, check engine lights, limp mode, and low power output. This particular E-DV is designed as an Atmospheric Blowoff Valve, venting boosted air to the atmosphere without causing any check engine lights or service lights.
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Forge - Corporate Logo
T#:46890666
Part#: FMEDV104A
Ships on Oct 27, 2026
Sale - Save 10% $ 379.99

This product was last offered at the strikethrough price on
09-18-2026

$ 341.99 USD
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Sale - Save 10%
$ 379.99

This product was last offered at the strikethrough price on
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$ 341.99 USD
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Forge Motorsport's new E-DV (Electronic Diverter Valve) is a British-designed and manufactured solution that combines cutting-edge technology with ease of use, ensuring high quality and plug-and-play installation. This performance unit replaces the factory diverter valve, which is known to fail and can lead to boost loss or spikes, check engine lights, limp mode, and low power output. This particular E-DV is designed as an Atmospheric Blowoff Valve, venting boosted air to the atmosphere without causing any check engine lights or service lights.
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Forge - Corporate Logo
T#:399827
Part#: FMDVN20A
Ships on Oct 22, 2026
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It is recommended for any vehicle where the boost pressure has been increased by an ECU software upgrade and for unmodified vehicles operating in warmer climates, as a solution to the many failures that have occurred, where the original rubber diaphragm splits, which causes a loss of boost pressure. Unfortunately the failure doesn’t always result in a check engine light as the valve can still be blown open by the boost pressure, so you may not be aware that you are losing power due to this.

Our alternative is a fully engineered solution offering significantly improved reliability. Our valve is piston based with no diaphragm to fail, and of all aluminium construction. It replaces the original unit with a pressure/vacuum operated piston valve that still also retains the desirable OEM ECU control over valve actuation.

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CTS - Corporate Logo
T#:23449736
Part#: CTS-BV-0016
Ships in 7 Business Days
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Upgrade your Mini's 1.6L N14 engine with the CTS Turbo Atmospheric BOV Kit, an exceptional offering by CTS Turbo. Crafted with durable T6061 billet aluminum construction, this kit ensures reliability and longevity.

The Atmospheric BOV Kit seamlessly integrates with factory electronics, eliminating check engine lights and replacing the prone-to-failure factory plastic unit. Its piston design guarantees longevity, easy installation, serviceability, impressive sound, and great value. With a compact build slightly shorter than the stock unit, it fits snugly into the tight N14 engine bay.

Installation is hassle-free, taking only 30-60 minutes, depending on the installer's expertise.

Product Features:

  • T6061 billet aluminum construction for durability
  • Black anodized stealth finish for sleek appearance
  • Fully compatible with OE electronics, ensuring no check engine lights
  • Serviceable piston design for ease of maintenance
  • Substantial reliability improvement over the factory unit
  • Compact design fits into tight spaces effortlessly
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Forge - Corporate Logo
T#:399574
Part#: FMDVF22A
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The stock valve on the N55 is prone to failure - the plastic often cracks, causing the valve to stop functioning altogether. 

This Forge valve unit is engineered with a piston, eliminating the diaphragm entirely. Additionally, the Valve is all aluminum - this is the solution to any failures associated with the OEM valve, making your N55 significantly more reliable. This unit retains the OEM ECU controlled valve actuation as well. Includes a plug and play harness that works with the OEM harness.

Turner Motorsport advises being cautious when removing the OEM recirculating valve; if the plastic is cracked, pieces could fall into the turbo upon removal causing serious damage.

This product fits the following BMWs:
2014+ F22 M235i M235iX
 

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Forge - Corporate Logo
T#:399575
Part#: FMDVF22R
Ships on Oct 22, 2026
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The stock valve on the N55 is prone to failure - the plastic often cracks, causing the valve to stop functioning altogether. 

This Forge valve unit is engineered with a piston, eliminating the diaphragm entirely. Additionally, the Valve is all aluminum - this is the solution to any failures associated with the OEM valve, making your N55 significantly more reliable. This unit retains the OEM ECU controlled valve actuation as well. Includes a plug and play harness that works with the OEM harness.

Turner Motorsport advises being cautious when removing the OEM recirculating valve; if the plastic is cracked, pieces could fall into the turbo upon removal causing serious damage.

This product fits the following BMWs:
2014+ F22 M235i M235iX
 

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Forge - Corporate Logo
T#:377213
Part#: FMBM335DV1
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This alloy hard pipe fits to the throttle body and incorporates our high flow Blow off valve. This new valve fresh from our R&D department is the largest displacement valve that Forge have ever made ! Featuring a 50mm (2”) aluminium piston so that there are no issues with split diaphragms, we have not found the power handling limits of this valve yet ! The piston uses heat stabilised viton o-rings and high temperature Mobil 1 grease to ensure a long life with minimal wear and very long service intervals.

All parts are included in the kit, for your installation, along with comprehensive instructions.

This product fits the following BMWs:
2008 - 2013 E82 135i 
2007 - 2013 E9x 335i


 
 

 

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Forge - Corporate Logo
T#:30960453
Part#: FMDVSKMINI
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Forge - Corporate Logo
T#:384540
Part#: FMDVN20R
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This Blow Off, or Dump valve, is for the BMW N20 2.0 Turbo engines that have the electronically controlled bypass valve. It is recommended for any vehicle where the boost pressure has been increased by an ECU software upgrade and for unmodified vehicles operating in warmer climates, as a solution to the many failures that have occurred, where the original rubber diaphragm splits, which causes a loss of boost pressure. Unfortunately the failure doesn’t always result in a check engine light as the valve can still be blown open by the boost pressure, so you may not be aware that you are losing power due to this.

Our alternative is a fully engineered solution offering significantly improved reliability. Our valve is piston based with no diaphragm to fail, and of all aluminium construction. It replaces the original unit with a pressure/vacuum operated piston valve that still also retains the desirable OEM ECU control over valve actuation.

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Forge - Corporate Logo
T#:8517480
Part#: FMTVTUN
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Optimize your BMW's performance by adjusting your diverter or blow-off valve using this kit containing four springs with varying strengths. When noticing excessive pressure release or a drop in boost pressure, it's an indicator that a stronger spring might be necessary.

Important Notes:

  • Fitting a stronger spring won't increase boost pressure unless there's a pressure loss.
  • Installing an excessively strong spring may damage the turbocharger if it restricts the valve's operation.

Valve Spring Color Coding:

  • Green: Suitable for 5-15 PSI
  • Yellow: Ideal for 15-23 PSI
  • Blue: Designed for 23-30 PSI
  • Red: Suitable for 30+ PSI
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Forge - Corporate Logo
T#:22756686
Part#: FMDVR60A
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Mini Cooper S Blow Off Valve Kit

Designed specifically for the BMW Mini Cooper S fitted with the N18 engines, these are Cooper S 2011 onwards and JCW Cooper S 2013 onwards. This product is either recommended where the boost pressure has been increased by an ECU software upgrade or simply for those wanting a loud Blow off sound or simply as a solution to the many failures that have occurred.

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Genuine BMW - Corporate Logo
T#:28871
Part#: 07129905261
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MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 3.68 USD
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Genuine BMW Torx-Countersunk Head Screw -
This item fits the following BMW Chassis:
E71,E82,E90,E92,E93,F06,F10,F12,F13,F15,F16,F22,F25 X3,F26 X4,F30,F32,F33,F34,F36

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Viton® Fluoroelastomer O-Ring 2.5 Mm Wide, 40 Mm ID
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:8184970
Part#: 1295N464
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Forge - Corporate Logo
T#:30960454
Part#: FMDVMCS
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Forge - Corporate Logo
T#:46924957
Part#: FMEDV102A
Special Order: No Guaranteed ETA
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Forge - Corporate Logo
T#:31390565
Part#: FM207V
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MINI R55 to R59 Upgraded Diverter Valve is designed for Peugeot/BMW MINI 1.6 Turbo engines, found in Peugeot 207/307/308 GT Turbo and BMW MINI Cooper S Turbo R56/57 models. This valve is ideal for vehicles with increased boost pressure from an ECU software upgrade and for unmodified vehicles in warmer climates, providing a solution to common failures. Key features include:

  • Suitable for Peugeot/BMW MINI 1.6 Turbo engines
  • Perfect for vehicles with increased boost pressure
  • Reliable performance in warmer climates
  • Reduces the risk of common bypass valve failures
  • Enhances engine efficiency and reliability
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Forge - Corporate Logo
T#:384401
Part#: FMDV-SHIM
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These shims allow you to manually adjust preload on Forge N54 Diverter Valves.
Forge - Corporate Logo
T#:587909
Part#: FMDVR56A
Ships on Oct 22, 2026
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Optimized for BMW Mini Cooper S N14 Engines

Designed with precision, this product is tailor-made for BMW Mini Cooper S vehicles featuring N14 engines, focusing on Gen 2 Cooper S (2007-2010) and JCW (2009-2012) editions equipped with electronically controlled bypass valves.

Key Features:

  • Specifically crafted for N14 engine-equipped BMW Mini Cooper S models.
  • Caters to Gen 2 Cooper S (2007-2010) and JCW (2009-2012) variants.
  • Ideal for vehicles with boosted pressure due to ECU software upgrades.
  • Recommended for unmodified vehicles in warmer climates.
  • A reliable solution to prevent common failures.
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Forge - Corporate Logo
T#:377212
Part#: FMBM335DV2
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This alloy hard pipe fits to the throttle body and incorporates dual high flow Blow off valves. These new valves, fresh from our R&D department are the largest displacement valves that Forge have ever made ! Featuring a 50mm (2”) aluminium pistons so that there are no issues with split diaphragms, we have not found the power handling limits of these valves yet ! The pistons uses heat stabilised viton o-rings and high temperature Mobil 1 grease to ensure a long life with minimal wear and very long service intervals.

All parts are included in the kit, for your installation, along with comprehensive instructions.

This product fits the following BMWs:
2008 - 2013 E82 135i 
2007 - 2013 E9x 335i

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Enthusiast Bundles - Corporate Logo
T#:37419778
Part#: 054380LA01EBKT
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Refresh and upgrade your front intercooler to ensure you are supplying your engine with the maximum amount of airflow. With the added charge pipe and BOV kit you can drive confidently knowing the plastic charge pipe is replaced with a much stronger metal alternative with added blow off valve for a full performance and sound upgrade!

OEM+ Upgraded Front Mount Intercooler:

Upgrade your N54/N55 performance effortlessly with this "OEM+" Intercooler from ECS Tuning! This premium intercooler is engineered to deliver superior cooling efficiency and increased horsepower without the hassle of extensive bumper/core support modifications.

Key Features:

Enhanced Core Depth: Featuring a robust aluminum bar and plate core, this intercooler ensures optimal heat dissipation for peak performance.
Durable Construction: TIG-welded cast aluminum end tanks provide unmatched durability, replacing the factory's plastic components.
Perfect Fitment: Designed to fit just like the OEM unit, it requires no additional brackets or modifications to the bumper or core support.
Compatibility: Works seamlessly with OE charge pipes and pipe connectors for easy installation.
Benefits:

Improved Cooling Efficiency: Significantly lowers intercooler outlet temperatures, ensuring your engine runs cooler and more efficiently.
Increased Durability: Aluminum end tanks offer enhanced durability and longevity compared to factory plastic construction.
Hassle-Free Installation: No need for trimming the front bumper or modifying the radiator support, making installation straightforward.
Whether you're after increased performance or an OEM purist, the ECS Tuning OEM+ Intercooler is the perfect upgrade for your BMW. Enjoy the benefits of increased horsepower and lower temperatures with an easy, hassle-free installation.

N54 Chargepipe and BOV Kit:

All of the tuning in the world is only as good as the weakest link. More boost in your 135/335 is great! But you will soon learn that some of the factory hardware is not up to the task of handling that extra pressure. One of the first things to fail and cause a boost leak are the factory boost diverter valves. This allows boost to "leak" out of the intake stream and a loss of power from the engine. This ECS Tuning chargepipe upgrade includes a blow-off valve in place of the factory diverter valves. The BOV is higher quality than the diverter valves and will exit intake air to the outside instead of putting it back through the turbo system (which will reduce strain on the turbos). This aluminum chargepipe is also much more robust than the stock plastic factory pipe and the connection to the throttle body is stronger, eliminating another failure point of the stock pipe.

Built-in 1/8" NPT ports allow you to run an additional methanol injection kit (bungs included if you don't want use the ports).

This is a complete kit that includes everything you need to replace the factory chargepipe and diverter valves -

powedercoat chargepipe
ECS Tuning blow-off valve
multiple BOV springs to suit your vacuum/boost needs
vacuum plugs for the stock diverter valve hoses
silicone hose connection to intercooler piping
all hardware and hose clamps with instructions

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Forge - Corporate Logo
T#:46890679
Part#: FMEDV107A
Special Order: No Guaranteed ETA
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This product was last offered at the strikethrough price on
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$ 379.99

This product was last offered at the strikethrough price on
09-18-2026

$ 341.99 USD
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Electronically actuated diverter valve