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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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Forge - Corporate Logo
T#:8517480
Part#: FMTVTUN
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Sale - Save 12% $ 34.99

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

$ 30.95 USD
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$ 34.99

This product was last offered at the strikethrough price on
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$ 30.95 USD
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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
In Stock
Sale - Save 10% $ 372.99

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

$ 335.03 USD
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Sale - Save 10%
$ 372.99

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

$ 335.03 USD
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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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Forge - Corporate Logo
T#:30960454
Part#: FMDVMCS
Ships in 7 Business Days
Sale - Save 10% $ 130.99

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

$ 117.45 USD
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Sale - Save 10%
$ 130.99

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

$ 117.45 USD
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Forge - Corporate Logo
T#:46924957
Part#: FMEDV102A
Special Order: No Guaranteed ETA
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
09-18-2026

$ 341.99 USD
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TurboSmart - Corporate Logo
T#:598852
Part#: TS-0203-1103
In Stock at Vendor
10% off MSRP $ 49.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
10% off MSRP
$ 49.99

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

$ 44.99 USD
Free Shipping on orders $49 and up
Forge - Corporate Logo
T#:31390565
Part#: FM207V
Ships on Oct 23, 2026
Sale - Save 10% $ 313.99

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

$ 281.88 USD
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$ 313.99

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

$ 281.88 USD
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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
Ships on Oct 23, 2026
Sale - Save 10% $ 4.00

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

$ 3.60 USD
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$ 4.00

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

$ 3.60 USD
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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 23, 2026
Sale - Save 10% $ 372.99

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

$ 335.03 USD
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Sale - Save 10%
$ 372.99

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

$ 335.03 USD
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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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Burger Motorsports - Corporate Logo
T#:589530
Part#: N54BOVVACADPT
Ships on Oct 20, 2026
$ 59.00 USD
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Forge - Corporate Logo
T#:377212
Part#: FMBM335DV2
Ships on Oct 23, 2026
Sale - Save 10% $ 860.99

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

$ 774.25 USD
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$ 860.99

This product was last offered at the strikethrough price on
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$ 774.25 USD
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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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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 on Oct 19, 2026
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.
Enthusiast Bundles - Corporate Logo
T#:37419778
Part#: 054380LA01EBKT
Ships on Jan 29, 2027
Sale - Save 20% $ 1,000.98

This product was last offered at the strikethrough price on
05-05-2026

$ 799.00 USD
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$ 1,000.98

This product was last offered at the strikethrough price on
05-05-2026

$ 799.00 USD
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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
Sale - Save 10% $ 379.99

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

$ 341.99 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 379.99

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

$ 341.99 USD
Free Shipping on orders $49 and up
Electronically actuated diverter valve