New Black Grimmspeed Bypass Blow Off Valve BOV For Subaru WRX 08 - 14 G3 EJ255

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  • Regular price $539.95
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Note: Does not fit OEM TMIC. Aftermarket TMIC (Process West, Grimmspeed) required for fitment.

The long-awaited GrimmSpeed Bypass Valves have arrived, offering superior performance for your vehicle's turbo system. Here are the key details:


Repeated internal leakage at low boost levels was observed in stock bypass valves, prompting GrimmSpeed to create a more robust solution.
These bypass valves can handle double the pressure of stock units while adding a stylish touch to your engine bay.

Material and Design:

The valve body and base are CNC-machined from billet 6061 aluminum alloy, providing strength and lightweight properties.
Anodized in black or red finishes, offering an attractive appearance, corrosion resistance, and compatibility with other GrimmSpeed products.
The internal components feature a machined brass piston for anti-corrosion properties and low thermal expansion.
A 38mm diameter piston/sealing ring allows for quick pressure release, essential for high boost applications.
Steel spring is precisely-tuned, eliminating the need for tuning or adjustment, and ensuring leak-free operation.
Buna-N O-rings offer resistance to fuel and oil exposure, while single dovetail O-ring grooves provide superior retention and sealing.
Swivel air fitting simplifies installation and accommodates custom setups.
Each unit is branded with the GrimmSpeed signature badge.

Vehicle Fitment:

2008-2014 Subaru WRX (Requires aftermarket TMIC)
2008-2013 Subaru Forester XT (Requires aftermarket TMIC)
2006-2009 Subaru Liberty GT (Requires aftermarket TMIC)


CNC-machined 6061 Aluminum construction
Corrosion-resistant anodized finish in red or black
Oversized 38mm brass piston for superior flow
Precision-tuned steel spring for durability
No tuning or adjustment required
Single dovetail O-ring grooves with Buna-N O-rings for excellent oil resistance and leak-free operation
Swivel air fitting for easy installation and custom setups

Will not fit STi Models

Get control of your boost and significantly improve boost response from factory!

What you see is what you are purchasing
Please check compatibility before purchasing

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