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Air and Fuel› Superchargers, Turbochargers and Components

GrimmSpeed

V2 Bypass Valve

$1,374.00 $299.00 Save $1,075.00

SKU: GRM126032BLK

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The GrimmSpeed V2 Bypass Valve is a black, recirculating performance unit designed as a direct replacement for the factory bypass valve. It provides more consistent valve response and reliably handles elevated boost levels, preventing compressor surge and protecting the turbocharger. This valve vents pressure back into the intake tract, maintaining proper MAF readings and avoiding fuel trim issues.
Show original supplier description
The GrimmSpeed V2 Bypass Valve in black is engineered to replace the factory recirculating bypass valve on select Subaru models. It offers a more consistent response for venting boost pressure when the throttle closes, a crucial function for protecting the turbocharger and preventing compressor surge. The factory bypass valve can become a limitation or fail as boost pressures increase due to modifications. Constructed from CNC-machined 6061 aluminum and featuring a robust 38mm piston, this bypass valve is designed to handle elevated boost levels reliably. Its recirculating design vents boost pressure back into the intake tract, maintaining proper MAF sensor readings and avoiding the fuel trim issues associated with atmospheric blow-off valves on MAF-based fuel injection systems. This bypass valve is a direct replacement for the factory unit and includes necessary installation hardware. GrimmSpeed emphasizes in-house design, quality material sourcing, and fitment validation for their performance parts, ensuring a correct installation and reliable performance. Fitment includes the 2004-2021 Subaru STI (EJ257) and the 2002-2007 Subaru WRX (EJ20).

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGrimmSpeed
Part NumberGRM126032BLK
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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