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  • GrimmSpeed [08-14 WRX] [05-09 Legacy GT] V2 Bypass Valve - Black - JDMuscleBlow Off ValvesgrmGRM126034BLK
  • GrimmSpeed [08-14 WRX] [05-09 Legacy GT] V2 Bypass Valve - Black - JDMuscleBlow Off ValvesgrmGRM126034BLK
  • GrimmSpeed [08-14 WRX] [05-09 Legacy GT] V2 Bypass Valve - Black - JDMuscleBlow Off ValvesgrmGRM126034BLK
  • GrimmSpeed [08-14 WRX] [05-09 Legacy GT] V2 Bypass Valve - Black - JDMuscleBlow Off ValvesgrmGRM126034BLK

GrimmSpeed

GrimmSpeed

GrimmSpeed

Fits: 08-14 WRX

$27900
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GrimmSpeed GrimmSpeed
Fits: 08-14 WRX

Fitment

Please Note: Fits 2008-2014 Subaru WRX and 2005-2009 Subaru Legacy GT (grimmspeed.com: Version 2 Bypass Valve - 2008-14 Subaru WRX, 2005-09 Subaru Legacy GT, SKU GRM126034BLK). No separate Bypass Valves row exists in the Master Sheet — filed under Blow Off Valves (Turbochargers and Superchargers), the nearest match.
  • 2005-2009 Subaru | Legacy GT
  • 2008–2014 Subaru | WRX

Description

The GrimmSpeed Version 2 bypass valve in black, part GRM126034BLK, for the 2008-2014 Subaru WRX and 2005-2009 Subaru Legacy GT. CNC-machined 6061 aluminum with an oversized 38mm anodized aluminum piston for superior flow, this redesigned V2 valve eliminates the failure points of the V1 design — no more boost leaks, no tuning or adjustment required. Corrosion-resistant black anodized finish with GrimmSpeed's signature branding badge.

  • CNC-machined 6061 aluminum body with corrosion-resistant black anodized finish
  • Oversized 38mm anodized aluminum piston for superior flow and quick pressure dump
  • Redesigned internal piston eliminates V1 failure points; retuned spring for real-world operating conditions
  • Swivel air fitting for easy installation and custom setups
  • No tuning or adjustment required — plug-and-play
  • Part GRM126034BLK (grimmspeed.com-verified: Version 2 Bypass Valve - 2008-14 Subaru WRX, 2005-09 Subaru Legacy GT)

Shipping and Delivery

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Warranty and Support

For GrimmSpeed warranty information, contact our support team.

Return and Refund

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

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