• COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665
  • COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665
  • COBB [02 - 07 WRX, 04 - 21 STI, 06 - 08 FXT] LF Bypass Valve | 712665 - JDMuscleBlow Off Valvescobb712665

COBB Tuning

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LF Bypass Valve

Fits: 02-07 WRX, 04-21 STI, 06-08 FXT

$37500
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Pay over time available · Est. $11.72/payment
ⓘ

Illustrative estimate only, not a financing quote or guaranteed offer. Actual payments, frequency and terms vary by provider and eligibility. Taxes, shipping and add-ons are excluded.

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COBB Tuning LF Bypass Valve
Fits: 02-07 WRX, 04-21 STI, 06-08 FXT
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Fitment

Please Note: COBB confirmed applications include 2002-2007 Impreza WRX, 2004-2014 Impreza STI, 2015-2021 WRX STI sedan with manual transmission (including 2018 Type RA and 2019 S209), and 2006-2008 Forester XT. The product is 50-State Legal under CARB Executive Orders D-660-9, D-660-36, and D-660-83. Verify exact market, body style, and transmission requirements in the manufacturer application guide before ordering.
  • 2006-2008 Subaru | Forester XT
  • 2002–2007 Subaru | WRX
  • 2004–2021 Subaru | WRX STI

Description

The Cobb Tuning LF Bypass Valve is a compact, lightweight, CARB-certified valve engineered to hold high boost pressure without leaking while responding quickly in demanding Subaru applications.

  • 30% reduced control volume for fast boost venting when actuated
  • Lightweight moving parts reduce inertia and improve response compared with heavier bypass valves
  • Banjo-fitting vacuum port provides 360° hose-routing adjustability with fewer potential leak points than NPT ports
  • Piston O-ring seal is twice the diameter of the previous design for greater compression and reduced wear
  • Updated spring and seal design increases clamping force at peak boost by 60% without spring-seat adjustment while maintaining similar idle and transient operation
  • 50-State Legal with CARB Executive Orders D-660-9, D-660-36, and D-660-83
  • Confirmed applications: 2002-2007 WRX, 2004-2021 STI, and 2006-2008 Forester XT; verify exact market, body style, and transmission requirements before ordering
  • Warranty: Cobb MFG Warranty
  • References: https://www.cobbtuning.com/products/turbo/subaru-lf-bpv-wrx-2002-2007-sti-2004-2021-fxt-2006-2008
  • Featured video: https://www.youtube.com/watch?v=2d8taoI3KGU

Shipping and Delivery

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Warranty and Support

For COBB Tuning 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.

Proposition 65

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov