Cobb 06-07 Mazdaspeed6 / 07-13 Mazdaspeed3 / 08-14 Subaru WRX / 09-13 FXT / 05-09 OBXT/LGT LF Bypass Valve (cobb724665)

Regular price $350.00 USD $350.00 USD Sale

Ready To Ship! Special Order! Ships in 6+ weeks

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Part # cobb724665

If you want to enhance the cooling capacity of your 2011–2014 WRX or STI but you already have a pipe or you need to have custom piping installed, this is the core-only option for you. A by-pass valve with the COBB LF BPV's small size and light weight can withstand very high boost pressure without leaking. With its new design, the control volume is 30% lower, allowing for incredibly quick boost venting when activated. Innovative engineering and careful manufacturing combine to create a small package that can fit into a small engine bay. The LF BPV's moving parts have less inertia and may react more quickly than heavier components in conventional bypass valves because of the components' low weight. This redesigned design makes use of a vacuum port with a Banjo fitting that allows for 360-degree hose routing adjustment. Compared to NPT ports, this results in a simpler installation process and fewer potential leak spots. Additionally, the piston o-ring seal in the new design has an expanded diameter that allows for greater seal compression and less wear. The improved spring and seal design, which offers a 60% increase in clamping force at peak boost while preserving similar behavior at idle and transient loads, eliminates the need for adjustment of the spring seat.


    50 State Legal.
    This part is legal for sale and uses on Emissions Controlled Vehicles in all 50 states when used in accordance with the manufacturer's application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number:


  • Subaru WRX (2008, 2009, 2010, 2011, 2012, 2013, 2014)
  • Subaru FXT (2009, 2010, 2011, 2012, 2013)
  • Subaru OBXT/LGT (2005, 2006, 2007, 2008, 2009)
  • Mazdaspeed3 (2007, 2008, 2009, 2010, 2011, 2012, 2013)
  • Mazdaspeed6 (2006, 2007)


  • Compact
  • Lightweight bypass valve
  • loaded with features and reliably holds high levels of boost without leaks.
  • 100% COBB product

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In stock, non special order items can be returned within 30 days of the product arriving to your house or place of work.
Returns will NOT be accepted on Clearance Items, Final Sales, Special Orders, Opened, Installed, Incomplete, or Otherwise Used Products. In order to initiate a return, an RMA number must be requested and approved via e-mail.
All returns will be subject to a 20% restocking fee minus complete shipping cost (roundtrip).

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For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.

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Kami Speed serves the right to ship using an alternative method if we see it fit, in order to expedite shipping and reduce your rate depending on product value.