Cobb LF Bypass Valve | Multiple Fitments (724665)
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Subaru/Mitsubishi LF Bypass Valve by Cobb Tuning
The COBB LF BPV is a compact and lightweight by-pass valve that is capable of holding very high boost pressure without leaking. Its updated design reduces control volume by 30% allowing for extremely fast venting of boost when actuated. Innovative engineering and precision manufacturing result in a compact package able to fit in the confines of a tight engine bay.
Due to the low weight of the components, the moving parts in the LF BPV have less inertia and can respond faster than heavier components in other bypass valves. This updated design uses a Banjo-fitting vacuum port which provides 360 degree adjustability of hose routing. This results in a simpler install and less potential leak points than the NPT ports.
This new design also includes a piston o-ring seal that is twice the diameter of the old design allowing more seal compression and reduced wear. Adjustability of the spring seat is no longer needed due to the updated spring and seal design which provides a 60% increase in clamping force at peak boost while maintaining similar operation at idle and transient loads.
Features
- Capable of holding very high boost pressure without leaking.
- Reduces control volume by 30% allowing for extremely fast venting
- Compact package able to fit in the confines of a tight engine bay.
- Moving parts in the LF BPV have less inertia and can respond faster than heavier components in other bypass valves
- Uses a Banjo-fitting vacuum port which provides 360 degree adjustability of hose routing
- Includes a piston o-ring seal that is twice the diameter of the old design allowing more seal compression and reduced wear
- Spring & seal design increase clamping force by 60% at peak boost while maintaining similar operation at idle and transient loads
Applications
- 2008 - 2014 Subaru Impreza WRX
- 2009 - 2013 Subaru Forester XT
- 2005 - 2009 Subaru Legacy GT
- 2005 - 2009 Subaru Outback XT
- 2007 - 2013 Mazda Mazdaspeed3
- 2006 - 2007 Mazda Mazdaspeed6
What's In The Box?
- 1 - Cobb LF BPV
- 1 - Hose
- 1 - Gasket
References
Warranty
- COBB Tuning Products, LLC warrants to the original retail purchaser that all components manufactured by COBB Tuning, or sold under the COBB brand from an Authorized COBB Tuning dealer, hold a 12-month limited warranty from the date of purchase against defects in materials and workmanship.
Customer Reviews
This is a high-quality, completely rebuildable, more efficient and reliable alternative to the inferior OEM part. Sound of the blow-off is much smoother than stock, but far more audible, especially so if you're using an aftermarket intake.
Like the Title say this bypass valve has some real heft to it. It built well and hold pressure as intended. You should definitely use this if reliability is what you're after.
