COBB Tuning LF Bypass Valve

2015-2021 Subaru WRX 2014-2018 Forester XT

Ships for free in the 48 states

SKU: 745670

Out of Stock

The LF Bypass Valve will hold more boost without the risk of leaking to fit the Subaru WRX and Forester XT. 


COBB Tuning LF Bypass Valve


  • 100% Billet aluminum construction
  • 100% O-ring sealing
  • 100% Rebuildable if there ever is an o-ring failure
  • The compact design makes it ideal to fit in the confines of a light engine bay
  • The updated design uses a banjo-fitting vacuum port which provides 360-degree adjustability of hose routing
  • Includes vacuum line


COBB Tuning LF Bypass Valve

The COBB Tuning LF Bypass Valve is capable of holding very high boost pressures. This is an updated design that reduces the control volume by 30% allowing for extremely fast venting of boost pressure without the risk of leaking. If you have bolt-ons that increase the boost or horsepower, you could surpass the limits of the factory bypass valve which could leak boost and handicap your power potential. The COBB Tuning unit is super durable, with strong internal construction. 

The LF Bypass Valve is a direct replacement for the factory bypass valve and has an OEM-like flange for a simple installation. 


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