Cobb LF Bypass Valve Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT 2006-2008 | 712665 vendor_Fumoto This restrictor installs inline (arrows

This restrictor installs inline (arrows facing up) on the turbo sump vent hose that runs from the turbo sump to the front engine cover

This valve requires a vehicle specific mounting flange

some customers choose not to have this sometimes obtrusive noise constantly being drawn into their car

Part #: SPF1617-19K

K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration

Cobb LF Bypass Valve Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT 2006-2008 | 712665 vendor_Fumoto This restrictor installs inline (arrowsFitment Information: 2006 2007 Subaru WRX 2004 2021 Subaru STI 2006 2008 Subaru Forester XT The COBB LF BPV is a compact and lightweight by pass valve that is capable of holding very high boost pressure without leaking. Features: Extremely Fast Venting of Boost when Actuated Low Weight Created Less Inertia and Improved Response Times BanjoFitting Provides 360 Degree Adjustability of Hose Routing Piston O Ring Seal 2x the Diameter Allows More Seal