COBB Tuning LF Bypass Valve - 2015-2021 Subaru WRX / 2014-2018 Forester PDM_fog-lights Forged from 4130 Chromoly steel

Forged from 4130 Chromoly steel for improved grain structure and strength

Application: seals 3-inch downpipe to cat-back (double thickness for larger gaps)

Year Make Model Submodel 2004-2007 Subaru STI All 2002-2007 Subaru WRX All

000 RPMs in 333 milliseconds

COBB Tuning LF Bypass Valve - 2015-2021 Subaru WRX / 2014-2018 Forester PDM_fog-lights Forged from 4130 Chromoly steelCobb LF Bypass Valve 2015 2021 Subaru WRX 2014 2018 Forester XT The Cobb LF Bypass Valve for 2015 2021 Subaru WRX is a recirculating bypass valve that replaces the factory bypass valve to manage compressor side pressure during throttle off events. The Low Force spring specification is calibrated for the boost pressure range of Cobb Accessport tuned builds, providing reliable compressor surge protection without premature venting that can affect air