COBB Tuning XLF BPV Bypass Valve Subaru WRX/STI (GDA/GDB/GRB/GVB/VA) Forester XT (SG/SH)

COBB Tuning XLF BPV Bypass Valve - Subaru WRX/STI (GDA/GDB/GRB/GVB/VA) Forester XT (SG/SH)

COBB Tuning's XLF BPV is a complete 2019 redesign of their proven bypass valve, built to address the shortcomings of older OEM-style and aftermarket units. Purpose-engineered for boosted Subaru platforms, it delivers a more reliable seal, greater clamping force at peak boost, and a simpler, more serviceable design than ever before.

This listing covers the COBB XLF BPV bypass valve for the Subaru WRX and STI across the GDA, GDB, GRB, GVB, and VA chassis (2001–2018), as well as the Forester XT on the SG and SH platforms (2006–2008).

Key Features

• Redesigned piston o-ring seal with twice the diameter of the older XLE design — greater compression and reduced wear over time
• Serviceable and rebuildable design — o-ring can be replaced in the unlikely event of failure
• 60% increase in clamping force at peak boost compared to the previous design
• No spring seat adjustment required — updated spring and seal geometry maintains correct operation at idle and under transient loads
• Direct bolt-on fitment for compatible Subaru turbo applications

Vehicle compatibility, OEM part numbers, and fitment notes are provided in the tabs above. Please ensure your vehicle's year, trim level, and configuration are confirmed before ordering.

Not sure if this suits your build? Contact our team at sales@chicaneaustralia.com.au for expert advice.