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Regular Price: $221.00 - Instant discount: $22.10 = $198.90
Compatible Applications
Subaru Impreza GT (1998–2000) – EJ205
Subaru WRX (1999–2000)
Subaru STI (1999–2000)
Subaru Legacy B4 Twin Turbo (1998–2003)
Subaru Forester GT/XT (2001–2004, Series I)
The GFB Mach 2 TMS Recirculating Diverter Valve is a high-performance, direct-fit replacement for factory bypass or diverter valves. Designed with GFB’s Turbo Management System (TMS) technology, this valve improves boost response, throttle feel, and reliability—all while keeping your engine bay quiet and emissions-friendly thanks to its 100% recirculating design.
Ideal for turbocharged vehicles running factory-style recirculating setups, the Mach 2 is the smart upgrade for performance without the “whoosh.”
100% Recirculating Design – Keeps intake and emissions systems MAF- and emissions-friendly
Faster Boost Recovery – Up to 30% quicker return to peak boost after shifting or throttle lift
Pressure-Balanced Internals – Holds unlimited boost without premature opening or leakage
Direct Bolt-On Fitment – Replaces OEM diverter/bypass valves on supported vehicles
OEM-Look, Stealth Performance – Ideal for drivers who want more power without more noise
Enhanced Turbo Response – Reduces lag and builds boost more quickly after gear changes
Reliable at High Boost – Withstands extreme pressure in modified or tuned setups
Silent Operation – No atmospheric venting means no turbo “blow-off” noise
Ideal for Daily Drivers – Improves performance while maintaining factory sound and comfort
Emissions Friendly – Recirculation keeps the intake system sealed and sensor-friendly
Designed for simple installation using factory-style mounts and hoses
Professional installation is recommended for optimal results
No tuning is required in most cases, but monitoring boost levels post-install is advisable
Ensure all vacuum lines and clamps are securely attached during installation
Not intended for atmospheric venting — use only in recirculating configurations
1 × GFB Mach 2 TMS Recirculating Diverter Valve (T9100)
Mounting hardware (may include gaskets, bolts, or hose fittings depending on application)
Installation instructions
The GFB Mach 2 TMS Recirculating Diverter Valve is the perfect solution for drivers who want better turbo performance without added noise. Whether you're driving a daily commuter or a tuned street machine, this valve improves boost response, maintains emissions compliance, and installs easily in place of your factory diverter valve.
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