GFB T9107 Mach 2 TMS Recirculating Diverter Valve (2015-on WRX/ Forrester)

The GFB T9107 Mach 2 TMS Recirculating Diverter Valve from Go Fast Bits (GFB) is a high-performance OEM replacement designed for Subaru FA20 turbocharged engines including WRX, Levorg, and XT platforms.

Built around proven TMS (Turbo Management System) technology, the Mach 2 improves boost recovery, throttle response, and overall drivability while maintaining a 100% recirculating (plumb-back) configuration for OEM-style operation.

Designed as a direct bolt-on upgrade, it delivers improved performance without requiring modifications, tuning, or additional hardware.

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⚙️ GFB T9107 Mach 2 TMS Recirculating Diverter Valve Key Features

• Direct OEM replacement diverter valve
• Designed for Subaru FA20 turbo engines
• 100% recirculating (plumb-back) configuration
• Optional atmosphere venting conversion kit available
• CNC-machined aluminium construction
• GFB TMS (Turbo Management System) technology
• Bolt-on installation – no modifications required
• High boost holding capability (effectively unlimited)
• Improved throttle response and boost recovery

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🏁 Performance Benefits

⚡ Up to 30% Faster Boost Recovery

Using GFB’s TMS technology, the Mach 2 can return the turbo to peak boost up to 30% faster than factory diverter valves during gear changes.

🚀 Sharper Throttle Response

Factory valves are designed to open early for safety, which can slow response. The Mach 2 stays sealed under boost for a more immediate engine feel.

🔒 Stronger Boost Retention

Replaces weak OEM plastic or diaphragm valves that can leak under higher boost, improving consistency and efficiency.

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🔬 TMS Technology Explained

The Turbo Management System (TMS) improves how boost is managed during throttle transitions:

• Valve remains closed under boost pressure
• Opens instantly on throttle lift
• Closes progressively as pressure stabilises
• Maintains airflow stability during shifts

👉 Result: faster spool recovery, smoother boost delivery, and improved drivability

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🔊 Venting Options

Recirculating Mode (Standard)

• Quiet OEM-style operation
• Ideal for daily driving and tuned setups

Atmosphere Conversion (Optional Kit)

• Adds blow-off sound
• Maintains controlled operation to prevent stalling issues

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🚗 Vehicle Applications

• Subaru WRX MY14-on (FA20 engine)
• Subaru XT MY14-on (FA20 engine)
• Subaru Levorg FA20 Turbo MY16-on
• FA20 turbocharged Subaru platforms

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🔩 Specifications

• Product Type: Recirculating Diverter Valve
• Technology: GFB TMS (Turbo Management System)
• Material: CNC-machined aluminium
• Configuration: 100% recirc (optional atmo conversion)
• Fitment: Direct bolt-on
• Engine: FA20 turbo

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🛠️ Installation Notes

• Direct replacement for OEM FA20 diverter valve
• No tuning required
• Uses factory vacuum/boost lines
• Optional atmo conversion kit available
• Fully reversible installation

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💡 Why Choose the Mach 2?

If you want:

• Faster turbo response on FA20 engines
• Reliable OEM+ upgrade over factory valve
• Optional sound without drivability issues
• Stronger boost control under high load

👉 The Mach 2 is one of the most effective bolt-on diverter upgrades for modern Subaru turbo platforms.

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🏆 Perfect For

• Subaru WRX performance builds
• Levorg turbo upgrades
• FA20 tuned street setups
• Drivers wanting OEM reliability with sharper response