GFB T9107 Mach 2 TMS Recirculating Diverter Valve for 2015-2021 Subaru WRX

Vehicle Fitment

• 2015-2021 Subaru WRX (FA20 engine)
• 2014-2018 Subaru Forester XT (FA20 engine)
• 2016+ Subaru Levorg (FB16/FA20 turbo)

Fitment Notes

• Direct bolt-on replacement for factory bypass valve
• Designed specifically for FA20 and FB16 turbocharged engines
• No additional adapters, parts, or vehicle modifications required
• May require atmosphere conversion kit (sold separately) for blow-off sound
• Not compatible with EJ-series engines (use T9103 for 2002-2014 WRX/STI)

Features

• TMS (Turbo Management Solutions) technology for up to 30% faster boost recovery on gearshift
• 100% recirculating operation for silent factory-style performance
• Pressure-balanced design holds unlimited boost (100+ PSI capability)
• Single outlet configured for full recirculation (plumb back/bypass)
• Eliminates factory diverter valve shortcomings and boost creep
• Smoother driveability eliminates freeway speed surging
• Will not cause CEL, rich running, stalling, or fuel system issues
• Optional atmosphere conversion kit available for blow-off sound

Specifications

• Part Number: T9107
• Type: Recirculating Diverter Valve
• Boost Holding Capacity: 100+ PSI
• Boost Recovery: Up to 30% faster than factory
• Venting Configuration: 100% recirculating (atmosphere conversion available)
• Quality Standard: ISO 9001 certified manufacturing
• Country of Origin: Australia

Included Components

• GFB Mach 2 T9107 diverter valve
• Mounting hardware
• Gasket
• Allen key for adjustment
• Installation instructions

Product Description

The Go Fast Bits Mach 2 T9107 is a direct bolt-on replacement diverter valve engineered specifically for FA20 and FB16 turbocharged Subaru applications. Utilizing GFB's proven TMS technology, this valve delivers up to 30% faster boost recovery during gear changes compared to factory bypass valves, resulting in noticeably improved throttle response and reduced turbo lag. The pressure-balanced design can hold over 100 PSI of boost pressure, far exceeding what any turbo could produce. Configured from the factory as a 100% recirculating valve, the T9107 provides all the performance benefits without blow-off noise, making it ideal for those seeking a sleeper appearance. For enthusiasts who want the classic turbo sound, an optional atmosphere conversion kit is available separately. Manufactured in Australia to ISO 9001 standards, the Mach 2 eliminates common factory diverter valve issues including boost creep and inconsistent operation without causing check engine lights or driveability problems.