Mach 2 T9135 TMS Recirculating Diverter valve

The Mach 2 T9135 TMS Recirculating Diverter valve is a direct-fit performance upgrade from Go Fast Bits, designed specifically for turbocharged vehicles like the MY97–98 Subaru WRX GC8 and STi.

Built with proven TMS (Turbo Management System) technology, the Mach 2 delivers up to 30% faster boost recovery, improved throttle response, and superior boost holding compared to factory diverter valves—all in a simple, bolt-on package.

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⚙️ Key Features

• Part Number: T9135
• Inlet Size: 35mm
• Outlet Size: 30mm
• 100% recirculating (plumb-back) design
• Utilises GFB TMS technology
• Up to 30% faster boost recovery
• Direct bolt-on replacement – no modifications required
• Optional atmosphere conversion kit available
• Handles extreme boost levels (virtually unlimited)

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🏁 Performance Benefits

• ⚡ Faster return to peak boost between gear changes
• 🚀 Sharper throttle response and acceleration
• 🔒 Eliminates boost leaks common with factory valves
• 🔊 Option for quiet OEM-style or loud atmo setup
• 🛠 Improves overall turbo efficiency

Factory diverter valves often:

• Open too early under boost
• Restrict performance
• Cannot vent to atmosphere without stalling

👉 The Mach 2 eliminates these issues with precision engineering.

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🔬 TMS Technology Explained

GFB’s Turbo Management System (TMS) ensures:

• Valve stays fully sealed under boost
• Opens instantly when throttle is lifted
• Maintains maximum turbo efficiency and response

Result: quicker spool, smoother power delivery, and stronger mid-range performance.

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🔄 Venting Options

• ✅ Recirculating (Standard)
  • Quiet operation
  • Perfect OEM replacement
• 🔊 Atmosphere (Optional Conversion Kit)
  • Aggressive blow-off sound
  • No stalling issues thanks to TMS design

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🚗 Vehicle Applications

Subaru

• WRX MY97–98 GC8
• STi MY94–98 GC8

Nissan

• 180SX S13 (CA18DET / SR20DET)
• Silvia S13 SR20DET
• Pulsar GTi-R N14
• 300ZX Z32 Twin Turbo

Toyota

• Celica GT-Four ST165 / ST185 / ST205

Holden

• Commodore VL RB30ET

Mazda

• 626 Turbo / MX6 Turbo
• MX-5 Mazdaspeed NB

Mitsubishi

• Starion / Cordia Turbo

Ford Australia

• TX3 / TX5 Turbo models

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🔩 Specifications

• Product Type: Recirculating diverter valve
• Part Number: T9135
• Inlet/Outlet: 35mm / 30mm
• Technology: TMS (Turbo Management System)
• Venting: Recirc standard / Atmosphere optional
• Fitment: Direct bolt-on
• Boost Capacity: Virtually unlimited
• Brand: Go Fast Bits (GFB)

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🛠️ Installation Notes

• Remove factory bypass valve
• Install Mach 2 T9135 directly in place
• No additional adaptors or modifications required
• Optional atmosphere conversion can be added later

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💡 Why Choose the T9135 Mach 2?

If you want:

• A perfect OEM replacement for GC8 WRX/STi
• Noticeable performance gains without complexity
• The option of quiet or loud operation

👉 This is one of the best plug-and-play turbo upgrades available.

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🏆 Perfect For

• Subaru GC8 WRX/STi owners
• Daily-driven turbo cars
• Mild to high-performance builds
• Anyone upgrading from a weak factory diverter valve

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✅ Summary

The GFB Mach 2 T9135 TMS Diverter Valve is a simple, high-impact upgrade that delivers faster boost recovery, improved throttle response, and rock-solid reliability. Designed as a true bolt-on solution, it’s the ideal upgrade for enthusiasts wanting maximum performance with zero hassle.