MACH 2 TMS (20mm inlet, 20mm outlet)

🔧 Product Description

The GFB Mach 2 TMS Blow-Off Valve (20mm inlet / 20mm outlet) is a simple yet highly effective performance upgrade from Go Fast Bits, engineered to deliver up to 30% faster boost recovery and significantly improved throttle response.

Utilising GFB’s proven TMS (Turbo Management System) technology, the Mach 2 is designed as a direct factory diverter valve replacement, offering improved performance without the complexity of adjustable systems like the Respons or Deceptor Pro.

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⚙️ Key Features

• 20mm inlet / 20mm outlet configuration
• Proven TMS technology for superior boost control
• Up to 30% faster boost recovery vs factory valves
• 100% recirculating (plumb-back) design as standard
• Optional atmosphere conversion kits available
• Direct bolt-on fitment – no mods required
• Handles extreme boost levels (virtually unlimited)
• Lightweight, high-quality anodised construction

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🏁 Performance Benefits

• ⚡ Faster return to peak boost between gear shifts
• 🚀 Improved throttle response and acceleration
• 🔒 Eliminates boost leaks common in factory valves
• 🔊 Flexible setup – quiet recirc or loud atmo (optional)
• 🛠 Fixes OEM bypass valve limitations

Factory bypass valves typically:

• Open prematurely under boost
• Lack throttle response optimisation
• Cannot vent to atmosphere without causing stalling

👉 The Mach 2 solves all of these issues with precision TMS control.

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🔬 TMS Technology Explained

GFB’s Turbo Management System (TMS) ensures:

• The valve remains fully sealed under boost
• Opens instantly on throttle lift
• Maintains maximum turbo efficiency and response

Result: quicker spool, smoother power delivery, and stronger acceleration.

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🔄 Venting Options

• ✅ Recirculating (Standard)
  • OEM-style quiet operation
  • Ideal for daily driving
• 🔊 Atmosphere (Optional Conversion Kit)
  • Aggressive blow-off sound
  • No stalling issues thanks to TMS design

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🚗 Vehicle Applications

Subaru

• Impreza WRX GC8 (MY94–00)
• Impreza GT EJ20T (Sedan & Wagon)

Toyota

• Supra JZA80 2JZ-GTE (1993–2002)

Ford Australia

• Laser TX3 (KC–KE, KF–KH turbo models)

Mazda

• Mazdaspeed MX-5 NB Turbo (2004–2005)

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🔩 Specifications

• Product Type: Blow-off valve (recirculating)
• Inlet/Outlet Size: 20mm / 20mm
• Technology: TMS (Turbo Management System)
• Venting: Recirc standard / Atmosphere optional
• Fitment: Direct bolt-on kits available
• Boost Capacity: Virtually unlimited
• Brand: Go Fast Bits (GFB)

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🛠️ Installation Notes

• Direct replacement of factory bypass/diverter valve
• No additional adaptors or modifications required
• Optional atmosphere kit can be installed later
• Ideal for MAF-based turbo vehicles

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💡 Why Choose the Mach 2 TMS?

If you want:

• A simple bolt-on performance upgrade
• Faster boost response without tuning complexity
• The option of quiet or loud operation

👉 The Mach 2 is one of the best OEM+ turbo upgrades available.

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🏆 Perfect For

• Daily-driven turbo cars
• Mild to high-performance builds
• Drivers wanting reliable gains without adjustability
• Anyone upgrading from a weak factory diverter valve

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✅ Summary

The GFB Mach 2 TMS (20mm) is a proven, no-fuss upgrade that delivers real performance gains. With faster boost recovery, improved throttle response, and flexible venting options, it’s the perfect choice for enthusiasts who want maximum results with minimal effort.