Respons T9020 Diverter (20mm inlet, 20mm outlet)

🔧 Product Description

The GFB Respons T9020 Diverter Valve (20mm inlet / 20mm outlet) is a high-performance dual-port blow-off valve designed for precise control of venting bias, improved throttle response, and reliable boost handling across a wide range of turbocharged applications.

Unlike conventional dual-port valves, the Respons features GFB’s patented Venting Bias Adjustment System, allowing drivers to fine-tune how much air is recirculated versus vented to atmosphere — delivering complete control over sound and performance.

Built around GFB’s TMS (Turbo Management System) principles, the Respons is engineered to return the engine to peak boost up to 30% faster than factory diverter valves, improving drivability, response, and shift recovery.

⚙️ Key Features

• Dual-port 20mm inlet / 20mm outlet configuration
• Patented Venting Bias Adjustment System
• Adjustable sound output (silent → loud atmospheric venting)
• Maintains ECU-controlled operation (no loss of factory control)
• Eliminates stalling and drivability issues common with atmospheric BOVs
• Precision-machined internal components for long-term durability
• Unlimited boost-holding capability in performance applications
• Compatible with MAF-based and speed-density setups

🏁 Performance Benefits

⚡ Faster Boost Recovery
Returns to peak boost up to 30% faster during gear changes using TMS technology.

🚀 Improved Throttle Response
Reduces compressor lag and improves on/off throttle transition.

🔊 Adjustable Blow-Off Sound
Dial in anything from silent factory recirculation to full atmospheric “whoosh”.

🔒 Stable Boost Control
Prevents boost leakage and maintains consistent performance under load.

🔬 TMS Technology Explained

GFB’s Turbo Management System (TMS) ensures optimal valve behaviour by:

• Keeping the valve closed under boost
• Opening instantly on throttle lift
• Minimising airflow disruption during gear changes
• Improving compressor recovery efficiency

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

🚗 Vehicle Applications

SUBARU Impreza 2.0 Turbo GT EJ20T (GC8 / GF8)
SUBARU WRX GC / GC8 EJ20T (MY92–98)
TOYOTA Supra JZA80 3.0 2JZ-GTE (93–02)
FORD Laser TX3 KC–KE B6T / BPT (87–93)
MAZDASPEED MX-5 NB Turbo BP-4W (04–05)

🔩 Specifications

• Product Type: Dual-Port Adjustable Diverter / Blow-Off Valve
• Model: GFB Respons T9020
• Port Size: 20mm inlet / 20mm outlet
• Technology: TMS (Turbo Management System) + Venting Bias Control
• Fitment: Direct or kit-based application (vehicle dependent)
• Control: ECU-integrated solenoid compatibility (application dependent)

🛠️ Installation Notes

• Direct-fit or kit-specific installation depending on vehicle
• No springs required for adjustment
• Compatible with recirculation or atmospheric venting setups
• Designed for both stock and modified turbo systems
• Best performance achieved with correct hose routing and setup

💡 Why Choose the Respons T9020?

If you want:

• Full control over blow-off sound
• OEM drivability with performance gains
• Faster boost recovery between shifts
• Reliable operation under higher boost
• A true performance upgrade over factory valves

👉 The Respons T9020 delivers performance and sound flexibility in one compact, precision-engineered unit.

🏆 Perfect For

• Street performance builds
• Turbocharged AWD and RWD platforms
• Enthusiasts wanting adjustable BOV sound
• Tuned and stock turbo engines
• OEM+ reliability upgrades