🔧 Product Description

The GFB Deceptor Pro-II T9525 Diverter / Blow Off Valve is a premium electronically adjustable boost venting system designed for a wide range of turbocharged vehicles including Audi, VW, Ford, Mazda, SAAB, and more.

Built on GFB’s proven Respons venting bias technology, the Deceptor Pro II takes boost control further by adding in-cabin electronic adjustment, allowing drivers to change BOV sound and behaviour on-the-fly.

Whether you want silent OEM-style operation or full loud atmospheric blow-off sound, the Deceptor Pro II gives you total control without sacrificing performance or drivability.

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⚙️ Key Features

• In-cabin electronic venting bias control
• Adjustable from silent OEM recirculation to full atmospheric venting
• Compact design for direct OEM replacement fitment
• Revised internal porting for improved airflow efficiency
• High-torque electric motor-driven adjustment system
• Precision sealed bearing gear system for long service life
• Includes full wiring harness and controller unit
• Suitable for stock and modified turbo applications
• Fully engineered for reliability under boost

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🏁 Performance Benefits

⚡ On-the-fly sound control
Adjust BOV volume instantly from inside the cabin.

🚀 Improved throttle response
Optimised venting reduces compressor instability during shifts.

🔒 Stable boost control
Maintains consistent boost behaviour under load.

🎯 Customisable driving experience
Switch between quiet daily driving and aggressive turbo sound instantly.

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🔬 Technology Overview

The Deceptor Pro II uses GFB’s Venting Bias System, allowing precise control over how much air is:

• Recirculated back into the intake system
• Venting to atmosphere for sound

Unlike traditional BOVs, this system allows fine-tuned balance between performance and sound, controlled electronically rather than mechanically.

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🛠️ Engineering Highlights

• CNC-machined aluminium body
• Integrated electronic motor control module
• Reinforced internal flow architecture
• Designed for OEM replacement fitment
• Tested for high-boost and tuned applications

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🚗 Vehicle Applications

Audi

• 1.8T & 2.0TFSI platforms (A3, A4, A6, TT, S3, RS variants)
• B5 / B6 / B7 / B8 chassis

Volkswagen

• Golf Mk4 / Mk5 / Mk6 GTI & R
• Jetta Mk4 / Mk5 / GLI
• Passat B5 / B6
• Scirocco, Tiguan, Polo GTI

Škoda

• Octavia Mk1 / Mk2 VRS

SEAT

• Leon Cupra Mk1
• Ibiza 1.8T models

Mazda

• MX-5 Turbo applications (NB platform)

Ford Australia

• XR6 Turbo BA / BF / FG
• Territory Turbo models

SAAB

• 9-3 Turbo (YS3D platform)
• 9-5 Turbo (YS3E platform)

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🔩 Specifications

• Product Type: Electronic Adjustable Diverter / Blow Off Valve
• Model: GFB Deceptor Pro II T9525
• Control: In-cabin electronic adjustment
• Material: CNC-machined aluminium body
• Compatibility: Turbo petrol applications
• Venting Modes: Fully recirculated / Partial / Full atmosphere
• Installation: Direct OEM replacement (vehicle dependent)

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🛠️ Installation Notes

• Direct bolt-on for supported vehicles
• Requires in-cabin controller wiring installation
• Retains factory-style vacuum/boost routing
• No ECU tuning required
• Suitable for stock and modified turbo systems

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💡 Why Choose the Deceptor Pro II?

If you want:

• Full control over turbo sound from inside the car
• OEM drivability with performance capability
• A premium electronic upgrade over manual BOVs
• Reliable boost control under high load
• A flexible setup for daily + performance driving

👉 The Deceptor Pro II T9525 delivers sound, performance, and control in one system.

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🏆 Perfect For

• Enthusiasts wanting adjustable turbo sound
• Modified turbocharged street cars
• OEM+ performance builds
• Drivers who want both stealth and loud modes
• Daily driven performance vehicles