Deceptor Pro II T9501 Diverter 

🔧 DECEPTOR PRO II T9501

Electronic Adjustable Blow-Off Valve (BOV) with In-Cabin Control + GFB TMS Technology

The Deceptor Pro II T9501 is a premium electronic blow-off valve designed for Subaru turbocharged platforms, giving you full control over how your turbo sounds and performs — directly from inside the cabin.

Using GFB’s Turbo Management System (TMS), it improves boost recovery and throttle response while maintaining smooth OEM drivability. Unlike fixed or vacuum-only valves, the Deceptor Pro II lets you adjust venting behaviour in real time for the exact driving experience you want.

⚙️ KEY FEATURES

• 🎛️ In-cabin electronic control system
  Adjust BOV sound from silent OEM recirculation to full atmospheric venting at the turn of a dial
• ⚡ GFB TMS boost recovery technology
  Helps the engine return to peak boost faster after gear changes
• 🔄 Fully adjustable venting bias
  Blend between recirculation and atmosphere venting to suit street, performance, or track use
• 🧠 Precision motorised valve control
  High-torque electric actuator for accurate, repeatable adjustment
• 🧩 Direct bolt-on fitment
  Designed to replace the factory diverter valve with no major modifications
• 🔌 Complete plug-and-play kit
  Includes controller, wiring, and all hardware required for installation

🏁 PERFORMANCE BENEFITS

• ⚡ Instant, adjustable BOV sound control
• 🚀 Faster boost recovery between shifts
• 🔥 Sharper throttle response under load
• 🔒 Maintains OEM drivability when fully recirculated
• 🎯 Custom tuning of venting for daily, spirited, or track driving

🚗 VEHICLE APPLICATIONS

• SUBARU WRX MY08-on
• SUBARU WRX STI MY08-14
• SUBARU GT Legacy BL/BP MY03-09
• SUBARU Forester XT SH MY09-12

🔬 OVERVIEW

The Deceptor Pro II combines performance engineering with user control. By allowing adjustable venting bias, it eliminates the compromise between loud blow-off sound and smooth factory operation. Set it quiet for daily driving, or open it up for maximum sound and response — all without changing hardware.