Go Fast Bits Deceptor Pro II Blow Off Valve w/TMS Advantage Adjust In Cabin Subaru WRX 2008-2014 | T9501

Product Fitment: 

2008-2014 Subaru WRX

Take full command of your turbo system with the GFB Deceptor Pro II (T9501). This advanced blow-off and diverter valve gives you on-the-fly, in-cabin control of how much boost is vented to atmosphere versus recirculated — letting you switch from quiet to aggressive turbo sounds at the turn of a dial.

Perfect for turbocharged Subaru models, this valve is built for performance, durability, and daily convenience.

Key Features

• In-Cabin Venting Control – Easily adjust from full recirculation to full atmospheric venting with a backlit controller dial.

• Motorized Valve Operation – Precision high-torque servo motor delivers reliable, smooth venting transitions.

• Customizable Sound – Control how much sound your valve makes depending on your driving mood or environment.

• Durable, High-Performance Design – Built to handle high boost pressures and long-term daily driving.

• Direct Bolt-On Fitment – Replaces the factory BOV/DV without major modifications on most compatible Subaru models.

Performance Benefits

• Instant venting adjustment for both sound and airflow control

• Helps reduce compressor surge and maintain boost between shifts

• Tunable to suit your exact driving needs — from daily comfort to spirited driving

• Improves response over factory diverter valves with optimized flow and valve timing

• Enables quieter operation for street use or louder sound for track/show environments

Installation & Usage Notes

• Professional installation recommended, especially for wiring the in-cabin controller

• While tuning is not strictly required, it's recommended for optimal performance in high-boost or modified setups

• Ensure your vacuum and boost signal lines are in good condition before installation

• Always set the venting level while the engine is running for accurate positioning

• Verify that all components are securely mounted and calibrated before driving

What’s Included

• 1 × GFB Deceptor Pro II Valve (Part #T9501)

• 1 × In-Car Controller with Backlit Dial

• Wiring Harness and Connectors

• Mounting Hardware and Fittings

• User Manual and Installation Instructions

The GFB Deceptor Pro II (T9501) is an advanced, feature-rich blow-off valve upgrade for Subaru turbo models that combines convenience, performance, and customization. With in-cabin venting control, a reliable motorized actuator, and a direct bolt-on design, this is the perfect solution for drivers who want to switch between stealth and sound — without compromise.