Part 1: What Is Stealth FX?

Brief introduction to the patented GFB Stealth FX

Part 2: How to install the Stealth FX?

Demonstrated on an MY01-07 WRX

Part 3: How to adjust BOV spring pre-load

Demonstrated on the Stealth FX

Part 4: Adjusting the volume on the Stealth FX?

Deceptor Pro in action