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Want more?   Meet the chief engineer What GFB customers say Installation instructions Download new catalogue Technical information Videos Sponsored cars How to choose a BOV Links   Don't just take our word for it, see for yourself!   The Hot4s EVO gets GFB'd Chris DeJager - Drift Australia '07 Round 2 Featuring GFB Stealth FX, Deceptor Pro, & some funny stuff! Watch clip   Deceptor Pro in action Project STi by Ignition DVD   Featuring GFB Deceptor Pro, short shift kit & pulley set   Part 1: What is the Stealth FX? Part 2: How to install the Stealth FX? Brief introduction to the patented GFB Stealth FX Demonstrated on an MY01-07 WRX   Part 3: How to adjust BOV spring pre-load Part 4: Adjusting the volume on the Stealth FX? Demonstrated on the Stealth FX     Protecnica STi drifter 1 Protecnica STi drifter 2 Download clip Download clip