GFB VTA Diverter Valve w/Integrated SolenoidVTA T9401 expands the blow off sound options for your VW or Audi! The VTA is a performance blow off valve solution for Audi or VW vehicles with an electronic factory diverter valve. Choose Your Sound: With the removable extended trumpet, you can configure the T9401 to give you either a classic whoosh, or the loudest, most unique whistle sound youve ever heard on a Euro vehicle! Customise Your Sound: The T9401 also features adjustable spring pre load
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