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Flow Designs Rear Under Spoiler Extension suits Subaru Impreza WRX, STI VA1, VA2


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The new Flow Designs splitter set for Subaru WRX/STI (VA) include front & side splitters, rear spats & rear under spoiler extension. Every piece of this set has optional adjustable winglets to make exterior styling truly a custom artform. Everything is hand polished to satin black & easy to install!

Our Adjustable Under Spoiler extension will directlyÊbolt onto our Flow Designs Rear under spoiler for the VA1/VA2 WRX/STI thanks to the Pre-Pressed in threaded brass fittings installed in theÊSpoiler

This attachment allows the spoiler to be extended between 0mm-20mm

Kit Includes:

  • Adjustable rear diffuser
  • Mounting hardware
  • 2 Flow Designs Stickers
  • Fitting kit


  • 4.5mm thick ABS plastics


  • Bevelled edges
  • Scratch resistant textured ABS plastic

Required Parts:

- Subaru VA1/VA2 WRX/STI Rear under spoiler


Install Instructions (PDF)