Subaru VA1/VA2 WRX/STI Rear Under Spoiler with Chassis Mounts & Rear Extension

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  • Regular price $350.00

Australian delivery: 1-7 days | International delivery: 7-10 days

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Suits WRX & STI



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!

Hardened Steel mounts bolts directly onto OEM locations without having the need to drill any additional holes giving our under spoiler strength and stability.

Our suspended spoiler can then be easily installed and adjusted on the car by up from 0mm - 20mm. This design gives you the flexibility to run the spoiler consertively or more aggressive with just a simple 4mm allen key wrench. Adjustments can be done in just a few minutes on the car.


Kit Includes:

  • Adjustable rear diffuser
  • Rear under spoiler extension
  • Pair of chassis mounts
  • Center support bracket
  • Mounting hardware
  • 2 Flow Designs Stickers
  • Fitting kit


  • 10mm thick polyethylene composite, bevelled edges


  • Hand polished satin black


Why do we use Polyethylene Composite for Flow Designs Splitters?

Strong, impact resistant, doesn't corrode or chip, and has excellent abrasion resistance (say… from scraping on driveways and road all the time?)

Carbon Fibre is better isn’t it?

As strong and light as Carbon fibre is, it CRACKS on impact or when under load and/or stress. Clear coat will eventually fades & cracks and become undesirable.

Install Instructions 1 (PDF)


Install Instructions 2 (PDF)