Subaru WRX (2015-2021) /STI Rear Under Spoiler With Chassis Mounts & Rear Extension

  • $350.00

or make 4 interest-free payments of $87.50 fortnightly with Afterpay More info

Suits 2014-Present VA WRX & STI models


Looking for the Flow-Lock experience? Click here for our rear diffuser


Our Rear Under Spoiler includes chassis mounts which are hardened steel mounts that bolt directly onto the metal OEM VA WRX/STI rear without having the need to drill any additional holes, giving our under spoiler improved strength and stability.

The 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 conservatively or more aggressively, with a simple 4mm Allen key wrench. Adjustments can be done in just a few minutes when installed on the car.

Full movement can be seen in the video above. Once the desired position is set, tighten and you're ready to go. Chassis mounts are included with the rear diffuser kit to guarantee secure fitment!

Kit Includes:

  • Subaru VA WRX/STI rear valance
  • Subaru VA WRX/STI rear valance chassis mounts (pair)
  • Subaru VA WRX/STI center support bracket
  • BONUS: Subaru VA WRX/STI rear under spoiler extension
  • x2 Flow Designs stickers
  • Fitting kit with black stainless hardware

Material & Finish:

  • Valance: 10mm thick polyethylene composite, bevelled edges
  • Rear Under Spoiler Extension: 4.5mm thick textured ABS 
  • Valance: Hand polished satin black
  • Rear Under Spoiler Extension: scratch resistant textured ABS plastic
  • CNC engraved logo and features
Install Instructions Page 1 (PDF)

Install Instructions Page 2 (PDF)