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Gurney Flap for 2009-14 WRX Hatchback, 2008-14 STI Hatchback


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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

Pricing: $119.00


Aggressive Aesthetics

The PERRIN Gurney Flap adds aggressive styling to your trunk spoiler. Without looking too intrusive, the Gurney flap modification adds a small amount of height to your existing spoiler for a clean, clearly modified look.

What is a Gurney Flap?

The Gurney Flap is a small tab projecting from the trailing edge of a wing. Typically it is set at a right angle to the pressure side surface of the airfoil, and projects 1% to 2% of the wing chord. This trailing edge device can improve the performance of a simple airfoil to nearly the same level as a complex high-performance design.

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Securely Mounted - Peace of Mind

The PERRIN Gurney Flap is mounted to the rear wing by drilling holes and bolting on. Other gurney flaps mount with double-sided tape and advertise an equally strong attachment. The PERRIN Gurney Flap will be secured much better with its bolts than a wing with tape for much greater peace of mind.

Flow Analysis - COMING SOON!

With other PERRIN Gurney Flaps, they have been tested to see what sort of performance increase can be found. Stay tuned for tests performed on the PERRIN Gurney Flap for 2009-14 WRX & 2008-14 STI!


Each PERRIN Gurney Flap has a semi-gloss black finish which looks good with every Subaru color. We ensure durability against the elements by using powdercoat paint which can be applied thicker and has a hard finish that is tougher than conventional paint.


The PERRIN Gurney Flap is constructed from 10g 6061-T6 plate aluminum to eliminate corrosion and rusting. Precision laser cut, slotted holes allow for alignment adjustments during installation for a perfect fit.


Installation of the PERRIN Gurney Flap is easy with our step-by-step instructions and addition of our included threadsert hand tool. The PERRIN Gurney Flap does require drilling into the existing trunk spoiler and the final look is definitely worth it.

5 Year Warranty

PERRIN Performance warrants to the original purchaser, all PERRIN products to be free from defects in material and workmanship within a sixty (60) month period from the date of purchase. *Some exclusions apply
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Warranty Details

This product features a 5 year warranty Read Full Warranty

Tech Department


Compatibility Detail


2008-14 STI Hatchback Yes
2009-14 WRX Hatchback Yes
2008 WRX Hatchback No

In The Box

In The Box

(1) PERRIN Gurney Flap
(1) Installation tool
All necessary mounting hardware


Shipping Information

  • Item Requires Shipping
  • 2.0 lbs.
  • W3.0000” x H7.0000” x L47.0000”
  • This item ships in its own box.