2006 STI - Roof Vane Spoiler
From Subaru Canada: "A new-for-2006 roof vane spoiler at the top of the WRX STI's rear window helps direct airflow towards the rear WRC box-type spoiler for exceptional aerodynamic performance and reduced lift." The OEM one is made of steel and at 10-12 lbs. it's quite heavy. The group buy that I entered is for a carbon fiber version that is much lighter.