This is a discussion on Noob question..... What is this part?? within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; what is it called? does it have a purpose? or is it purely cosmetic? can it go on a 02,03 ...
That would be a roof spoiler, cosmetic and im sure anything is possible for putting one on your car. I would assume you would have to drill some holes to make it attach however.
2005 WRB WRX "was" STAGE 2
-Yes; directs air to rear wing which causes more downforce, cosmetic if no rear sti wing
-Yes, fits all GD bodies
Hawk-Eye Alliance #128
In theory, it is supposed to maintain laminar airflow over the roof, rear window and the rear spoiler. Not only to maintain downforce, but maintaining laminar flow over the length of the vehicle reduces drag.
Here's an example, ever see people in trucks that drive around with their tailgate open? Supposedly they think they are reducing drag but actually they are increasing it! When the tailgate is closed, an air rotor forms in the bed and helps maintain smooth airflow over the truck, when the tailgate is lowered, the rotor doesn't form, and so when air spills over the roof of the cab, it becomes turbulent increasing drag.
The top spoiler or vent helps maintain that smooth flow. In theory.