i have a JA starion. for all you who dont know, that was the only model (aust delivered) with the crazy 80's bonnet scoops.
from factory, the ones on the side are totaly for show (ie no venting at all), and the front, although big like wrx's from the outside, on the inside actually no bigger than 2x postbox slit size. seemed hardly worth the effort.
i drilled all the ***cers out...... so
IMHO, goto be better than stock. the more airflow the better!