I have the '04 version of that and did similar covers for those indents.
I'm actually thinking of opening them and using those to bring the air into the radiator
so I can clean up the center line and go for a better, over the car flow.
The Civics grill, (yours and mine) remind me of this thread
http://ecomodder.com/forum/showthrea...ille-7838.html
about the 'self closing grill'.
I had an upper grill block but took it off during this warmer weather.
That's why I'm looking at the lower block with maybe an air dam/splitter,
using the 'vents' in front of the wheels as the entry for the cooling.