""that should be the purpose as i understand it steve, especially if you look at the UAS one on the S1 grill, it allows airflow under it and seals the top, (you need to make sure that air can reach the factory norkel/air intake). sealing the radiator on top should lead to efficiency gains. Same goes for the IC. ""
as I said the top is allready sealed with the factory bonnet
The top wasn't blocked !