Martin in theory yes, but i compared my radtec and my airtec side by side, and the radtec you could barely see any daylight through and the airtec there was loads... Showing the amount of restriction on the airflow the radtec caused me.
I think mark has a good point about the bonnet and bumper, i have a standard bonnet and modified bumper, im thinking of doing a few runs with an rst bonnet to see if that helps the air flow after its been through the rad