[MontyCarlo]

There will be some point where a camaro with an Airaid intake will have the same mass airflow as a stock car at sea level, but it's probably in the 1,000-2,000ft range.

Air pressure (and density, assuming temperature's the same) going into the engine depends on outside air pressure minus pressure loss through the intake. The Airaid intake will have a smaller pressure loss, so it'd definitely be able to go to some higher altitude and get the same flow density into the engine as a stock system at sea level, but exactly what altitude? Can't calculate that without some fluid flow modelling. Now, if somebody wants to send me CAD data for both intakes...