Interesting video RPM Airgap intake flow.

There is no flow difference from the RPM-AG and the standard RPM. The standard RPM is a heated intake. This means the intake gets hot and the air within it expands. This is less available air to mix with the fuel and rejetting should be needed.

When they’re cold, there is no performance difference.
The heated intake offers greater flexibility in all driving conditions, most notably, cold weather. As in actually cold, below 35*’s.