Static Dyno tests with the bonnet up and filter exposed to ambient temps is a different scenario to bonnet closed and exposed heat soaked pods. Often pods are incorrectly referred to as a CAI. But there are potential gains to be made if you can seal off the filter from the engine bay and feed it from a place that has a good flow of positive pressure. Essentially though. This is what the stock system does. Hence a real world test is unlikely to see a real gains.
AutoSpeed - More on Siting Cold Air Intakes