Special Air intake system incrases the power???

The Honda specialist claims that the installing special air intake system
can incrases the power. He said you don't need a incrase engine size to
increase the power. I don't get it how the Air intake system by incrasing
income gir going into engine could incrase the power. I thought you need
a bigger engine to incrase the power. How can more air could incrase the
power? I don't get it. Does any here can verify this is right or not?

 

If you can cram more air in there, you can also inject more fuel, and
thus get more power. An air intake system with less restrictions helps,
as does taking in cold outside air rather than warm air from the engine
compartment. This is because cold air is denser than warm air, so a
cubic meter of cold air contains more molecules of O2 than a cubic meter
of warm air.

Turbos and superchargers increase power for the same reason, they push
more air into the engine. Of course turbos and superchargers these
provide a much larger power gain than a better air intake does.

 

In my opinion, the increase air presure/flow is not worth the bad fuel
economy. However, if the engine is already giving poor economy (e.g many
of the GM/Dawoo cars), screwing around with the air flow might result in
a better setup.

Pars

 

More air plus more fuel can sometimes equal more power. Compare the cost of
the intake vs. the negligible (if any) hp increase. Also, with some intakes
on some cars you lose the cold start function, can actually lose hp, louder,
sounds like a mooing cow in distress.