Cold is relative. The materials and geometry in your aftermarket intake are less susceptible to heat soak than the OEM air box. Less heat transfer from engine bay to air intake results in a net lower inlet air temp over stock. It's not cooling the air, it's just keeping more engine bay heat out of the air. Remember, heat transfer is always hot to cold. 1st law of thermodynamics stuff. Ice doesn't cool your glass of water; the water heats the ice. Hot to cold.
The higher flow is from a less restrictive filter design, and less turbulent flow from filter to throttle body as compared to factory set up.
The difference in degrees F and cfm flow are marginal, but allow aftermarket to advertise the way they do.
