Cold Air Intake Usefull ?

Originally Posted by Caravanshaka

but, to do modshacks mod correctly, you need to resize the MAF tubes to "trick" the sensor into thinking less air is coming into the engine than really is, therefore leaning out your air/fuel ratio to produce a little more power.

Keeping stock MAF tubes and smoothing the rest will yield a little more efficiency, but won't cause any change in the A/F ratio.