Originally Posted by Zsteve

Not sure what the thickness of the piping has to do with anything at the MAF location. Its about the diameter of the piping, and that is how some intakes are making the gains they are, is that they make the MAF size a little bigger tricking the ECU on the actual amount of air coming in (more air coming in but the ECU thinks less is coming in cuz the larger pipe means less velocity, if I remember the explanation to me before about this) which then causes the ECU to adjust in a way to make more power.