| I don't remember the specifics off hand, but it goes something like this: A single MAF outputs a max voltage of 5.12 volts at max flow. This is all the ECU can handle. If two MAFs are used, and the combined output exceeds 5.12 volts, you need a dual pop chip. A dual pop chip allows you to average instead of add the 2 MAF outputs because your ECU k value is half of what it is for a single pop chip. This enables your ECU to be able to read twice the airflow before it is maxed out at 5.12 volts. In a nut shell, if you are capable of making over ~500 RWHP, you really need a dual pop chip
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