[RED92LX50]

I've seen varying opinions - but you may need to make sure that the MAF Sensor is calibrated for use with a CAI setup. I have seen many posts where someonce has poor idle and surging with CAI and a new MAF, their problems have gone away by switching back to the stock airbox, or running a conical filter directly in front of the MAF sensor. In fact, I have seen Pro-M adds for MAF's calibrated to work with CAI, I think it has to do with the 90 degree bend in the tube - versus a straight shot from a conical filter on the end of the sensor.