ok for me i got the larger maf cause i wanted a larger one that is smooth and flows more air. From what i understand what PRO- flow does is supposed to set the MAF to the same calibrations as the stock one, but since its larger it needs to have more air pass through the sensor to match the calibration and keep ur A/F the same. Now with the SAFC you take the stock settings and change it up that is also what the optimizer would do for you. The only code i get on the scanner is a P1000 which means test not complete. hope someone can help me...and i do have a safc but after i had that installed i left the settings to ZERo cause i had the CEL but even after resetting thed comp the 2nd cycle of the car it comes bacm
