MAF does not indicate injector calibration. EEC calibrates the injectors. The only comp calibrated for anything other than 19s is the cobra for 24lb injectors. The after market meters trick the computer into thinking there are 19 pound injectors with the availability of more power with more injector. I have a pro m 75 programmable in the classifieds for stock injectors but you can send it to have it re programmed to pro m . Either way is a gain in power.