So called porting does not really increase the arflow by any real volume to go muck with the MAF table, hell going from 75 to 85 mm is less then 100 CFM increase and that is only when in high end of PE.

Again the little change from mostly polishing the inside of a MAF is a waste of time and will make a tuning nightmare of MAF table where even a highly modified LS1 is only sucking in 600 CFM thus a stock MAF handles up to 550 flywheel HP and after several weeks of testing different MAFs but hands on experience says leave MAF table along and use injector flow to adjust FUEL trims with FUEL flow, so why screw with aiflow, they are not called airflow trim cells.