PMAS is the ONLY aftermarket mass airflow manufacturer to use N.I.S.T. traceable equipment to produce Mass airflow sensors. PMAS is the only mass airflow manufacturer with a flow station capable of flowing higher than 1500 KG/HR (400HP). Our stand can flow over 8000 KG/HR. Our capabilities insure accurate and repeatable MAF calibrations within 1%. For perfect drivability. *Does not include MAF sensor.