Big Air Series Mass Air Meter by SCT Performance®. Get add-on performance for your vehicle with SCT Big Air mass air meter. They’re great for your modified and custom-tuned applications where the stock mass air meter “pegs” due to increased airflow. SCT Big Air meters feature OEM-quality calibration for factory-level drivability, repeated accuracy, and reliability. These aluminum 90mm mass air meters can handle much more power than your wimpy stock unit. The MAF supports 400rwhp to 625rwhp on centrifugal blower applications, and 400rwhp to 700 rwhp with root style blower applications.