BBK Performance Parts Mass Air Meters for Ford Mustang applications are made of CNC-machined, powder-coated 356 or billet aluminum, then fitted with a BBK electronically calibrated mass air sensor module for accurate air/fuel ratios. Calibrations are available for standard factory air box or cold air intake kits with various injector pounds. These replacement mass air meters pair perfectly with increased intake inlet tub size and offer a smooth transition of air flow.