Super AFC. Is and after-market air flow converter made by A'PEXi. The Air Flow Converters work by intercepting the signal between the car's air flow meter and the ECU.
The Air Flow Meter is the device that tells the ECU how much air is entering the engine so that the ECU can add the correct amount of fuel.
Dude I just installed a S-AFC on my car and boy is it chipping black bow.