Is there any advantage to using a different air filter to the standard Fiat OEM fitment hen?
Does a free flow air filter make any difference on a modern ECU controlled engine, or does it need remapping?
On a modern ECU controlled engine where the airflow is controlled by a butterfly valve, it will only make a difference when the engine is operating at full throttle. But at full bore, there may be some gain to be had and the engine ECU will automatically adjust the fuelling to compensate.