Thats exactly what I'm saying.
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:<hr /><font size="1" face="Verdana, Helvetica, sans-serif">Adding a free flow exhaust, decatting, induction kit etc. all do the same thing increase the flow of air in and out the engine and the engine management will fuel to suit. A usual system will cope with a 10 to 15 percent increase in maximum airflow so you are never going to over egg it with exhaust and filters.<hr /></blockquote><font size="1" face="Verdana, Helvetica, sans-serif">The air filter/free flow exhaust will increase air flow, the MAF will measure it and the management will fuel to match the increased air flow thus giving more power.
The point I was making is that there is no problem with increased air flow causing a weak air/fuel mixture. Even if you some how managed to flow a greater quantity of air than the MAF could measure (nearly impossible on normaly aspirated engines)the sensor would go over range or the lamda would pick up the weak burn and you would probably get at least an ECU warning light up and if you had a Fly by wire throttle the ECU would probably close the throttle to a suitable level, some systems would drop onto a limp program.