The mass air flow system, also known as the mass air flow sensor (MAF), is a sensor that determined the mass flow rate of air entering your vehicle . This information is extremely important because it gets delivered to your ECU to balance and deliver the correct fuel to the engine. The proper ratio of air/fuel is extremely important to protect your engine. If you’ve upgraded your intake system, chances are your factory MAF may not be able to gauge the higher volume of air you’re now receiving. This can make it difficult for your vehicle to receive the correct amount of fuel. A high performance mass airflow sensor has larger bores, and is designed to read larger volumes of airflow accurately. If you have any questions about mass air flow sensors reach out to one of our experienced representatives and we will help you make a more informative decision for your vehicle .