MAC 73mm Mass Air Meter for 2001-2004 V6 Mustangs.Having a properly calibrated mass air meter is the most important factor to consider when choosing an aftermarket MAF meter. The meter should be calibrated to match the flow rating of the fuel injectors, in conjunction with the PCM (engine computer) being used for the given application. A properly calibrated MAF meter will result in a meter that generates an accurate voltage signal vs. the air mass entering the engine throughout the entire RPM rangef the engine. If the meter you are using is not properly calibrated, the meter may "peg" (reach maximum voltage output) before the engine reaches maximum airflow, which will result in an inaccurate air/fuel ratio, causing a loss in horsepower, or even poential engine damage. In contrast, it may fall below the PCM's expected minimum voltage input at idle speed, which will result in the PCM entering a "failure mode", which will cause a very rich condition at idle. A properly calibrated MAF meter ensures tat the PCM receives a correct signal throughout the engine's entire operating range, resulting in a proper air/fuel mixture, maximum horsepower, excellent drivability, and maximum fuel economy.
*Intended for the stock fuel injectors.
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I would highly recommend NOT buying this mass air meter. First off i did not notice much of a difference compared to my stock mass air meter. Second I bought this mass air meter in September 2012 and three months later I took apart my CAI system to do some work on my car and the mass air meter fell apart. The black plastic part that is connected to the mass air tube separated due to the melting of glue!!! I called the company the very next day and the guy told me that I could glue the part back together and when I asked him for my money back, he just told me that it is a used product even though it was the companies fault. Very disappointing and will never buy anything from Mac Performance again.
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