Ford Mustang 2004 V6 3.9L Petrol Naturally Aspirated. Ford Mustang 2001-2004 V6 3.8L Petrol Naturally Aspirated. Ford Mustang 2001-2004 V8 4.6L Petrol Naturally Aspirated. Filtering: The fuel filter in the Fuel pump assembly can filter out impurities and pollutants in the fuel, preventing them from entering the engine.
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