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  1. JMS 4002F05 Analog Mass Air Modifier -- 2005-2010 Mustang, F-150 Trucks and Most Slot-Style

    JMS is revolutionizing Ford mass air fuel injection systems with the Mass Air Modifier for Ford and GM vehicles. This simple and easy to use in-line MAF tuning device is designed to accurately scale and filter the mass air signal on all MAF equipped Ford cars, trucks and SUV's.

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