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Fits: 2001-'06 fuel injected HD® big twins equipped with S&S® Delphi® style VFI module. Compatible with 2007-'16. Will not work with stock ECM (Engine Control Module). Makes tuning a breeze.The S&S® closed loop system modifies the base fuel map to meet the specific requirements of your engine. Heated narrow band O2 sensors start working fast.
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