Bully Dog 46521 Heavy Duty ECM Tuner

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The Bully Dog 46521 Heavy Duty ECM Tuner is the perfect product for those fleet owners who want to tune and go. This Heavy-Duty tuner is streamlined to include 3 power levels, a speed limiter calibration features, and a DTC trouble code reader. The beauty of the ECM Tuner is in its simplicity; simply select your desired power level for the drive ahead, complete the install and store the tuner on-board to enjoy the perks of Bully Dog tuning. Features: 6% - 15% Power Increase Speed Limiter Adjustments  6% - 12% Fuel Mileage Increase  Diagnostic Trouble Code Reader Power Levels: Economy (6%-10% Gain) Economy & Power (6%-12% Gain, 35HP-75HP) Power (15% Gain, 75HP-100HP) CAT Applications:  1994-2000 3406E 14.6L  2002-2010 7.2L C-7  2004-2010 9.3L C-9 1999-2003 10.3L C-10 2004-2010 11.1L C-11  1997-2003 12.0L C-12 2004-2010 12.5L C-13 1999-2004 14.6L C-15 2005-2010 15.2L C-15 ACERT 1999-2003 15.8L C-16  Not available for sale in the state of California Click here to read Emissions Notice.