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USD 1199
Part #: BT46511

Bully Dog 46511 Heavy Duty ECM Tuner

1998-2019 Cummins ISX, ISM, ISL, ISC (See Application Guide)
Part #: BT46511
★★★★★ ★★★★★ 1 Reviews
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The Bully Dog 46511 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.

  • 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)
1998-2000 14.9L Cummins N14 
2000-2003 14.9L Cummins ISX CM570 Signature 
1999-2003 10.8L Cummins ISM CM570 
2007-2010 8.3L Cummins ISC 
2010-2016 8.3L Cummins ISC 8.3 
2007-2010 8.9L Cummins ISL 
2010-2016 8.9L Cummins ISL 9
2004-2010 10.8L Cummins ISM
2010-2011 11.9L Cummins ISX 11.9
2011-2016 11.9L Cummins ISX 12
2010-2016 14.9L Cummins ISX 15
2017-2019 14.9L Cummins X15 Power
2004-2007 14.9L Cummins ISX CM870
2008-2010 14.9L Cummins ISX CM871


  • MFG. Number 46511
  • Manufacturer Name Bully Dog Heavy Duty
  • Shipping Weight 5.00 lb.
  • Shipping Length 11 in.
  • Shipping Width 4 in.
  • Shipping Height 14 in.
  • Fuel Type Diesel
  • UPC 681018465113
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
5.0/5 Stars out of 1 Reviews
Worth it. Warranty safe
(Washington state) | February 6th, 2021
My 450hp Cummins with 80,0000lbs was getting out dragged by 105,500 lbs loads up hill. That was embarrassing. I estimate my truck is around 540hp now and 1900ft-lbs of torque. I don’t get out pulled by much at all now. Also I am pulling down an extra .5 mpg on the full chat tune! Worth mentioning the tuner was not found when I returned the truck to stock for multiple warranted dpf issues ( you know how that goes). I have also saved my self a derate by removing a code that was no longer active. Well, well worth it.

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Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.