Edge EZ Engine Control Module (ECM) - 03-04 Dodge Ram 2500-3500 5.9L - 30203 The Edge EZ Engine Control Module (ECM) is an add-on module to your factory ECM that delivers additional tuning features not available on a stock engine. This ECM module connects to your factory ECM to optimize its settings. Specifications: Fits 2003 - 2004 Dodge Ram 2500-3500 with 5.9L Cummins engine Level 1 power gains: 25 horsepower and 50 lb-ft torque Level 2 power gains: 45 horsepower and 100 lb-ft torque Level 3 power gains: 65 horsepower and 150 lb-ft torque 3 power levels adjustable using the supplied power level selector switch Improves fuel economy (Level 1) Improves throttle response Reduces downshifting when towing or under heavy loads Emissions Information 50-state legal (C.A.R.B. No.:: D-541-18)