Hypertech 52009 Max Energy Power Programmer for 2007-2009 Dodge 6.7L and 2008 Dodge 5.9L Cummins Diesel 3-Stage power tuning; tow safe in all power levels up to maximum GCWR Adjustable top speed limiter (not available on all vehicles) Speedometer/odometer recalibration for non-stock tires and rear end gears (not available on all vehicles) Reads and clears Diagnostic Trouble Codes (DTC's)