BD offers the X-Power Ram performance module for 2003 and newer Dodge 5.9-liter diesels. The X-Power achieves performance gains of up to 130 hp and 240 lb-ft of torque by altering the duration and timing of the injection pulse, according to the company. X-Power features four adjustable preset power levels, and a power dial is included. Check with your state regarding legality.
BD Diesel Performance, (800) 887-5030, bddieselperformance.com.