The 12300 Performance Module fits 5.9L Dodge Cummins trucks from 1998 thru 2002 with VP44 pump.  This diesel performance module is designed for fuel economy with up to 30% increase in hp and fuel savings up to 10%-20%. Adjustable with a 3 position switch you can adjust the power on the fly, Stock, +30HP,  & +60HP. The module doesn’t flash the ECM, instead it receives the data from the ECM, optimizes the signal to the engine improving the fuel efficiency and power. These savings ensure a quick return on investment so you can enjoy greater efficiency and less cost. Plug-and-play connectivity means there’s no need to cut, splice or modify engine wiring.  All Ag Diesel Solutions modules are Made in the U.S.A.