It doesn't take much to get big power out of a cummins. The main problem lies in getting the tranny to handle all that power. Just simple adjustments to the motor, along with exhaust mods, intake mods and new injectors and turning the boost up. For example, my old cummins (now GP's) had 185 hp and 400 ftlbs of torque stock. With the Banks stinger pack and AFE intake it should of been bushing about 500 ftlbs on paper. Adjust the injection pump and some other simple adjustment mods and 550 ftlbs would be easy to claim, then throw in some injectors and turn the boost up, you could be pushing over 300 hp and over 700 ftlbs of torque easy.