’03-07 5.9L CUMMINS (COMMON-RAIL)
MAX HORSEPOWER: 480-500 HP TUNING: SMARTY OR EFI LIVE
Even though ’03-05 Rams aren’t supported by EFI Live due to their SCI communication system (vs. CAN bus being employed on ’06-07 trucks), thanks to MADS Electronics (Smarty) software the early common-rail 5.9Ls can still make similar power as later versions. With either tuning platform, knocking on the door or even surpassing 500 hp is possible. We’ve seen six-speed trucks dyno 495 hp with nothing more than custom tuning and a clutch upgrade. We’ve also seen Dodges equipped with built 48RES clear 490 hp.