’03-07 5.9L CUM­MINS (COM­MON-RAIL)

Diesel World - - Buyer's Guide -

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.

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