2003-2004 Ram 2500/3500 5.9L Cummins Fuel System & Fuel Upgrades

The 2003-2004 Ram 5.9L Cummins is a powerful engine that is capable of putting out immense power. With our selection of Fuel System and Fuel Upgrades you can improve your fuel efficiency and fuel economy with the featured fuel upgrades found here at Alligator Performance. From modified CP3s, enhanced fuel injection lines, lift pumps, and over injectors, there are a treasure trove of items here that will have that 5.9L running in its prime form. Harness even more performance out of that impressive 5.9L by grabbing and installing a new set of over injectors or make your engine run better with a 150GPH lift pump! Check out our selection of Engine Upgrades to pair with your new Fuel Upgrades. Ram Cummins Fitments: 2003, 2004 Ram 5.9L Cummins. Submodel Fitments: Tradesman, Laramie, Laramie Longhorn, Big Horn, Limited, Lone Star, Power Wagon. Some exceptions apply, please see individual product pages for specific fitments.