2003-2004 Ram 2500/3500 5.9L Cummins Engine & Performance

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2003-2004 5.9L Dodge Ram 2500/3500

2003-2004 Ram 2500/3500 5.9L Cummins Crate Engines

Crate Engines

2003-2004 Ram 2500/3500 5.9L Cummins Gaskets, Gasket Kits & Bearings

Gaskets, Gasket Kits & Bearings

2003-2004 Ram 2500/3500 5.9L Cummins Head Studs & Main Studs

Head Studs & Main Studs

2003-2004 Ram 2500/3500 5.9L Cummins Heads & Valve Train

Heads & Valve Train

2003-2004 Ram 2500/3500 5.9L Cummins Oil Pans

Oil Pans

2003-2004 Ram 2500/3500 5.9L Cummins Radiators & Cooling Upgrades

Radiators & Cooling Upgrades

2003-2004 Ram 2500/3500 5.9L Cummins Rebuild Kits & Internal Parts

Rebuild Kits & Internal Parts

2003-2004 Ram 2500/3500 5.9L Cummins Rods, Pistons, Cams & More

Rods/Pistons/Cams & More

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Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal
5.0
Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal
Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal
Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal
Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal
Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal

Edge Products

Edge 84130-3 Products Insight CTS3 5 Touch Screen Digital Gauge Monitor | Universal

$474.95
ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

ARP

ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

$1,232.29
$2,350.43
ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

ARP

ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

$473.13
$902.42
ARP 100-9910 Ultra-Torque Fastener Assembly Lube (10 oz) | Universal
ARP 100-9910 Ultra-Torque Fastener Assembly Lube (10 oz) | Universal

ARP

ARP 100-9910 Ultra-Torque Fastener Assembly Lube (10 oz) | Universal

$18.13
$34.58
Edge 98620 EAS Starter Kit with EGT Cable | Universal
Edge 98620 EAS Starter Kit with EGT Cable | Universal

Edge Products

Edge 98620 EAS Starter Kit with EGT Cable | Universal

$164.95
ARP 247-5401 Main Stud Kit | 1998.5-2006 Dodge RAM 2500/3500 5.9L Cummins
ARP 247-5401 Main Stud Kit | 1998.5-2006 Dodge RAM 2500/3500 5.9L Cummins

ARP

ARP 247-5401 Main Stud Kit | 1998.5-2006 Dodge RAM 2500/3500 5.9L Cummins

$242.44
$462.41
EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal
EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal
EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal
EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal
EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal
EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal

EFI Live

EFI Live ACV3 Live Blank AC3 AutoCal Device | Universal

$595
Smarty SJ-06 Junior Tuner | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MADS
Smarty SJ-06 Junior Tuner | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MADS

Smarty

Smarty SJ-06 Junior Tuner | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MADS

$495
Gator Fasteners HSK5967C Head Stud Kit | 1998.5-2021 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
5.0
Gator Fasteners HSK5967C Head Stud Kit | 1998.5-2021 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Gator Fasteners

Gator Fasteners HSK5967C Head Stud Kit | 1998.5-2021 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

$399.99
$449.99
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins MADS

Smarty

Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins MADS

$865
ARP 147-2502 Balancer 12V/24V Bolt Kit | 1989-2007 RAM 2500/3500 5.9L Cummins
5.0
ARP 147-2502 Balancer 12V/24V Bolt Kit | 1989-2007 RAM 2500/3500 5.9L Cummins

ARP

ARP 147-2502 Balancer 12V/24V Bolt Kit | 1989-2007 RAM 2500/3500 5.9L Cummins

$35.01
$66.79
Smarty PYROKIT Touch EGT Probe | 1998.5-2018 RAM Cummins
Smarty PYROKIT Touch EGT Probe | 1998.5-2018 RAM Cummins

Smarty

Smarty PYROKIT Touch EGT Probe | 1998.5-2018 RAM Cummins

$158

2003-2004 5.9L Dodge Ram 2500/3500

Power Lift Shop All

If you're looking to turn your 5.9L Cummins into a beast that can handle anything thrown its way, check out our Engine & Performance upgrades!  When it comes to every aspect of performance, from cooling upgrades to free flow pipes and intakes, we've got your truck covered. From tuners & modules, oil pans, valve covers, and even high-performance crate engines, Alligator Performance is sure to have what you need in order to upgrade your Ram 5.9L Cummins. Whether you're looking to add more power, reliability or durability, we have you covered at Alligator Performance. Pair your new engine upgrades with our selection of top tier Turbo 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.

Tuners & Modules
Cooling Upgrades
Head Studs & Main Studs
Oil Pans, Valve Covers & Accessories
Crate Engines & Engine Rebuild Kits

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