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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AFE 44-LF002 Pro-Guard D2 Replacement Oil Filter | 1989-2024 RAM 5.9L/6.7L 2500/3500 Cummins
AFE 44-LF002 Pro-Guard D2 Replacement Oil Filter | 1989-2024 RAM 5.9L/6.7L 2500/3500 Cummins

Alligator Performance

AFE 44-LF002 Pro-Guard D2 Replacement Oil Filter | 1989-2024 RAM 5.9L/6.7L 2500/3500 Cummins

$17
AFE 46-50064-B BladeRunner Silicone Radiator Hose Kit | 2003-2009 Dodge RAM 5.9L / 6.7L Cummins
AFE 46-50064-B BladeRunner Silicone Radiator Hose Kit | 2003-2009 Dodge RAM 5.9L / 6.7L Cummins
AFE 46-50064-B BladeRunner Silicone Radiator Hose Kit | 2003-2009 Dodge RAM 5.9L / 6.7L Cummins

AFE Power

AFE 46-50064-B BladeRunner Silicone Radiator Hose Kit | 2003-2009 Dodge RAM 5.9L / 6.7L Cummins

$177
Industrial Injection IIS237603 Pressure Relief Valve Block Off | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Industrial Injection IIS237603 Pressure Relief Valve Block Off | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial Injection IIS237603 Pressure Relief Valve Block Off | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

$47.10
$53
Mishimoto MMOC-RAM-03 Replacement Oil Cooler | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Mishimoto MMOC-RAM-03 Replacement Oil Cooler | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Mishimoto MMOC-RAM-03 Replacement Oil Cooler | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Mishimoto

Mishimoto MMOC-RAM-03 Replacement Oil Cooler | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

$262.95
Wehrli 100241-RAW Billet Individual Runner Intake Manifold | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins
Wehrli 100241-RAW Billet Individual Runner Intake Manifold | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins
Wehrli 100241-RAW Billet Individual Runner Intake Manifold | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins
Wehrli 100241-RAW Billet Individual Runner Intake Manifold | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins
Wehrli 100241-RAW Billet Individual Runner Intake Manifold | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins

Wehrli Custom Fab

Wehrli 100241-RAW Billet Individual Runner Intake Manifold | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L 2500/3500 Cummins

$2,495
Sinister SD-COOLFIL-5.9-03-W Coolant Filtration System | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-COOLFIL-5.9-03-W Coolant Filtration System | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Sinister Diesel

Sinister SD-COOLFIL-5.9-03-W Coolant Filtration System | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

$219.99
S&B 66-2247 Stock Replacement Oiled Filter | 2002-2007 RAM 1500/2500
S&B 66-2247 Stock Replacement Oiled Filter | 2002-2007 RAM 1500/2500

S&B Filters

S&B 66-2247 Stock Replacement Oiled Filter | 2002-2007 RAM 1500/2500

$39.32
Mishimoto MMHOSE-RAM-03DRD Silicone Coolant Hose Kit | 2003-2010 Dodge RAM Cummins
Mishimoto MMHOSE-RAM-03DRD Silicone Coolant Hose Kit | 2003-2010 Dodge RAM Cummins

Mishimoto

Mishimoto MMHOSE-RAM-03DRD Silicone Coolant Hose Kit | 2003-2010 Dodge RAM Cummins

$321.95
Mishimoto MMHOSE-RAM-03DBK Black Silicone Coolant Hose Kit | 2003-2010 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Mishimoto MMHOSE-RAM-03DBK Black Silicone Coolant Hose Kit | 2003-2010 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Mishimoto

Mishimoto MMHOSE-RAM-03DBK Black Silicone Coolant Hose Kit | 2003-2010 Dodge RAM 2500/3500 5.9L/6.7L Cummins

$321.95
Industrial PDM-3672.040 Stock Pistons Kit .040 | 2003-2004 RAM 2500/3500 5.9L Cummins
Industrial PDM-3672.040 Stock Pistons Kit .040 | 2003-2004 RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-3672.040 Stock Pistons Kit .040 | 2003-2004 RAM 2500/3500 5.9L Cummins

$1,342.38
Industrial PDM-3672.020 Stock Pistons Kit .020 | 2003-2004 RAM 2500/3500 5.9L Cummins
Industrial PDM-3672.020 Stock Pistons Kit .020 | 2003-2004 RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-3672.020 Stock Pistons Kit .020 | 2003-2004 RAM 2500/3500 5.9L Cummins

$1,342.38
Industrial PDM-3672 Stock Pistons Kit STD | 2003-2004 RAM 2500/3500 5.9L Cummins
Industrial PDM-3672 Stock Pistons Kit STD | 2003-2004 RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-3672 Stock Pistons Kit STD | 2003-2004 RAM 2500/3500 5.9L Cummins

$1,342.38

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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