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

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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Fleece FPE-34657-BLK Upper Fan Pulley Idler Black | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Fleece FPE-34657-BLK Upper Fan Pulley Idler Black | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Fleece FPE-34657-BLK Upper Fan Pulley Idler Black | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Fleece FPE-34657-BLK Upper Fan Pulley Idler Black | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Fleece Performance Products

Fleece FPE-34657-BLK Upper Fan Pulley Idler Black | 2003-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: FLCFPE-34657-BLK
$91.19
Industrial PDM-3672CC Standard Coated & Chamfered Piston Kit w/ Rings | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
Industrial PDM-3672CC Standard Coated & Chamfered Piston Kit w/ Rings | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
Industrial PDM-3672CC Standard Coated & Chamfered Piston Kit w/ Rings | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-3672CC Standard Coated & Chamfered Piston Kit w/ Rings | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

SKU: IISPDM-3672CC
$1,934.13
$2,200
H&S Motorsports 453003 Extended Upper Radiator Hose | 03-07 Dodge RAM 2500/3500 5.9L Cummins
H&S Motorsports 453003 Extended Upper Radiator Hose | 03-07 Dodge RAM 2500/3500 5.9L Cummins

H&S Motorsports

H&S Motorsports 453003 Extended Upper Radiator Hose | 03-07 Dodge RAM 2500/3500 5.9L Cummins

SKU: HSM453003
$159
Fleece FPE-OC-CR-F-RED Cummins Billet Oil Cap Cover Red | 2003-2018 Dodge RAM 5.9L/6.7LCummins
IN STOCK
Fleece FPE-OC-CR-F-RED Cummins Billet Oil Cap Cover Red | 2003-2018 Dodge RAM 5.9L/6.7LCummins
Fleece FPE-OC-CR-F-RED Cummins Billet Oil Cap Cover Red | 2003-2018 Dodge RAM 5.9L/6.7LCummins

Fleece Performance Products

Fleece FPE-OC-CR-F-RED Cummins Billet Oil Cap Cover Red | 2003-2018 Dodge RAM 5.9L/6.7LCummins

SKU: FLCFPE-OC-CR-F-RED
$34.99
Mahle 54556A Victor Reinz 1.20mm Thick Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Mahle 54556A Victor Reinz 1.20mm Thick Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Victor Reinz

Mahle 54556A Victor Reinz 1.20mm Thick Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: MCI54556A
$416.93
Wagler CRD5.9/6.7ST Street Fighter Connecting Rods | 1989-2018 Dodge RAM 2500/3500
Wagler CRD5.9/6.7ST Street Fighter Connecting Rods | 1989-2018 Dodge RAM 2500/3500
Wagler CRD5.9/6.7ST Street Fighter Connecting Rods | 1989-2018 Dodge RAM 2500/3500

Wagler Competition Products

Wagler CRD5.9/6.7ST Street Fighter Connecting Rods | 1989-2018 Dodge RAM 2500/3500

SKU: WCPCRD5.9/6.7ST
$1,950
D&J Precision DJPSB100019 Essential Short Block Engine | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPSB100019 Essential Short Block Engine | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPSB100019 Essential Short Block Engine | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

D&J Precision

D&J Precision DJPSB100019 Essential Short Block Engine | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

SKU: DNJDJPSB100019
$5,669.99
D&J Precision DJPSB100018 Plus Short Block Engine | 2003-2004.5 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPSB100018 Plus Short Block Engine | 2003-2004.5 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPSB100018 Plus Short Block Engine | 2003-2004.5 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPSB100018 Plus Short Block Engine | 2003-2004.5 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPSB100018 Plus Short Block Engine | 2003-2004.5 Dodge RAM 2500/3500 5.9L Cummins

D&J Precision

D&J Precision DJPSB100018 Plus Short Block Engine | 2003-2004.5 Dodge RAM 2500/3500 5.9L Cummins

SKU: DNJDJPSB100018
$6,404.99
ARP 447-1301 SS 12pt Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers
ARP 447-1301 SS 12pt Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers

ARP

ARP 447-1301 SS 12pt Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers

SKU: ARP447-1301
$195.28
ARP 447-1201 SS 12pt Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers/Heat Shield
ARP 447-1201 SS 12pt Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers/Heat Shield

ARP

ARP 447-1201 SS 12pt Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers/Heat Shield

SKU: ARP447-1201
$77.33
ARP 447-1101 SS Hex Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers
ARP 447-1101 SS Hex Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers

ARP

ARP 447-1101 SS Hex Exhaust Manifold Bolt Kit | 2003-2025 Dodge RAM 2500/3500 5.9/6.7L Cummins No Spacers

SKU: ARP447-1101
$74.28
D&J Precision DJPLB100102 Heavy Hauler Ready Run Engine | 2004-2005 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPLB100102 Heavy Hauler Ready Run Engine | 2004-2005 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPLB100102 Heavy Hauler Ready Run Engine | 2004-2005 Dodge RAM 2500/3500 5.9L Cummins
D&J Precision DJPLB100102 Heavy Hauler Ready Run Engine | 2004-2005 Dodge RAM 2500/3500 5.9L Cummins

D&J Precision

D&J Precision DJPLB100102 Heavy Hauler Ready Run Engine | 2004-2005 Dodge RAM 2500/3500 5.9L Cummins

SKU: DNJDJPLB100102
$27,799.99
Hamilton Cams 07-CC-24V188 24 Valve 188/220 Camshaft Combo | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Hamilton Cams 07-CC-24V188 24 Valve 188/220 Camshaft Combo | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Hamilton Cams 07-CC-24V188 24 Valve 188/220 Camshaft Combo | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Hamilton Cams 07-CC-24V188 24 Valve 188/220 Camshaft Combo | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Hamilton Cams 07-CC-24V188 24 Valve 188/220 Camshaft Combo | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Hamilton Cams

Hamilton Cams 07-CC-24V188 24 Valve 188/220 Camshaft Combo | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: HAM07-CC-24V188
$1,349
PPE 218034350 Head Stud Kit - High Yield | 1998.5-2024 RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034350 Head Stud Kit - High Yield | 1998.5-2024 RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034350 Head Stud Kit - High Yield | 1998.5-2024 RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034350 Head Stud Kit - High Yield | 1998.5-2024 RAM 2500/3500 5.9L/6.7L Cummins

PPE

PPE 218034350 Head Stud Kit - High Yield | 1998.5-2024 RAM 2500/3500 5.9L/6.7L Cummins

SKU: PPE218034350
$1,214.99
$1,349.99
Fleece FPE-CUMM-HCL-KIT-9902 Heater Feed and Return Hose Kit | 1998.5-2002 Dodge RAM 2500/3500 5.9L Cummins VP
IN STOCK
Fleece FPE-CUMM-HCL-KIT-9902 Heater Feed and Return Hose Kit | 1998.5-2002 Dodge RAM 2500/3500 5.9L Cummins VP
Fleece FPE-CUMM-HCL-KIT-9902 Heater Feed and Return Hose Kit | 1998.5-2002 Dodge RAM 2500/3500 5.9L Cummins VP

Fleece Performance Products

Fleece FPE-CUMM-HCL-KIT-9902 Heater Feed and Return Hose Kit | 1998.5-2002 Dodge RAM 2500/3500 5.9L Cummins VP

SKU: FLCFPE-CUMM-HCL-KIT-9902
$79.99
$83.99
JEEPCABLES RAMG2-9802-2/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 2/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-2/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 2/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-2/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 2/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-2/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 2/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-2/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 2/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel

JEEPCABLES

JEEPCABLES RAMG2-9802-2/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 2/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel

SKU: JEERAMG2-9802-20G-5.9DIESEL
$365.50
JEEPCABLES RAMG2-9802-1/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 1/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-1/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 1/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-1/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 1/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-1/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 1/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG2-9802-1/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 1/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel

JEEPCABLES

JEEPCABLES RAMG2-9802-1/0G-5.9DIESEL 2nd Gen Battery Cable Kit (Size 1/0 GA) | 1998-2002 Dodge RAM 2500/3500 Cummins Diesel

SKU: JEERAMG2-9802-10G-5.9DIESEL
$305.50
JEEPCABLES RAMG3-0205-1/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 1/0) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
IN STOCK
JEEPCABLES RAMG3-0205-1/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 1/0) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-1/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 1/0) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-1/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 1/0) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-1/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 1/0) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel

JEEPCABLES

JEEPCABLES RAMG3-0205-1/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 1/0) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel

SKU: JEERAMG3-0205-10G-5.9-6.7DIESE
$310.50
DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins

DFC Diesel

DFC Diesel TH590304STAUSOALBHD Tow/Haul HD Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins

SKU: DDUTH590304STAUSOALBHD
$20,702.67
DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins

DFC Diesel

DFC Diesel TH590304STAUSOALB Tow/Haul Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins

SKU: DDUTH590304STAUSOALB
$15,394.77
DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins
DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins

DFC Diesel

DFC Diesel SS590304STAUSOALB Street Series Speed of Air Long Block Crate Engine (STD/Auto) | 2003-2004 Dodge RAM 5.9L Cummins

SKU: DDUSS590304STAUSOALB
$11,171.44
BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 Dodge RAM 2500-3500 5.9L Cummins
BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 Dodge RAM 2500-3500 5.9L Cummins
BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 Dodge RAM 2500-3500 5.9L Cummins

BD Diesel

BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 Dodge RAM 2500-3500 5.9L Cummins

SKU: BDDDJPCH100027
$3,464.99
BD Diesel DJPCH100026 Stage 1 Performance Cylinder Head - with out Fire Ring | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCH100026 Stage 1 Performance Cylinder Head - with out Fire Ring | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCH100026 Stage 1 Performance Cylinder Head - with out Fire Ring | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

BD Diesel

BD Diesel DJPCH100026 Stage 1 Performance Cylinder Head - with out Fire Ring | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: BDDDJPCH100026
$3,149.99
BD Diesel DJPCH100008 Reman Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCH100008 Reman Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCH100008 Reman Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

BD Diesel

BD Diesel DJPCH100008 Reman Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: BDDDJPCH100008
$2,204.99

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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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