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

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 98611 EAS Expandable Probe | Universal
Edge 98611 EAS Expandable Probe | Universal
Edge 98611 EAS Expandable Probe | Universal
Edge 98611 EAS Expandable Probe | Universal

Edge Products

Edge 98611 EAS Expandable Probe | Universal

SKU: EDG98611
$177.95
$199.95
Edge 98607 0-100 PSIG EAS Pressure Sensor
Edge 98607 0-100 PSIG EAS Pressure Sensor

Edge Products

Edge 98607 0-100 PSIG EAS Pressure Sensor

SKU: EDG98607
$207.95
Edge 98605 5 Volt EAS Sensor Input | Universal
Edge 98605 5 Volt EAS Sensor Input | Universal
Edge 98605 5 Volt EAS Sensor Input | Universal

Edge Products

Edge 98605 5 Volt EAS Sensor Input | Universal

SKU: EDG98605
$240.95
$249.99
Wehrli 100394 Billet Oil Fill Cap Clear Anodized | 1998.5-2024 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Wehrli 100394 Billet Oil Fill Cap Clear Anodized | 1998.5-2024 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Wehrli 100394 Billet Oil Fill Cap Clear Anodized | 1998.5-2024 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Wehrli 100394 Billet Oil Fill Cap Clear Anodized | 1998.5-2024 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Wehrli Custom Fab

Wehrli 100394 Billet Oil Fill Cap Clear Anodized | 1998.5-2024 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: WCF100394
$57.23
Fleece FPE-CLNTBYPS-HS-CRVP-BLK Coolant Bypass Hose - Black Nylon Braided | 1998.5-2018 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CLNTBYPS-HS-CRVP-BLK Coolant Bypass Hose - Black Nylon Braided | 1998.5-2018 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CLNTBYPS-HS-CRVP-BLK Coolant Bypass Hose - Black Nylon Braided | 1998.5-2018 Dodge RAM 2500/3500 5.9L Cummins

Fleece Performance Products

Fleece FPE-CLNTBYPS-HS-CRVP-BLK Coolant Bypass Hose - Black Nylon Braided | 1998.5-2018 Dodge RAM 2500/3500 5.9L Cummins

SKU: FLCFPE-CLNTBYPS-HS-CRVP-BLK
$75.76
Fleece FPE-CUMM-CYLHD-KIT Cylinder Head Dowels | 1989-2023 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-CUMM-CYLHD-KIT Cylinder Head Dowels | 1989-2023 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-CUMM-CYLHD-KIT Cylinder Head Dowels | 1989-2023 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-CUMM-CYLHD-KIT Cylinder Head Dowels | 1989-2023 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fleece Performance Products

Fleece FPE-CUMM-CYLHD-KIT Cylinder Head Dowels | 1989-2023 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: FLCFPE-CUMM-CYLHD-KIT
$20.99
Fleece FPE-CLNTBYPS-HS-HC-0305 Replacement EPDM Cooland Bypass Hose | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CLNTBYPS-HS-HC-0305 Replacement EPDM Cooland Bypass Hose | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins

Fleece Performance Products

Fleece FPE-CLNTBYPS-HS-HC-0305 Replacement EPDM Cooland Bypass Hose | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins

SKU: FLCFPE-CLNTBYPS-HS-HC-0305
$25.99
Fleece FPE-CUMM-HG-5.9-FR Fire Ring Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CUMM-HG-5.9-FR Fire Ring Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CUMM-HG-5.9-FR Fire Ring Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CUMM-HG-5.9-FR Fire Ring Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Fleece FPE-CUMM-HG-5.9-FR Fire Ring Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Fleece Performance Products

Fleece FPE-CUMM-HG-5.9-FR Fire Ring Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: FLCFPE-CUMM-HG-5.9-FR
$339
Mahle S42170 Piston Ring Set | 2004.5-2007 Dodge RAM 2500/3500 5.9L Cummins
Mahle S42170 Piston Ring Set | 2004.5-2007 Dodge RAM 2500/3500 5.9L Cummins

Mahle

Mahle S42170 Piston Ring Set | 2004.5-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: MCIS42170
$31.87
$74.99
Fleece FPE-CLNTBYPS-CUMMINS-SER-Kit Coolant Bypass Service Kit | 1994-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-CLNTBYPS-CUMMINS-SER-Kit Coolant Bypass Service Kit | 1994-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fleece Performance Products

Fleece FPE-CLNTBYPS-CUMMINS-SER-Kit Coolant Bypass Service Kit | 1994-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: FLCFPE-CLNTBYPS-CUMMINS-SER-KIT
$27.99
Fleece FPE-34657-AL Billet Aluminum Upper Fan Pulley Idler | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34657-AL Billet Aluminum Upper Fan Pulley Idler | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fleece Performance Products

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

SKU: FLCFPE-34657-AL
$85.49
Fleece FPE-34657-BLK-SPK Upper Fan Pulley Idler - Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34657-BLK-SPK Upper Fan Pulley Idler - Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34657-BLK-SPK Upper Fan Pulley Idler - Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fleece Performance Products

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

SKU: FLCFPE-34657-BLK-SPK
$113.99
Fleece FPE-34660-AL Fan Drive Pulley Bare Aluminum Finish | 2003-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34660-AL Fan Drive Pulley Bare Aluminum Finish | 2003-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34660-AL Fan Drive Pulley Bare Aluminum Finish | 2003-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34660-AL Fan Drive Pulley Bare Aluminum Finish | 2003-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fleece Performance Products

Fleece FPE-34660-AL Fan Drive Pulley Bare Aluminum Finish | 2003-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: FLCFPE-34660-AL
$85.49
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
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
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 RAMG3-0205-2/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 2/0 GA) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-2/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 2/0 GA) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-2/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 2/0 GA) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-2/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 2/0 GA) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel
JEEPCABLES RAMG3-0205-2/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 2/0 GA) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel

JEEPCABLES

JEEPCABLES RAMG3-0205-2/0G-5.9-6.7DIESEL 3rd Gen Battery Cable Kit (Size 2/0 GA) | 2002-2005 Dodge RAM 2500/3500 Cummins Diesel

SKU: JEERAMG3-0205-20G-5.9-6.7DIESE
$375.50
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
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 DJPCNC100071 Billet Valve Cover Dodge RAM Cummins | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCNC100071 Billet Valve Cover Dodge RAM Cummins | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCNC100071 Billet Valve Cover Dodge RAM Cummins | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel DJPCNC100071 Billet Valve Cover Dodge RAM Cummins | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins

BD Diesel

BD Diesel DJPCNC100071 Billet Valve Cover Dodge RAM Cummins | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins

SKU: BDDDJPCNC100071
$608.99

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2003-2004 5.9L Dodge Ram 2500/3500

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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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Welcome to The Garage – your one-stop shop for all your car care and maintenance needs. From premium oils and filters to top-notch car care products, we have everything you need to keep your vehicle running smoothly and looking its best. Whether you're a DIY enthusiast or a professional mechanic, our carefully curated selection of high-quality products will help you take care of your ride like never before.

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