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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ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins
ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins
ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins

ARP

ARP 247-4204 Custom Age 625+ Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: ARP247-4204
$1,199.29
$1,399.99
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 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

SKU: EDG84130-3
$511.95
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

SKU: ARP100-9910
$18.13
$34.58
ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
ARP 247-4202 Pro Series Head Stud Kit | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

ARP

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

SKU: ARP247-4202
$473.13
Edge 98620 EAS Starter Kit with EGT Cable | Universal
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

SKU: EDG98620
$191.95
ARP 100-9911 Ultra-Torque Fastener Assembly Lubricant (20 oz) | Universal
ARP 100-9911 Ultra-Torque Fastener Assembly Lubricant (20 oz) | Universal
ARP 100-9911 Ultra-Torque Fastener Assembly Lubricant (20 oz) | Universal
ARP 100-9911 Ultra-Torque Fastener Assembly Lubricant (20 oz) | Universal

ARP

ARP 100-9911 Ultra-Torque Fastener Assembly Lubricant (20 oz) | Universal

SKU: ARP100-9911
$27.26
$52.01
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

SKU: EFIACV3
$595
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

SKU: ARP247-5401
$242.44
$462.41
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

SKU: SMASJ-06
$495
Gator Fasteners HSK5967C Head Stud Kit | 1998.5-2025 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Gator Fasteners HSK5967C Head Stud Kit | 1998.5-2025 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Gator Fasteners

Gator Fasteners HSK5967C Head Stud Kit | 1998.5-2025 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: GTFHSK5967C
$424.99
$449.99
Fleece FPE-CLNTBYPS-CR-ORING-KIT Replacement O-ring Kit for Cummins Coolant Bypass Kits | 1994-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Fleece FPE-CLNTBYPS-CR-ORING-KIT Replacement O-ring Kit for Cummins Coolant Bypass Kits | 1994-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Fleece FPE-CLNTBYPS-CR-ORING-KIT Replacement O-ring Kit for Cummins Coolant Bypass Kits | 1994-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Fleece FPE-CLNTBYPS-CR-ORING-KIT Replacement O-ring Kit for Cummins Coolant Bypass Kits | 1994-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Fleece Performance Products

Fleece FPE-CLNTBYPS-CR-ORING-KIT Replacement O-ring Kit for Cummins Coolant Bypass Kits | 1994-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: FLCFPE-CLNTBYPS-CR-ORING-KIT
$9.45
ARP 147-2502 Balancer 12V/24V Bolt Kit | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins
ARP 147-2502 Balancer 12V/24V Bolt Kit | 1989-2007 Dodge RAM 2500/3500 5.9L Cummins

ARP

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

SKU: ARP147-2502
$35.01
$66.79
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins MADS
Smarty S2G Touch Programmer | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins MADS

Smarty

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

SKU: SMAS2G
$865
Mahle HS54557 1.28mm Thicker Head Gasket Kit | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Mahle HS54557 1.28mm Thicker Head Gasket Kit | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Mahle

Mahle HS54557 1.28mm Thicker Head Gasket Kit | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: MCIHS54557
$291.02
ARP 247-5403 Main Stud Kit | 2004-2007 Dodge RAM 2500/3500 5.9L Cummins
ARP 247-5403 Main Stud Kit | 2004-2007 Dodge RAM 2500/3500 5.9L Cummins

ARP

ARP 247-5403 Main Stud Kit | 2004-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: ARP247-5403
$252.64
$481.87
Fluidampr 920301 Internal Balance Steel Black Zinc Finish O.D. 9-1/4 In. Performance Damper | 2003-2009 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fluidampr 920301 Internal Balance Steel Black Zinc Finish O.D. 9-1/4 In. Performance Damper | 2003-2009 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fluidampr

Fluidampr 920301 Internal Balance Steel Black Zinc Finish O.D. 9-1/4 In. Performance Damper | 2003-2009 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: FLU920301
$643.31
Smarty PYROKIT Touch EGT Probe | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Smarty PYROKIT Touch EGT Probe | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Smarty PYROKIT Touch EGT Probe | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Smarty

Smarty PYROKIT Touch EGT Probe | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: SMAPYROKIT
$158
Smarty S-06POD Tuner | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MADS
Smarty S-06POD Tuner | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MADS

Smarty

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

SKU: SMAS-06POD
$685
Fleece FPE-CLNTBYPS-CUMMINS-MAN-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MT
Fleece FPE-CLNTBYPS-CUMMINS-MAN-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MT
Fleece FPE-CLNTBYPS-CUMMINS-MAN-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MT
Fleece FPE-CLNTBYPS-CUMMINS-MAN-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MT
Fleece FPE-CLNTBYPS-CUMMINS-MAN-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MT

Fleece Performance Products

Fleece FPE-CLNTBYPS-CUMMINS-MAN-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins MT

SKU: FLCFPE-CLNTBYPS-CUMMINS-MAN-SS
$359
PPE 218034300 Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034300 Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034300 Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034300 Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins
PPE 218034300 Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins

PPE

PPE 218034300 Head Stud Kit | 1998.5-2024 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: PPE218034300
$413.99
Hamilton Cams 07-S-003 Hamilton Cams Valve Springs | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Hamilton Cams 07-S-003 Hamilton Cams Valve Springs | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins
Hamilton Cams 07-S-003 Hamilton Cams Valve Springs | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

Hamilton Cams

Hamilton Cams 07-S-003 Hamilton Cams Valve Springs | 1998.5-2018 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: HAM07-S-003
$349
Hamilton Cams 07-C-001 Zinc Additive Break In Lubricant for Hamilton Cam Shafts
Hamilton Cams 07-C-001 Zinc Additive Break In Lubricant for Hamilton Cam Shafts

Hamilton Cams

Hamilton Cams 07-C-001 Zinc Additive Break In Lubricant for Hamilton Cam Shafts

SKU: HAM07-C-001
$15.99
Wehrli 100678 Upper Coolant Pipe | 2003-2009 Dodge Ram 2500/3500 5.9L Cummins
Wehrli 100678 Upper Coolant Pipe | 2003-2009 Dodge Ram 2500/3500 5.9L Cummins
Wehrli 100678 Upper Coolant Pipe | 2003-2009 Dodge Ram 2500/3500 5.9L Cummins
Wehrli 100678 Upper Coolant Pipe | 2003-2009 Dodge Ram 2500/3500 5.9L Cummins
Wehrli 100678 Upper Coolant Pipe | 2003-2009 Dodge Ram 2500/3500 5.9L Cummins

Wehrli Custom Fab

Wehrli 100678 Upper Coolant Pipe | 2003-2009 Dodge Ram 2500/3500 5.9L Cummins

SKU: WCF100678-GB
From $155.20
aFe 46-52061 BladeRunner Street Series Radiator | 2003-2009 Dodge RAM 2500/3500 5.9L Cummins
aFe 46-52061 BladeRunner Street Series Radiator | 2003-2009 Dodge RAM 2500/3500 5.9L Cummins
aFe 46-52061 BladeRunner Street Series Radiator | 2003-2009 Dodge RAM 2500/3500 5.9L Cummins
aFe 46-52061 BladeRunner Street Series Radiator | 2003-2009 Dodge RAM 2500/3500 5.9L Cummins
aFe 46-52061 BladeRunner Street Series Radiator | 2003-2009 Dodge RAM 2500/3500 5.9L Cummins

AFE Power

aFe 46-52061 BladeRunner Street Series Radiator | 2003-2009 Dodge RAM 2500/3500 5.9L Cummins

SKU: AFE46-52061
$689.85

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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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