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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Cometic PRO3003T-067 ISB CR Top End Gasket Kit MLX Cylinder Head Gasket .067 inch Bore 4.100 inch | 2003-2008 Dodge RAM 2500/3500 5.9L Cummins
Cometic PRO3003T-067 ISB CR Top End Gasket Kit MLX Cylinder Head Gasket .067 inch Bore 4.100 inch | 2003-2008 Dodge RAM 2500/3500 5.9L Cummins

Cometic

Cometic PRO3003T-067 ISB CR Top End Gasket Kit MLX Cylinder Head Gasket .067 inch Bore 4.100 inch | 2003-2008 Dodge RAM 2500/3500 5.9L Cummins

SKU: COMPRO3003T-067
$466.85
$502
SAVE $35.15
Cometic C5597-067 ISB CR MLX Cylinder Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Cometic C5597-067 ISB CR MLX Cylinder Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Cometic

Cometic C5597-067 ISB CR MLX Cylinder Head Gasket | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: COMC5597-067
$230.43
$256.03
SAVE $25.60
BD Diesel 1057650 Top Speed Eliminator | 2000.5-2003 Dodge RAM 2500/3500 5.9L Cummins
BD Diesel 1057650 Top Speed Eliminator | 2000.5-2003 Dodge RAM 2500/3500 5.9L Cummins

BD Diesel

BD Diesel 1057650 Top Speed Eliminator | 2000.5-2003 Dodge RAM 2500/3500 5.9L Cummins

SKU: BDD1057650
$162.95
$172
SAVE $9.05
Industrial 244B01 Engine Installation Gasket Set | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins
Industrial 244B01 Engine Installation Gasket Set | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial 244B01 Engine Installation Gasket Set | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins

SKU: IIS244B01
$343.33
Wehrli 100330 Precision Billet Valve Cover | 2003-2005 Dodge Ram 5.9L Cummins
Wehrli 100330 Precision Billet Valve Cover | 2003-2005 Dodge Ram 5.9L Cummins
Wehrli 100330 Precision Billet Valve Cover | 2003-2005 Dodge Ram 5.9L Cummins
Wehrli 100330 Precision Billet Valve Cover | 2003-2005 Dodge Ram 5.9L Cummins

Wehrli Custom Fab

Wehrli 100330 Precision Billet Valve Cover | 2003-2005 Dodge Ram 5.9L Cummins

SKU: WCF100330-GB
From $745.93
Industrial PAI-CUPISB607-076 PAI Engine Overhaul Kit | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
Industrial PAI-CUPISB607-076 PAI Engine Overhaul Kit | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PAI-CUPISB607-076 PAI Engine Overhaul Kit | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

SKU: IISCUPISB607-076
$1,650.77
$1,665.30
SAVE $14.53
Powerstroke Products PP-24VCRH-L103VS-FR Loaded Cylinder Head with 103LB Springs & Fire-Rings | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Powerstroke Products PP-24VCRH-L103VS-FR Loaded Cylinder Head with 103LB Springs & Fire-Rings | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Powerstroke Products

Powerstroke Products PP-24VCRH-L103VS-FR Loaded Cylinder Head with 103LB Springs & Fire-Rings | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: PWSPP-24VCRH-L103VS-FR
$3,249
Powerstroke Products PP-24VCRH-L103VS Loaded Cylinder Head with 103LB Springs | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Powerstroke Products PP-24VCRH-L103VS Loaded Cylinder Head with 103LB Springs | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Powerstroke Products

Powerstroke Products PP-24VCRH-L103VS Loaded Cylinder Head with 103LB Springs | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: PWSPP-24VCRH-L103VS
$2,499
Powerstroke Products PP-24VCRH-LOEM Loaded OEM Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Powerstroke Products PP-24VCRH-LOEM Loaded OEM Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Powerstroke Products

Powerstroke Products PP-24VCRH-LOEM Loaded OEM Cylinder Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: PWSPP-24VCRH-LOEM
$2,349
Industrial PAI-CUPISB607-101 PAI Engine Overhaul Kit w/.020 Pistons | 2003-2004 Dodge RAM 2500/3500 5.9L 24V Cummins
Industrial PAI-CUPISB607-101 PAI Engine Overhaul Kit w/.020 Pistons | 2003-2004 Dodge RAM 2500/3500 5.9L 24V Cummins

Industrial Injection

Industrial PAI-CUPISB607-101 PAI Engine Overhaul Kit w/.020 Pistons | 2003-2004 Dodge RAM 2500/3500 5.9L 24V Cummins

SKU: IISPAI-CUPISB607-101
$1,827.28
$3,238.90
SAVE $1,411.62
Cometic PRO3003T ISB CR Top End Gasket Kit - 4.100 inch Bore .061 inch | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Cometic PRO3003T ISB CR Top End Gasket Kit - 4.100 inch Bore .061 inch | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Cometic

Cometic PRO3003T ISB CR Top End Gasket Kit - 4.100 inch Bore .061 inch | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: COMPRO3003T
$466.85
$502
SAVE $35.15
Cometic C5597-061 .061 inch MLX Cylinder Head Gasket - 4.100 inch Bore | 03-08 Dodge RAM 2500/3500 5.9L Cummins
Cometic C5597-061 .061 inch MLX Cylinder Head Gasket - 4.100 inch Bore | 03-08 Dodge RAM 2500/3500 5.9L Cummins

Cometic

Cometic C5597-061 .061 inch MLX Cylinder Head Gasket - 4.100 inch Bore | 03-08 Dodge RAM 2500/3500 5.9L Cummins

SKU: COMC5597-061
$230.43
$256.03
SAVE $25.60
Industrial PDM-59STKLB-3HS CR Stock Long Block with ARP Head Studs | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
Industrial PDM-59STKLB-3HS CR Stock Long Block with ARP Head Studs | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-59STKLB-3HS CR Stock Long Block with ARP Head Studs | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

SKU: IISPDM-59STKLB-3HS
$9,426.41
aFe 77-42002 Power Scorcher Tuning Module | 2003-2011 Dodge RAM 2500/3500 5.9L/6.7L Cummins
IN STOCK
aFe 77-42002 Power Scorcher Tuning Module | 2003-2011 Dodge RAM 2500/3500 5.9L/6.7L Cummins
aFe 77-42002 Power Scorcher Tuning Module | 2003-2011 Dodge RAM 2500/3500 5.9L/6.7L Cummins
aFe 77-42002 Power Scorcher Tuning Module | 2003-2011 Dodge RAM 2500/3500 5.9L/6.7L Cummins
aFe 77-42002 Power Scorcher Tuning Module | 2003-2011 Dodge RAM 2500/3500 5.9L/6.7L Cummins

AFE Power

aFe 77-42002 Power Scorcher Tuning Module | 2003-2011 Dodge RAM 2500/3500 5.9L/6.7L Cummins

SKU: AFE77-42002
$473.75
Sinister SD-ALT-5.9-03-320 320 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-320 320 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-320 320 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-320 320 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-320 320 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Sinister Diesel

Sinister SD-ALT-5.9-03-320 320 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: SINSDALT5903320
$839.99
Sinister SD-ALT-5.9-03-240 240 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-240 240 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-240 240 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-240 240 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Sinister SD-ALT-5.9-03-240 240 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Sinister Diesel

Sinister SD-ALT-5.9-03-240 240 Amp High Output Alternator | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: SINSDALT5903240
$743.99
Mahle 2243673WR020 Piston with Rings (.020) | 2005-2007 Dodge RAM 2500/3500 5.9L Cummins
IN STOCK
Mahle 2243673WR020 Piston with Rings (.020) | 2005-2007 Dodge RAM 2500/3500 5.9L Cummins
Mahle 2243673WR020 Piston with Rings (.020) | 2005-2007 Dodge RAM 2500/3500 5.9L Cummins
Mahle 2243673WR020 Piston with Rings (.020) | 2005-2007 Dodge RAM 2500/3500 5.9L Cummins

Mahle

Mahle 2243673WR020 Piston with Rings (.020) | 2005-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: MCI2243673WR020
$196.72
Fleece FPE-CLNTBYPS-CUMMINS-0305-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins AT
Fleece FPE-CLNTBYPS-CUMMINS-0305-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins AT
Fleece FPE-CLNTBYPS-CUMMINS-0305-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins AT
Fleece FPE-CLNTBYPS-CUMMINS-0305-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins AT
Fleece FPE-CLNTBYPS-CUMMINS-0305-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins AT

Fleece Performance Products

Fleece FPE-CLNTBYPS-CUMMINS-0305-SS Coolant Bypass Kit with Stainless Steel Braided Line | 2003-2005 Dodge RAM 2500/3500 5.9L Cummins AT

SKU: FLCFPE-CLNTBYPS-CUMMINS-0305-SS
$359
Fleece FPE-34658-BLK-SPK Upper Fan Idler for use with Electric Water Pumps Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
IN STOCK
Fleece FPE-34658-BLK-SPK Upper Fan Idler for use with Electric Water Pumps Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34658-BLK-SPK Upper Fan Idler for use with Electric Water Pumps Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Fleece FPE-34658-BLK-SPK Upper Fan Idler for use with Electric Water Pumps Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Fleece Performance Products

Fleece FPE-34658-BLK-SPK Upper Fan Idler for use with Electric Water Pumps Black Finish Contract Cut | 2003-2018 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: FLCFPE-34658-BLK-SPK
$113.99
ATS 103-910-2272 Fire Ring Parts Kit | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
ATS 103-910-2272 Fire Ring Parts Kit | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

ATS Diesel Performance

ATS 103-910-2272 Fire Ring Parts Kit | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: ATS103-910-2272
$484.92
Edge 38406 Pillar Pod for CTS3 and Trinity 2 | 2003-2008 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
IN STOCK
Edge 38406 Pillar Pod for CTS3 and Trinity 2 | 2003-2008 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Edge Products

Edge 38406 Pillar Pod for CTS3 and Trinity 2 | 2003-2008 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

SKU: EDG38406
$155.95
$175.95
SAVE $20
Edge 31502-3 Juice with Attitude CTS3 | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins
IN STOCK
Edge 31502-3 Juice with Attitude CTS3 | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

Edge Products

Edge 31502-3 Juice with Attitude CTS3 | 2003-2004 Dodge RAM 2500/3500 5.9L Cummins

SKU: EDG31502-3
$1,449.95
$1,631.95
SAVE $182
Industrial PDM-59STKBB Stock Plus Builder Box | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Industrial PDM-59STKBB Stock Plus Builder Box | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-59STKBB Stock Plus Builder Box | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: IISPDM-59STKBB
$6,644.45
Industrial PDM-59RHC Stage 2 Race Performance Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Industrial PDM-59RHC Stage 2 Race Performance Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins
Industrial PDM-59RHC Stage 2 Race Performance Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

Industrial Injection

Industrial PDM-59RHC Stage 2 Race Performance Head | 2003-2007 Dodge RAM 2500/3500 5.9L Cummins

SKU: IISPDM-59RHC
$6,006.52

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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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