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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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

$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

$85.49
DuramaxTuner DT1202040101000 Smarty UDC Tuning incl MM3 Hardware | 2003-2007 RAM 2500/3500 5.9L Cummins
DuramaxTuner DT1202040101000 Smarty UDC Tuning incl MM3 Hardware | 2003-2007 RAM 2500/3500 5.9L Cummins

Duramax Tuner

DuramaxTuner DT1202040101000 Smarty UDC Tuning incl MM3 Hardware | 2003-2007 RAM 2500/3500 5.9L Cummins

$1,230
H&S Motorsports 453003 Extended Upper Radiator Hose | 03-07 RAM 2500/3500 5.9L Cummins
H&S Motorsports 453003 Extended Upper Radiator Hose | 03-07 RAM 2500/3500 5.9L Cummins

H&S Motorsports

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

$159
PPE 218002000 Head Stud Kit | 2003-2007 RAM 2500/3500 5.9L Cummins
PPE 218002000 Head Stud Kit | 2003-2007 RAM 2500/3500 5.9L Cummins

PPE

PPE 218002000 Head Stud Kit | 2003-2007 RAM 2500/3500 5.9L Cummins

$548.99
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

$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

$416.93
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

$608.99
BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 RAM 2500-3500 5.9L Cummins
BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 RAM 2500-3500 5.9L Cummins
BD Diesel DJPCH100027 Stage 1 Performance Cylinder Head w/ Fire Ring | 2003-2007 RAM 2500-3500 5.9L Cummins

BD Diesel

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

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

BD Diesel

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

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

BD Diesel

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

$2,204.99
Banks 66412 AutoMind 2 Hand-Held Flash Programmer | 2004-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Banks 66412 AutoMind 2 Hand-Held Flash Programmer | 2004-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Banks 66412 AutoMind 2 Hand-Held Flash Programmer | 2004-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins
Banks 66412 AutoMind 2 Hand-Held Flash Programmer | 2004-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

Banks Power

Banks 66412 AutoMind 2 Hand-Held Flash Programmer | 2004-2012 Dodge RAM 5.9L/6.7L 2500/3500 Cummins

$439

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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