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  1. Home
  2. Ram Cummins
  3. 2003-2004 Ram 5.9L Cummins
  4. Engine & Performance

2003-2004 Ram 5.9L Cummins Engine Upgrades

If you're still running with the old, but faithful 2003-2004 Dodge 5.9L Cummins engine, you'll know a thing or two about taking care of what's yours. Be sure to continuously make that 5.9L Cummins engine on your Ram 2500 and Ram 3500 run efficiently with any of our featured engine and performance upgrades! Give your engine a new set of lungs with a new durable cold air intake system with reusable filter media. Pull out more performance power with a new aftermarket tuner! Achieve stellar acceleration off the line with a turbocharger. Whatever your plan, you can find a number of engine upgrades available for you here at Alligator Performance. 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.

  • Cold Air Intakes Cold Air Intakes
  • Tuners Tuners
  • Cooling Upgrades Cooling Upgrades

Products [41]

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Item In Cart Edge Products Insight CTS3 5
Edge Products Insight CTS3 5" Touch Screen Digital Gauge Monitor
In Stock. Ships in 1 Business Day!
(1)
$462.95
View Details
Item In Cart 03-07 Dodge 5.9L Cummins 2500 / 3500 S&B Cold Air Intake w/ Oiled Filter
03-07 Dodge 5.9L Cummins 2500 / 3500 S&B Cold Air Intake w/ Oiled Filter
In Stock. Ships in 1 Business Day!
$349.00
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Item In Cart 03-07 Dodge 5.9L Cummins 2500 / 3500 S&B Cold Air Intake w/ Dry Filter
03-07 Dodge 5.9L Cummins 2500 / 3500 S&B Cold Air Intake w/ Dry Filter
In Stock. Ships in 1 Business Day!
$349.00
View Details
Item In Cart 03-18 Dodge Ram 2500 / 3500 5.9L/6.7L Cummins BD Killer Frost Plug Plate
03-18 Dodge Ram 2500 / 3500 5.9L/6.7L Cummins BD Killer Frost Plug Plate
In Stock. Ships in 1 Business Day!
$60.95
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Item In Cart 03-07 Dodge Ram 2500 3500 5.9L Cummins BD X-Flow Power Intake Elbow
03-07 Dodge Ram 2500 3500 5.9L Cummins BD X-Flow Power Intake Elbow
In Stock. Ships in 1 Business Day!
$269.95
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Item In Cart 94-04 Ram 5.9L Cummins 2500 / 3500 Accelerator Pedal Position Noise Isolator
94-04 Ram 5.9L Cummins 2500 / 3500 Accelerator Pedal Position Noise Isolator
In Stock. Ships in 1 Business Day!
$33.95
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Item In Cart 03-07 Ram 5.9L Cummins 2500 / 3500 Banks Monster-Ram Intake System
03-07 Ram 5.9L Cummins 2500 / 3500 Banks Monster-Ram Intake System
In Stock. Ships in 1 Business Day!
$498.00
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Item In Cart Banks 55222 Exhaust Brake | 03-04 Dodge 5.9L Cummins 2500 / 3500
Banks 55222 Exhaust Brake | 03-04 Dodge 5.9L Cummins 2500 / 3500
- Ships in 3-5 Business Days
$1,469.00
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Item In Cart 03-09 Ram 5.9L & 6.7L Cummins Mishimoto Intercooler
03-09 Ram 5.9L & 6.7L Cummins Mishimoto Intercooler
In Stock. Ships in 1 Business Day!
$1,220.95
View Details
Item In Cart Fleece FPE-OC-CR-F Cummins Billet Oil Cap Cover Black | 03-18 Dodge Ram Cummins
Fleece FPE-OC-CR-F Cummins Billet Oil Cap Cover Black | 03-18 Dodge Ram Cummins
In Stock. Ships in 1 Business Day!
$34.99
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Item In Cart 03-18 Ram Cummins Fleece Billet Oil Cap Cover - Blue
03-18 Ram Cummins Fleece Billet Oil Cap Cover - Blue
- Ships in 3-5 Business Days
$34.99
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Item In Cart Fleece FPE-OC-CR-F-ORG Cummins Billet Oil Cap Cover Orange | 03-18 Dodge Ram Cummins
Fleece FPE-OC-CR-F-ORG Cummins Billet Oil Cap Cover Orange | 03-18 Dodge Ram Cummins
- Ships in 3-5 Business Days
$34.99
View Details
Item In Cart Fleece FPE-OC-CR-F-RED Cummins Billet Oil Cap Cover Red | 03-18 Dodge Ram Cummins
Fleece FPE-OC-CR-F-RED Cummins Billet Oil Cap Cover Red | 03-18 Dodge Ram Cummins
- Ships in 3-5 Business Days
$34.99
View Details
Item In Cart 03-07 Dodge Ram 2500 / 3500 5.9L Cummins PacBrake HP10016 Remote Oil Filter Relocation Kit
03-07 Dodge Ram 2500 / 3500 5.9L Cummins PacBrake HP10016 Remote Oil Filter Relocation Kit
In Stock. Ships in 1 Business Day!
$262.85
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Item In Cart 03-07 Dodge Ram 2500 / 3500 5.9L Cummins MADS Smarty Junior Tuner SJ-06
03-07 Dodge Ram 2500 / 3500 5.9L Cummins MADS Smarty Junior Tuner SJ-06
- Ships in 3-5 Business Days
$495.00
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Item In Cart 98.5-18 Dodge Cummins Mads Smarty Touch Programmer
98.5-18 Dodge Cummins Mads Smarty Touch Programmer
In Stock. Ships in 1 Business Day!
$865.00
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Item In Cart 89-97 Ram 5.9L Cummins 2500 / 3500 ARP Main Stud Kit
89-97 Ram 5.9L Cummins 2500 / 3500 ARP Main Stud Kit
In Stock. Ships in 1 Business Day!
$347.74
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Item In Cart ATS 2049202272 T3 2 Piece Pulse Flow Exhaust Manifold Kit | 03-07 Dodge Ram 5.9L Cummins 2500 / 3500
ATS 2049202272 T3 2 Piece Pulse Flow Exhaust Manifold Kit | 03-07 Dodge Ram 5.9L Cummins 2500 / 3500
In Stock. Ships in 1 Business Day!
$525.00
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Item In Cart Transfer Flow 0800116206 40 Gallon Refueling Tank System
Transfer Flow 0800116206 40 Gallon Refueling Tank System
- Call 208-719-7400 for Availablity
$1,790.87
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Item In Cart Transfer Flow 50 Gallon Refueling Tank System 0800109417 | Universal Trucks
Transfer Flow 50 Gallon Refueling Tank System 0800109417 | Universal Trucks
- Call 208-719-7400 for Availablity
$1,687.64
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Item In Cart Transfer Flow 0800109420 82 Gallon Refueling Tank System | Universal Trucks
Transfer Flow 0800109420 82 Gallon Refueling Tank System | Universal Trucks
- Call 208-719-7400 for Availablity
$1,914.06
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Item In Cart 98.5-21 Dodge Ram Cummins Gator Head Stud Kit
98.5-21 Dodge Ram Cummins Gator Head Stud Kit
In Stock. Ships in 1 Business Day!
(1)
$399.99
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Item In Cart 03-07 Dodge 5.9L Cummins 2500 / 3500 Wehrli 3.5
03-07 Dodge 5.9L Cummins 2500 / 3500 Wehrli 3.5" High Flow Intake & Intercooler Pipe Kit
- Ships in 25-30 Business Day Lead Time.
$513.13
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Item In Cart Wehrli 100346 4
Wehrli 100346 4" Cold Air Intake Kit | 03-07 Dodge 5.9L Cummins 2500 / 3500
- Ships in 25-30 Business Day Lead Time.
$367.63
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Item In Cart Wehrli 100359 3
Wehrli 100359 3" Drivers Cold Side Intercooler Pipe | 03-07 Dodge 5.9L Cummins 2500 / 3500
- Ships in 25-30 Business Day Lead Time.
$193.03
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Item In Cart 98.5-21 Dodge Ram Cummins HSK5967C-CS Competition 625 Series Head Stud Kit
98.5-21 Dodge Ram Cummins HSK5967C-CS Competition 625 Series Head Stud Kit
- please call to check availability
$1,289.99
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Item In Cart DuramaxTuner DT1202040101000 Smarty UDC Tuning incl MM3 Hardware | 03-07 Dodge Ram 5.9L Cummins 2500 / 3500
DuramaxTuner DT1202040101000 Smarty UDC Tuning incl MM3 Hardware | 03-07 Dodge Ram 5.9L Cummins 2500 / 3500
- Ships in 3-5 Business Days
$1,230.00
View Details
Item In Cart Fleece FPE-FC-1316-BLK Black Anodized Billet Fuel Cap | 03-18 Dodge Ram Cummins
Fleece FPE-FC-1316-BLK Black Anodized Billet Fuel Cap | 03-18 Dodge Ram Cummins
- Ships in 3-5 Business Days
$37.14
View Details
Item In Cart PacBrake HP10174 Universal Mounting Remote Oil Filter Kit For Cummins Engines with Filter Thread of 1 1/8 inch x 16 UN
PacBrake HP10174 Universal Mounting Remote Oil Filter Kit For Cummins Engines with Filter Thread of 1 1/8 inch x 16 UN
In Stock. Ships in 1 Business Day!
$262.85
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Item In Cart 98-02 Ram 5.9L Cummins 2500 / 3500 Mahle H-Series Rod Bearing
98-02 Ram 5.9L Cummins 2500 / 3500 Mahle H-Series Rod Bearing
In Stock. Ships in 1 Business Day!
$48.49
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Item In Cart 03-18 Dodge Ram 5.9L/6.7L Cummins 2500 / 3500  Wehrli Billet Individual Runner Intake Manifold
03-18 Dodge Ram 5.9L/6.7L Cummins 2500 / 3500 Wehrli Billet Individual Runner Intake Manifold
- Ships in 25-30 Business Day Lead Time.
$2,420.15
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Item In Cart 03-07 Dodge Ram 2500 / 3500 5.9L Cummins Wehrli Stage 1 Intake Bundle Kit 100329
03-07 Dodge Ram 2500 / 3500 5.9L Cummins Wehrli Stage 1 Intake Bundle Kit 100329
- Ships in 25-30 Business Day Lead Time.
$707.13
View Details
Item In Cart 98-02 Ram 5.9L Cummins 2500 / 3500 Mahle H-Series Rod Bearing (.001
98-02 Ram 5.9L Cummins 2500 / 3500 Mahle H-Series Rod Bearing (.001" Extra Oil Clearance)
In Stock. Ships in 1 Business Day!
$50.64
View Details
Item In Cart 03-09 Dodge 2500 / 3500 5.9L Cummins aFe BladeRunner Street Series Radiator 46-52061
03-09 Dodge 2500 / 3500 5.9L Cummins aFe BladeRunner Street Series Radiator 46-52061
- Ships in 3-5 Business Days
$583.80
View Details
Item In Cart 03-07 Dodge 2500 / 3500 5.9L Cummins aFe BladeRunner GT Series Intercooler 50 States Legal 46-20011
03-07 Dodge 2500 / 3500 5.9L Cummins aFe BladeRunner GT Series Intercooler 50 States Legal 46-20011
- Ships in 3-5 Business Days
$1,781.35
View Details
Item In Cart 03-09 Dodge Ram 2500 / 3500 5.9L Cummins Wehrli Upper Coolant Pipe WCF100678
03-09 Dodge Ram 2500 / 3500 5.9L Cummins Wehrli Upper Coolant Pipe WCF100678
- Ships in 25-30 Business Day Lead Time.
$144.53
View Details
Item In Cart 03-07 Dodge Ram 2500 / 3500 5.9L Cummins Wehrli Stage 2 Intake Bundle Kit WCF100680
03-07 Dodge Ram 2500 / 3500 5.9L Cummins Wehrli Stage 2 Intake Bundle Kit WCF100680
- Ships in 25-30 Business Day Lead Time.
$1,085.43
View Details
Item In Cart 03-07 Dodge 2500 / 3500 5.9L Cummins Wehrli 3
03-07 Dodge 2500 / 3500 5.9L Cummins Wehrli 3" Passenger Hot Side Intercooler Pipe Kit WCF100544
- Ships in 25-30 Business Day Lead Time.
$202.73
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Item In Cart Industrial 4089183 020 24 Valve | 03-04 020 Oversized Pistons W Rings Oem Cummins Full Set
Industrial 4089183 020 24 Valve | 03-04 020 Oversized Pistons W Rings Oem Cummins Full Set
- Ships in 3-5 Business Days
$1,175.00
View Details
Item In Cart Industrial 4089184 040 24 Valve | 03-04 040 Oversized Pistons W Rings Oem Cummins Full Set
Industrial 4089184 040 24 Valve | 03-04 040 Oversized Pistons W Rings Oem Cummins Full Set
- Ships in 3-5 Business Days
$1,175.00
View Details
Item In Cart Industrial Iis408925Cc 24 Valve | 03-04 Std Piston W Rings Oem Cummins Coated Chamfered
Industrial Iis408925Cc 24 Valve | 03-04 Std Piston W Rings Oem Cummins Coated Chamfered
- Ships in 3-5 Business Days
$270.00
View Details
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