Product Description
The CUMMINS 3800784 OEM ENGINE PISTON KIT (.020) is designed for 1998.5–2002 5.9L ISB Cummins diesel engines. This genuine Cummins piston kit provides an OEM-quality replacement piston assembly for engine rebuilds, overhauls, and cylinder restoration requiring a .020-inch oversize piston.
Use this piston kit when repairing cylinder wear, rebuilding a damaged engine, or restoring factory compression and performance. Always verify fitment by engine serial number and piston size requirements before ordering.
FEATURES
- Genuine Cummins OEM piston kit
- .020-inch oversize piston configuration
- Designed for 1998.5–2002 5.9L ISB Cummins engines
- OEM-quality replacement for engine rebuilds and overhauls
- Helps restore proper compression and engine performance
- Engineered to Cummins factory specifications
FITMENT
- 1998.5–2002 Dodge Ram 2500 5.9L Cummins ISB
- 1998.5–2002 Dodge Ram 3500 5.9L Cummins ISB
- Select Cummins ISB 5.9L industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 3800784 OEM Engine Piston Kit (.020 Oversize)
- Piston kit components as supplied by Cummins
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3800784
- Cylinder liner and overhaul service components
- Connecting rod and bearing service parts
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3800784
- Part Type: Engine Piston Kit
- Piston Size: .020 Inch Oversize
- Engine Compatibility: 5.9L ISB Cummins
- Fitment Years: 1998.5–2002
- Vehicle Application: Dodge Ram 2500 / 3500
- Condition: New
- Quantity: Sold Individually
FAQ
Will this part fit my truck?
This piston kit fits the applications listed above. Always verify your engine serial number and required piston size before ordering.
Is this a direct replacement?
Yes. Cummins 3800784 is an OEM piston kit manufactured to Cummins specifications for the listed applications.
What is included?
This listing includes one Cummins 3800784 OEM Engine Piston Kit and associated components supplied by Cummins.
What does .020 oversize mean?
A .020 oversize piston is designed for engines whose cylinders have been machined .020 inch larger than the factory bore size during rebuilding.
Can I use this piston in a standard bore engine?
No. This piston is intended for engines that have been properly machined for a .020-inch oversize piston. Verify bore dimensions before installation.
Do I need any related parts?
Inspect cylinder liners, piston rings, connecting rods, rod bearings, main bearings, and gasket components during engine rebuilding and replace worn parts as necessary.
