Product Description
The CUMMINS 4089181 OEM PISTON RING SET (.020 OVER) is designed for 2003–2007 5.9L ISB Cummins diesel engines that have been machined .020-inch oversize during engine rebuilding. This genuine Cummins piston ring set is engineered to provide proper cylinder sealing, oil control, compression retention, and long-term engine performance.
Use this piston ring set when rebuilding an engine with .020-inch oversize pistons and cylinders. Always verify engine specifications, bore size, and part numbers before ordering.
FEATURES
- Genuine Cummins OEM piston ring set
- Designed for .020-inch oversize bore applications
- Fits 2003–2007 5.9L ISB common rail Cummins engines
- Helps restore compression and oil control
- Manufactured to Cummins OE specifications
- Ideal for engine overhaul and rebuild projects
FITMENT
- 2003–2007 Dodge Ram 2500 5.9L Cummins
- 2003–2007 Dodge Ram 3500 5.9L Cummins
- Select 5.9L ISB industrial and commercial Cummins applications
- For engines machined .020-inch oversize
WHAT'S INCLUDED
- 1 Cummins 4089181 OEM Piston Ring Set (.020 Over)
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4089181
- .020 Over 5.9L ISB pistons
- Cylinder liner and overhaul components
- Main bearings, rod bearings, and gasket sets
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4089181
- Part Type: Piston Ring Set
- Oversize: .020 Inch Over
- Engine Compatibility: 5.9L ISB Cummins
- Fitment Years: 2003–2007
- Vehicle Application: Dodge Ram 2500 / 3500
- Condition: New OEM Cummins
- Quantity: Sold as One Ring Set
FAQ
Will this part fit my truck?
This piston ring set fits 2003–2007 5.9L ISB Cummins engines that have been machined .020-inch oversize. Verify engine measurements and part numbers before ordering.
What does .020 over mean?
.020 over means the engine cylinders have been machined 0.020 inches larger than the original factory bore size and require matching oversized pistons and rings.
Is this a genuine Cummins part?
Yes. Cummins 4089181 is a genuine OEM piston ring set manufactured to Cummins specifications.
What is included?
This listing includes one Cummins 4089181 OEM piston ring set for a .020-inch overbore application.
Can I use these rings with standard-size pistons?
No. These rings are designed specifically for .020-inch oversize piston and cylinder bore combinations.
Do I need any related parts?
Inspect pistons, cylinder walls, bearings, gaskets, liners, and other engine rebuild components during installation and replace worn parts as necessary.
