Product Description
The CUMMINS 4089258 OEM PISTON RING SET (STANDARD) is designed for 2004.5–2007 ISB 5.9L Cummins diesel engines. This genuine Cummins piston ring set is engineered to restore proper cylinder sealing, compression, oil control, and engine performance during overhaul or rebuild procedures.
Use this part when rebuilding a 5.9L Cummins engine, replacing worn piston rings, correcting excessive oil consumption, or restoring factory compression. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM piston ring set
- Standard-size piston ring package
- Designed for 2004.5–2007 ISB 5.9L Cummins engines
- Helps restore proper compression and oil control
- Recommended for engine rebuilds and overhauls
- Built to Cummins OEM specifications
FITMENT
- 2004.5–2007 Dodge Ram 2500 5.9L Cummins
- 2004.5–2007 Dodge Ram 3500 5.9L Cummins
- Select Cummins ISB 5.9L industrial applications
WHAT'S INCLUDED
- 1 Cummins 4089258 Standard Piston Ring Set
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 4089258
- OEM Cummins pistons
- Cylinder liner and engine overhaul components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 4089258
- Part Type: Piston Ring Set
- Ring Size: Standard
- Engine Compatibility: ISB 5.9L Cummins
- Fitment Years: 2004.5–2007
- Vehicle Application: Dodge Ram 2500 and 3500
- Condition: New
- Quantity: Sold as One Ring Set
FAQ
Will this part fit my truck?
This piston ring set fits 2004.5–2007 ISB 5.9L Cummins applications listed above. Always verify fitment using your engine serial number before ordering.
Is this a standard-size piston ring set?
Yes. Cummins 4089258 is a standard-size piston ring set intended for standard-bore piston applications.
What is included?
This listing includes one Cummins 4089258 OEM standard piston ring set.
When should piston rings be replaced?
Piston rings are commonly replaced during engine rebuilds, overhauls, low-compression repairs, or when excessive oil consumption is present.
Can I reuse old piston rings?
No. Piston rings should always be replaced during engine rebuild procedures to ensure proper sealing, compression, and long-term engine performance.
Do I need any related parts?
Inspect the pistons, cylinder walls, rod bearings, liners, gaskets, and related engine components during installation and replace worn parts as necessary.
