Product Description
MAHLE / Clevite S42221 is the standard-bore piston ring set for the 1989–2002 5.9L Cummins (4.016" / 102.0 mm bore). Premium construction with a chrome top ring delivers long life, excellent sealing, and controlled oil consumption. Sold per cylinder — order six sets for a full engine.
- Application: 5.9L Cummins B-Series (12-valve 1989–1998, 24-valve 1998.5–2002)
- Bore/Size: Standard (4.016" / 102.0 mm)
- Top Ring: Premium ceramic chrome
- Configuration: Complete ring pack per cylinder
- Quality: OE-level materials and geometry
Fitment
- 1989–1993 Dodge Ram 2500/3500, 5.9L Cummins 12V
- 1994–1998 Dodge Ram 2500/3500, 5.9L Cummins 12V
- 1998.5–2002 Dodge Ram 2500/3500, 5.9L Cummins 24V (ISB)
Cross Reference / Related Sizes
- MAHLE/Clevite: S42221 (STD), S42221.020 (+0.50 mm), S42221.040 (+1.00 mm)
- Interchanges: Often cataloged as “Single Cylinder; Chrome Top Ring” in retail catalogs
What’s Included
One complete piston ring set for a single cylinder (top, second, oil ring assembly). Six required for full engine service.
FAQ
Is this sold as a full engine set?
No — S42221 is per cylinder. You’ll need six sets for a complete 6BT/ISB engine.
What is the bore size this fits?
Standard 4.016" (102.0 mm) 5.9L Cummins bore.
Will these rings work on both 12-valve and 24-valve 5.9?
Yes — they fit 1989–1998 12V and 1998.5–2002 24V 5.9L Cummins engines.
Do these have a chrome top ring?
Yes — the top compression ring is premium chrome for durability.
