Product Description
Interstate-McBee M-3802421 Piston Ring Set (Standard) – 89–98 5.9L Cummins 12-Valve
OE-style standard bore piston ring set for 1989–1998 Dodge Ram 2500/3500 5.9L Cummins 12-valve (6BT). Built to OEM-equivalent specs for reliable sealing, proper oil control, and long service intervals.
- Application-correct: Designed for 5.9L Cummins 6BT (12-valve) truck engines (1989–1998).
- Standard bore size: 102.0 mm (4.016") cylinder bore (STD).
- Sold per piston: One set services one piston—order 6 sets for a complete engine.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.
Specifications
| Brand / Part No. | Interstate-McBee M-3802421 |
|---|---|
| OEM Cross-Reference | Cummins 3802421 (select B-Series) |
| Additional Cross-Refs | 3802050, 3802056, 3802230, 3802746 |
| Engine Family | Cummins B-Series (focus: 6BT 5.9L 12-valve) |
| Bore Size | Standard (STD) — 102.0 mm / 4.016" |
| Quantity | Per piston set (6 required for full engine) |
Vehicle Fitment
Best practice: verify by engine serial number (ESN) if your build is non-stock.
- Dodge Ram 2500 / 3500 — 1989–1998 with 5.9L Cummins 12-valve (6BT)
Note: This ring set is also referenced for select 4B/6B industrial B-Series applications; truck fitment above is the primary focus of this listing.
Installation Tips
- Measure bores and confirm STD sizing; hone/deglaze as required and check end-gap.
- Stagger ring gaps per service manual; observe top/second ring orientation markings.
- Follow Cummins torque specs and clean-room practices during assembly.
Warranty
Interstate-McBee new engine components include manufacturer warranty coverage. Contact us for specific term details on ring sets.
Why Buy From CPP Diesel
- Diesel-specialist support with ESN-verified fitment assistance.
- Fast shipping and easy returns.
- Strategic inventory of B-Series wear items for one-trip rebuilds.
FAQ
Will these rings fit my 1996 5.9L Cummins?Yes. This listing targets 1989–1998 12-valve 6BT truck applications. Always confirm your engine is standard bore before ordering.
How many sets do I need for a full rebuild?
The kit is sold per piston. You’ll need six (6) sets for a complete engine.
What does “STD” mean?
“STD” indicates standard bore size (102.0 mm / 4.016") as originally manufactured. Oversize rings require matching oversize pistons and machining.
Does this work on 24-valve ISB engines?
This listing is focused on 12-valve (1989–1998). Later ISB 24-valve engines use different ring part numbers.
Product Videos
Custom Field
YEAR 1989-1998
MAKE DODGE
ENGINE 5.9L
