Product Description
Interstate-McBee M-4089670 Piston Kit .020 – 2004.5–2007 5.9L Cummins (ISB Common Rail)
Restore compression and reliability on your 2004.5–2007 Dodge Ram 5.9L Cummins (24-valve ISB Common Rail) with this .020" (0.50 mm) oversize piston kit from Interstate-McBee. Built to OEM-equivalent specs for drop-in compatibility after proper machine work.
- .020" (0.50 mm) oversize for worn or over-bored cylinders.
- Complete single-cylinder kit: piston, ring set, wrist pin, and pin clips.
- OEM-style design: engineered to match OE performance and durability.
- Sold individually: order six (6) for a full engine set.
Specifications
| Brand / Part | Interstate-McBee M-4089670 |
|---|---|
| Oversize | .020" (0.50 mm) |
| Includes | Piston, ring set, wrist pin, pin clips (per cylinder) |
| Engine | Cummins 5.9L ISB (24-valve Common Rail) |
| Applicable Years | 2004.5–2007 (Dodge Ram 2500/3500) |
| OEM Cross-Ref | Cummins 4089670 (.020"), 4089669 (STD), 4089671 (.040") |
| Related Rings | 4089181 (.020" ring set) |
Vehicle Fitment
Always verify by engine serial number (ESN), CPL, and bowl style if applicable.
- Dodge Ram 2500 / 3500 — 5.9L Cummins (ISB Common Rail)
- Model Years: 2004.5, 2005, 2006, 2007 (24-valve)
Install Notes
- Block must be measured and bored/honed for correct piston-to-wall clearance.
- Confirm ring end gaps per service manual; install rings in correct orientation.
- Use proper plateau finish and cleanliness standards before assembly.
- Follow Cummins torque specs, lubrication, and break-in procedures.
Warranty
Interstate-McBee new engine parts are generally covered for 24 months from installation under normal service (valve-train components may differ). Contact us for specific coverage details.
Cross-Reference & Alternatives
- OEM Cummins: 4089669 (STD), 4089670 (.020"), 4089671 (.040")
- Ring Set: 4089181 (.020")
Why Buy From CPP Diesel
- ESN/CPL-verified fitment support for Cummins B-Series.
- Fast shipping and easy returns.
- Pro-level tech tips for machine work and assembly.
FAQ
Does this fit all 2004.5–2007 5.9L Cummins trucks?Yes—this .020" kit targets the 2004.5–2007 5.9L ISB Common Rail era. Always confirm by ESN/CPL and your machine shop’s measurements before ordering.
What comes in one kit?
One cylinder’s piston, complete ring set, wrist pin, and pin clips. Order six kits for a full engine replacement.
Is machine work required for .020" oversize?
Yes. Your block must be bored and honed to the correct oversize and finish. Verify all clearances per the Cummins service manual.
How does .020" compare to standard or .040"?
STD is OEM bore (Cummins 4089669). .020" is 0.50 mm over (this kit). .040" is 1.00 mm over (Cummins 4089671). Choose based on cylinder wear and machine shop recommendations.
Product Videos
Custom Field
YEAR 2004.5-2007
MAKE DODGE
ENGINE 5.9L
