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

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