Interstate-McBee M-4089669 Piston Kit – Standard Bore – 04.5–07 5.9L Cummins 24V

OE-style aftermarket standard-bore piston kit purpose-built for the 2004.5–2007 Dodge Ram 2500/3500 with 5.9L Cummins 24-valve (ISB) common-rail. Precision components deliver reliable sealing and durability under heavy-duty use. Sold individually — order (6) kits for a complete engine set.

• Direct-fit replacement: Matches OEM Cummins 4089669 dimensions and performance.
• Complete kit: Includes piston, ring set, wrist pin, and pin retainers for straightforward assembly.
• Standard bore: 102 mm (4.016 in) for stock cylinder size; oversizes available separately.
• Aftermarket value: Interstate-McBee quality at a price point far below OEM boxed parts.

Specifications

Vehicle Fitment

Always verify by Engine Serial Number (ESN) for non-truck or industrial applications.

• Dodge Ram 2500/3500 — 2004.5, 2005, 2006, 2007 — 5.9L Cummins 24V ISB (common rail)
• Additional use: Select ISB/QSB 5.9 non-certified engines (ESN verification required)

Installation Notes

• Confirm cylinder size and finish; measure ring end-gap and piston-to-wall per Cummins spec.
• Observe pin orientation and bowl alignment; verify squish and protrusion.
• Follow the Cummins service manual for torque specs, clearances, and ring positioning.

Warranty

New Interstate-McBee engine parts are typically covered for 24 months from installation (valvetrain components may be 12 months). Contact us for current policy details.

Related/Recommended

• Piston Rings (STD): Interstate-McBee M-4089258
• Oversize Pistons: M-4089670 (.020), M-4089671 (.040)
• Main & rod bearings, head set, and in-chassis gasket set for full rebuilds

Why Buy From CPP Diesel

• Diesel-focused fitment expertise for Cummins B-series platforms
• Fast shipping and easy returns
• Real tech support—ESN verification available

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