Interstate-McBee M-3934048 Piston (Wrist) Pin – 94–02 5.9L Cummins

Premium aftermarket piston/wrist pin engineered to OEM dimensions for the 1994–2002 5.9L Cummins B-Series (12-valve & early 24-valve ISB). This 3" wrist pin restores correct piston-to-rod articulation and durability in stock or refreshed engines while delivering outstanding value versus OEM.

• Direct OEM cross: Replaces Cummins 3934048; common cross-ref 3901793.
• Correct geometry: Built to OEM specs for proper oiling and load distribution.
• 3" wrist pin format: Matches factory length used on B-Series 5.9L applications.
• Aftermarket value: Interstate-McBee quality at a lower price point than OEM.

Specifications

Vehicle Fitment

Always verify by engine serial number (ESN), especially on boundary years and industrial variants.

• Dodge Ram 2500/3500 – 5.9L Cummins
  • 1994–1998 12-Valve 6BT
  • 1998.5–2002 24-Valve ISB
• Notes: Also used on non-certified Power Gen 5.9L B-Series; check ESN for non-pickup applications.

What’s Included

• (1) Piston/Wrist Pin
• Related (sold separately): Wrist pin retaining clips (Cummins 3920691), pin bushings.

Install Notes

• Inspect piston and rod small-end bore; replace bushings as required and hone to spec.
• Confirm pin fit (press/float) per service manual; lubricate during assembly.
• Follow Cummins torque specs, sequences, and clearance checks.

Warranty

Interstate-McBee new engine components include manufacturer warranty coverage. Contact us for exact terms by part and application.

Cross-Reference

Cummins 3934048 (wrist pin); common cross 3901793. Functionally used across B/ISB 5.9L platforms where specified by ESN.

Why Buy From CPP Diesel

• Fitment help from real diesel techs (ESN verification available).
• Fast shipping, easy returns, and dependable customer support.
• Curated B-Series catalog to complete your bottom-end service in one order.

FAQ