3950661 Cummins Connecting Rod Bearing For 6C 6CT 6CTA Engines

Product Brief:

This is the Connecting Rod Bearing latest active Genuine standard size connecting rod bearing set for Cummins C series 8.3L (6CT/6CTA/ISC8.3/QSC8.3). It is a drop-in replacement with improved overlay coating for higher cylinder pressure of electronic ISC engines.

Specification:

✅General heavy-duty land application,stationary generator sets,marine-specific anti-corrosion version

Why Choose US?

✅ Over 10 years experience as Cummins authorized agent, genuine parts guarantee

✅ Strict dimension control, stable oil film to prevent engine seizure under heavy load

✅ Ready stock, fast global shipment, competitive price for bulk order

✅ Professional technical support for engine overhaul & part matching

FAQ

Q1: What does the kit include?
A1: Full set of 12 pieces: 6 upper connecting rod bearings + 6 lower connecting rod bearings, complete for one 6-cylinder engine. Sold as a full kit, not for separate piece sales.


Q2: Can 3950661 directly replace old 3901430?
A: Yes. It is a drop-in upgrade replacement. Outer dimension, wall thickness and mounting geometry stay the same. No crankshaft machining is needed for STD size. The upgrade only comes from improved overlay coating for higher pressure resistance

Q3: Is 3950661 available in oversize sizes?

A3: 3950661 is STD (0.00mm) only. Matching oversize rod bearings in this series:

- 3950662: +0.25mm
- 3950663: +0.50mm
- 3950664: +0.75mm
- 3950665: +1.00mm