Replacement Main Bearing Set for Cummins ® B/ISB/QSB Applications 0.25mm OEM Cross References: 4955856 Superseded/Alternate Numbers: M-3802011

What’s Included

Set – Main Bearing – 0.25mm | Cummins Engine | M-4955856

Set – Main Bearing – 0.25mm is an OEM-quality component designed for the Cummins diesel engine. Manufactured to meet or exceed original specifications, this part ensures reliable performance and long service life. OE reference: M-4955856.

Each product from HeavyDutyKits.com is backed by our commitment to quality and compatibility, helping mechanics and fleet operators maintain top efficiency.

Features:

• Direct-fit replacement for Cummins OE M-4955856
• Engineered for durability under high-load diesel conditions
• Ideal for rebuilds, maintenance, or performance upgrades

Order today from HeavyDutyKits.com ? your trusted source for heavy-duty diesel engine parts.

Application & Fitment

• Engine Make: Cummins
• Engine Model / Application: B/ISB/QSB

Confirm the original part number and engine identification before ordering. Where applicable, also verify serial-number range, production year, piston style, bearing size or other configuration notes shown in the product information.

Part Numbers & Cross References

• OEM Cross Reference: 4955856
• Alternate / Superseded: M-3802011
• Interstate-McBee Reference: M-4955856

Need Help Confirming Fitment?

Use the engine model, serial number and original part number when checking compatibility. For kits and sets, review the complete component breakdown above before ordering because contents can vary by engine configuration.