Cummins 4B/3.9/6B/5.9 4955872 Thrust Bearing Kit PAI 172059OEMCROSS REFERENCE: 4955872 3906452 3925919 3927770 3800330 3802082 APPLICATION: Cummins 4B 3. 9 6B 5. 9 DETAILS: Genuine Part OEM Number Description Quantity 4938953 UPPER THRUST MAIN BEARING 1 3901152 LOWER MAIN BEARING 1 BRAND: PAI 172059OEM Cummins 4955872 Thrust Bearing Kit PAI 172059OEM intended for replacement engine parts and heavy truck parts. Ensures proper axial support and prevents crank wear. All components are proudly manufactured in the U.