Cummins Fuel Injector 3977689 Compatible for Cummins Engine 4B3.9 6B5.9 B5.9

Applications:
Fit For Cummins Engine:4B3.9, B5.9, 6B5.9, B4.5, ISD4.5, ISB6.7, ISF3.8, B4.5s Condition: New Aftermarket Part Note: We recommend replacing the entire set of fuel injectors to ensure the engine's optimal performance. Due to differences in oil output and atomization concentration between genuine and aftermarket parts, they should not be mixed. Replacing the entire set of injectors helps avoid potential issues. Fuel Injector Nozzle Replace Part Number: SDLLA155M37670 Replace Part Number: 3977689