Fuel Injector 0432133875 3919744 for Cummins 6BT5.9 4B3.9 Engine 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 and aftermarket parts, they should not be mixed. Replacing the entire set of injectors helps avoid potential issues.Replacement Part Number: 0432133875, 0-432-133-875, 3919744 Fit for Cummins Engine: 6BT5.9, 4B3.9