WATER PUMP FOR CUMMINS ISX 2005& UP 5406043RX
3683652
3684449 
 PLEASE SEND ENGINE SERIAL SO WE CAN CONFIRM
no core charge
 this water pump is upgraded model as cummins oem
(they  recommend to change connecting coolant pipe to EGR cooler it is new  design ) but you don't have to replace coolant pipe old one will work  just fine save money .
included in box is parts 1,3,4,5 look on picture
1   3678724 Y Seal, O Ring 1
3   3683653 Y Housing, Water Pump Volute 1  
4   3684384 Y Seal, O Ring 1 
5   3683651
3684450  Y Core, Water Pump 1  
FREE UPS FOR lower 48 states