New Diesel Fuel Injection Pump 0460424289 for Cummins Engine 4BT 3.9L 3963961 US. For Cummins 4BT 3.9L. Because the warehouse and technical staff need to check the specific information. If you choose other reasons to return, the processing time will be longer. Because we need to consult technical personnel and warehouse personnel, sometimes the response of customer service may not be timely, please wait for a while, we will respond to you as soon as possible. Please do not leave a negative comment without contacting us, as this is not what we want from each other. Thank you for your kind understanding.