New Engine Oil Pump 3634640 AR12387 For Cummins K38 KTA38 Diesel Engine. For Cummins K38 KTA38 Diesel Engine. E, we will guide you free of charge! Due to the color difference of the display, the received items may be a little different from the color on the picture, please know in advance! Please make sure it is correct. If you don’t receive package over 30 business workdays, please notify us. We believe our items are so outstanding. All products are quality checked. Otherwise deal is final. We will be happy to resolve any issues you may have in a cordial and friendly manner. We appreciate your Postive Feedback, and will do the same in return.