Set Of 2 Inlet+Outlet Nox Sensors For Cummins Diesel Engine 4326874RX 4326870 US. Original Part For Your Cummins Engine. 5WK96740B;3687930, 5101;2872944,4326870. Original Part, Superior Quality, No Extra Work Required. Installation Manual Is NOT Included. Professional Installation Is Highly RecommendedNote. 1 X Nox Sensor 4326870. 1 X 12V NOX SENSOR 5WK9 4326874RX. The package will be sent to the receiving address you set. Please leaving correct address will minimize delay. If you need return, let us know the detailed. Problem and send us some pictures for confirmation. We strive to satisfy every customer. We will do our best to solve your problem. We will do everything we can to give you a satisfying solution. We do our best to resolve any issue. Leaving negative feedbacks and low ratings doesn’t get things solved. So please talk with us and we will not let you down.