When the threads corrode on a diesel particulate filter's NOx sensor, it usually means replacing the entire DPF assembly. This Dorman OE FIX weld-on NOx bung repair lets you directly repair only the damaged threads to cut repair costs. Product Features:Saves money - this NOx bung repair kit lets you replace just the damaged threads on your diesel particulate filter when servicing the NOx sensorCorrosion resistant - stainless steel construction keeps threads from easily corroding againApplication specific - designed specifically for Dodge Ram 2500 and 2500 trucks from 2014 to 2015Quality engineering - designed in the United States and backed by decades of automotive aftermarket experience