Refer to the YouTube video below, and you will have a better understanding of the working principles of the catalytic converter and tailpipe. Thanks to Automotive System Description YITAMOTOR Nissan NV200 2.0L catalytic converter for 2013-2020. A directcertifications:OBD I , OBD-II , Federal EPA , Non-CARB, material:Stainless steel, restricted states:California, new york, colorado, maine, fitment type:Direct replacement, inlet type:2-bolt welded flange, outlet type:2-bolt welded flange, engine:2.0L, substrate:Ceramic, placement on vehicle:Front, placement on vehicle:Rear, oem part number:644072, 17353, 644100, warranty:5 years or 50,000 miles limited