Evan Fischer SET-REPF960311 Catalytic Converter Set for 97-00 Ford Expedition 98 Navigator Left Right 5-year or 50,000-mile limited warranty Emission: 47-State Legal (Cannot Ship to CA or NY or ME) EPA N/TB6000/31075NN, N/TB6000/31075NN 2 Sensor Ports Single (2-bolt spinner flange) Inlet, Upstream and Downstream Oxygen Sensor Port Location