A faulty Oxygen Sensor is a primary reason for Failure of a Catalytic Converter. Car Manufacturers Recommend Replacement of O2 Sensors at 60,000 miles. If you are purchasing a New Catalytic Converter be sure the Oxygen Sensors are Checked and Operating Correctly!
3.00 INLET X 3.00 OUTLET FORD TORPEDO UNIVERSAL CAT 2 AIR TUBE PORTS THESE ARE NOT O2 SENSOR PORTS UP TO GVW 15000 LBS EXCEPT VEHICLES REGISTERED IN CALIFORNIA OR NEW YORK WITH CA. EMM.