FEULING OIL PUMP CORP. 12mm Oxygen Sensor - Rear - Twin Cam 9904

12mm Oxygen Sensor - Rear - Twin Cam Precision manufactured with a ceramic body made of stabilized zirconium dioxide, surface coated with gas-permeable platinum electrodes and a porous ceramic to help prevent erosion due to contamination and particulates in the exhaust gases, Slow reading oxygen sensors can cause a drop in fuel economy of 10-15%, excessive exhaust emissions and poor drivability, Meet or exceed OE specifications, Made in the U.S.A