PAIR OF BOSCH POST CATALYTIC OXYGEN O2 SENSORS TO SUIT HOLDEN ONE TONNER VZ ALLOYTEC LE0 3.6L V6Post cat O2 sensors are manufactured utilizing proven OE technology and are guaranteed to provide durable and efficient performance. The Post catalytic oxygen sensor is located after the catalytic converter and monitors its efficiency by comparing the exhaust that flows into the and out of the converter. This sensor ensures the lowest possible output of environmentally harmful engine emissions. These post cat oxygen sensors suit Holden vehicles fitted