Features: This O2 CEL repairment actually has a built-in micro catalytic converter, more reliable and efficient. Will help you get rid of the annoying inspection engine lights that are obtained after modifying the exhaust or removing the catalytic converter. After removing the catalytic converter, your rear O2 sensor will get higher temperature and greater unburned fuel flow. Made of high quality Iron materials, stable and durable in use. Easy installation, without any complicate and complex operations. Specification: Condition: new Material: Iron Color: Silver Fitment: Universal Size: Approx.16mm/0.6in Approx.20mm/0.8in Package List: 1 x Oxygen Sensor Converter 1This O2 CEL repairment actually has a built?in micro catalytic converter, more reliable and efficient. 2Will help you get rid of the annoying inspection engine lights that are obtained after modifying the exhaust or removing the catalytic converter. 3After removing the catalytic converter, your rear O2 sensor will get higher temperature and greater unburned fuel flow. 4Made of high quality Iron materials, stable and durable in use. 5Easy installation, without any complicate and complex operations.