Car Oxygen Sensor Spacer 90 Degree CEL Bung Fix for Check Engine Light M18X1.5 Catalytic Converter 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: Material: Iron Color: Silver Fitment: Universal Size: Approx.16mm/0.6in Approx.20mm/0.8in Package List: 1 x Oxygen Sensor Converter 1¡¢This O2 CEL repairment actually has a built?in micro catalytic converter, more reliable and efficient. 2¡¢Will help you get rid of the annoying inspection engine lights that are obtained after modifying the exhaust or removing the catalytic converter. 3¡¢After removing the catalytic converter, your rear O2 sensor will get higher temperature and greater unburned fuel flow. 4¡¢Made of high quality Iron materials, stable and durable in use. 5¡¢Easy installation, without any complicate and complex operations.