O2 Oxygen Sensor Spacer Adapter Extender Oxygen Sensor Bung Extension Cel Fix Description: Check Engine Light fix is basically a way to space out the O2 sensor so that it still reads SOME exhaust gaes but it removes the O2 sensor from the direct flow of the gaes as to make the ECU believe there is a restriction in the exhaust gaes such as by a Catalytic Converter. Features *100% Brand New and High Quality *CEL Fix Check Engine Light Eliminator Adapter- O2 Sensor *Made from high-grade NICKEL plated steel *Simply threads into the existing bung *Length: 45mm Package Included: 1 x O2 Sensor Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightne of your monitor and light brightne. 2.Please allow slight manual measurement deviation for the data.