Catalytic Converter Sensor Automotive Accessories Catalytic Converter M18X1.5 Thread Adapter Stainless Steel Specifications:: Material: SS304 and stainless steel Size: Hexagonal 23 mm, length 50 mm, thread M18*1.5 Features:: The program actually has a built-in micro catalytic converter, which will help to cause annoying engine inspection lights after modifying the exhaust system or removing the catalytic converter, sometimes even when installing a high catalytic converter. Don't take the risk of using extensions, as they usually don't work. This is a true built-in catalytic converter. This type of O2 cel will make your ECU think that the backup catalytic converter is still being installed. When you remove the catalytic converter, the rear oxygen sensor will see higher temperatures and more unburned fuel. Therefore, this will illuminate the check engine indicator light (Cel, DTC), with error codes typically P0420 (system efficiency below threshold group 1) and/or P0430 P0420- system efficiency below threshold group 2). Off road use Our 180 degree oxygen sensor plug catalytic converter is made of metal. The built-in M18X1.5 catalytic converter helps with annoying engine inspection lights Package Included:: 8 X oxygen sensor