Mini-catalytic Converter Sensor Automotive Accessories Mini-catalytic Converter Specifications:: 5.8*2.5cm Wire: M18 × one point five Features:: This O2 cel fix actually has a built-in micro catalytic converter, which will help the annoying engine check light that appears after modifying the exhaust device or removing the catalytic converter, and sometimes even when installing the high- catalytic converter. Don't risk using extensions because they often don't work. This is the built-in real mini catalytic converter. This O2 cel with mini cat will induce your ECU to think that the standby catalytic converter is still installed. When you remove the catalytic converter, the rear O2 sensor will see higher temperature and greater unburned fuel. As a result, this will the check engine lamp (Cel, DTC), and the error code is usually P0420 ( system efficiency is lower than threshold group 1) and/or P0430 P0420 - system efficiency is lower than threshold group 2). Off-road use Our 180-degree O2 sensor plug mini catalytic converter is made of metal. Built-in M18X1.5 catalytic converter helps annoying engine inspection light Package Included:: 4 X oxygen sensor. Convenience: The product is easy to use, small, convenient to store and easy to carry High quality: The product is made of Zinc Plated Steel materials, durable, and will not be easily damaged or cracked during use Size: The product size belongs to the regular size, please check the product size carefully, size: M18*1.5 Length: 2.27"(58 mm) Function: The product has good functions and high quality, which increases the comfort and convenience of your car and makes you more enjoy the driving process Satisfaction Guarantee: Please check the size, type and shape of the product picture before buying to ensure that the product is suitable for you