Usage Tips:[Good Quality]: This oxygen sensor adapter is made of high-quality stainless steel, which is strong and durable, not easy to rust, ensures good sealing, is waterproof, high temperature resistant and is very strong and durable, so the seal can be used for a long time. The thread is ground using special tools, with high precision and good repeatability. [Easy Installation]: Operation is simple and user-friendly. Simply align the interface of the spiral pattern with the interface where the spare parts are to be installed. [Special Design]: Built-in mini filtration network with mini catalyst, effective for removal of the CEL and the removal of the error code P0420. Thread with special tooling, perfect precision and repeatability. [Practical Function]: This lambda probe eliminator extender is necessary if you use the HHO system or test tubes. It can also be used in car pipes for better fuel mileage. Increase the distance between the lambda sensor and the exhaust system. [Wide Range of Applications]: This oxygen sensor is a universal 18mm threaded socket that fits most vehicles with M18 x 1.5 holes for oxygen sensors. It applies to most modern vehicles and easily screws into upstream and downstream O2 sensors and car exhaust pipes, and fits the threaded sockets or tools of most sensors of O2 in cars.