[Good Quality]: This oxygen sensor adapter is made of high-quality stainless steel, which is strong and durable, not easy to rust, provides good sealing, is waterproof, resists high temperatures, and is very strong and durable, so the joint can be used for a long time. The thread is ground using special tools, with high precision and good repeatability. [Easy Installation]: The operation is simple and user-friendly. Just align the spiral pattern interface with the interface where the replacement parts are to be installed. [Special Design]: Built-in mini filtration network with mini catalyst, effective for CEL removal and P0420 fault code clearing. Threaded with special tools, perfect precision and repeatability. [Practical Function]: This lambda sensor eliminator extender is necessary if you use the HHO system or test tubes. It can also be used in car pipes for better fuel consumption. Increase the distance between the lambda sensor and the exhaust system. [Wide Range of