and high quality Made of high quality material, durable and practical to use Built in miniature catalytic converter and will help reduce the check engine light that may occur after modifying your exhaust or removing your catalytic converter, and sometimes even when installing a high flow catalytic converter Don't take a chance on using an extension only as often they do not work; this is a real mini catalytic converter built into it When you remove your catalytic converter, your post O2 sensor will detect higher temperatures and greater flow of unburned fuel As a result, this may trigger check engine lights (CEL, SES, DTC), typically the error codes will be P0420 (Catalyst System Efficiency Below Threshold Bank 1) and/or P0430 (Catalyst System Efficiency Below Threshold Bank 2) For off-road use only Material: SS304, stainless steel filter mesh Thread: M18*1.5 Package Contents: 1/2/4/10 * Oxygen Sensor Adapter Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness Structured by SS304 stainless steel filter mesh for sturdy, durable, anti-rust and corrosion resistance