*100% brand new and high quality *Made of high quality material, durable and practical to use *Built in miniature catalytic converter and will help get rid of that announcing check engine light you get 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 see higher temperatures and greater flow of un-burnt fuel *As a result this will throw check engine lights (Cel, SES, DTC) typically the error codes will be P0420 (Catalyst System Efficiency Below Threshold Bank 1) and/or P0430 P0420.Catalyst System Efficiency Below Threshold Bank 2). Fit for OFF ROAD 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. *Built in miniature catalytic converter and will help get rid of that announcing check engine light you get 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 *Structured by SS304. Stainless Steel Filter Mesh for sturdy, durable, anti rust-corrosion. *When you remove your catalytic converter, your post O2 sensor will see higher temperatures and greater flow of un-burnt fuel *As a result this will throw check engine lights (Cel, SES, DTC) typically the error codes will be P0420 (Catalyst System Efficiency Below Threshold Bank 1) and/or P0430 P0420.Catalyst System Efficiency Below Threshold Bank 2). Fit for OFF ROAD only