1. This O2 sensor adapter is designed to work with your vehicle's emission system and helps address engine check lights that may appear after exhaust modifications, including the removal or replacement of the catalytic converter, or when installing a high-flow catalytic converter. 2. The device contains a built-in mini catalyst element that conditions the exhaust signal to help maintain proper sensor readings. 3. This O2 sensor adapter is intended to assist in maintaining compatibility with the vehicle’s ECU by simulating the expected oxygen storage capacity of a factory catalytic converter. When the catalytic converter is removed, the downstream oxygen sensor may detect changes in temperature and oxygen levels, which can lead to error codes. 4. Common diagnostic trouble codes such as P0420 or P0430 may be triggered under these conditions. This product is designed for off-road use only and is not intended for use on vehicles driven on public roads. Specification: Product name: Car oxygen O2 sensor adapter Product size: As shown Product color: As shown Product material: Metal Thread specification: M18 x 1.5 Packing list: Adapter * 1 Package weight: 40g Note: All images are professionally edited. Due to variations in lighting and display settings, there may be slight differences between the product images and the actual item. Measurements are taken manually and may have minor deviations, which do not affect functionality.