Welcome to our shop 1. Constructed from stainless steel, ensuring durability and practicality. 2. Features a built-in mini catalyst, providing a reliable solution without the need for extensions. 3. Removal of the catalyst results in increased temperature and unburned fuel flow, triggering the check engine indicator light. (Off-road use only) 4. Specifically designed to address error codes such as p0420 and p0430, commonly associated with catalyst system efficiency below threshold. Specification: Size: Approximately 46.5x16mm Material: Stainless steel Thread: External thread M18 x 1.5, Internal thread M18 x 1.5, length 46.5mm Packing List: Oxygen O2 sensor x 1 Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.