The O2 sensor fixture contains a miniature catalytic converter designed to help reduce exhaust emissions. It can assist in preventing the check engine light from illuminating due to catalytic converter efficiency issues. This device is engineered to work with the vehicle's ECU to simulate the presence of a functioning catalytic converter. When the original catalytic converter is removed, the rear O2 sensor may detect increased temperatures and unburned fuel, which can trigger a check engine light with diagnostic trouble codes such as P0420 or P0430. This unit helps address these specific fault codes related to catalyst system efficiency. Some check engine light alerts may also stem from O2 sensor performance issues, which can generate additional error codes. The CEL eliminator (commonly referred to as a mini cat) is designed to help resolve certain P0420 code instances caused by perceived catalytic converter inefficiency. Features: - Precision-machined threads for accurate fitment - Durable metal construction resistant to deformation and corrosion - Universal fit for most vehicles with M18 x 1.5 O2 sensors - High-quality, high-strength materials for long-term use - Simple installation with direct mounting design Condition: New Type: O2 Sensor Spacer Thread: M18 x 1.5 Size: Approximately 1.85 x 0.98 x 1.18 inches Material: Metal Color: Silver Package Contents: 10 x Oxygen Sensor Spacers Note: The package includes only the items listed above. Other accessories are not included. Variations in lighting and display settings may cause slight differences in color representation between the image and the actual product. Measurement tolerances may vary by +/- 1–3 cm.