The O2 sensor fixture contains a miniature catalytic converter designed to work with your vehicle's emission system. If the main catalytic converter is damaged, this device helps reduce exhaust emissions and prevents the check engine light from illuminating due to catalyst efficiency issues. It allows the ECU to detect proper operation as if the original catalytic converter is still in place. When the catalytic converter is removed, the downstream O2 sensor may detect increased exhaust temperatures and unburned fuel, triggering a check engine light with diagnostic trouble codes such as P0420 or P0430, indicating low catalyst efficiency. This adapter can help address certain P0420 code issues related to catalyst performance. Features: - Precision-machined threads using specialized tools for accurate fitment - Durable construction with high-quality metal materials resistant to deformation and rust - Universal fit for most vehicles with M18 x 1.5 O2 sensor threading - High strength and long-lasting durability - Simple installation with direct bolt-on design Condition: New Type: O2 Sensor Spacer Thread Size: M18 x 1.5 Dimensions: Approximately 1.85 x 0.98 x 1.18 inches Material: Metal Color: Silver Package Includes: 10 x Oxygen Sensor Spacers Note: The package includes only the items listed. Other accessories are not included. Note: Lighting and display settings may cause slight color variations between the product image and the actual item. Measurement tolerances may vary by +/- 1-3 cm.