Premium stainless steel M18x1.5 straight universal mini catalyst sensor fitting designed for precision exhaust systems. High-grade 304 stainless steel construction ensures corrosion resistance and long-term durability in harsh environments. CNC-machined threads provide perfect sealing with oxygen sensors and catalytic converters. Compact design ideal for tight engine bays in cars, motorcycles, and small industrial equipment. Universal compatibility works with most O2 sensor brands including Bosch, Denso, and NTK. Professional-grade component for mechanics, auto shops, and performance tuning specialists. Mirror-polished surface prevents exhaust leaks and maintains proper airflow. Direct replacement part meeting OEM specifications for seamless integration. Includes integrated crush washer for vibration resistance at high RPM. Suitable for gasoline and diesel applications with temperature resistance up to 900°C.