2 pairs O2 Exhaust Lambda Oxygen Sensor Boss Nut M18 x 1.5 Nut & Cap Bung Kits..
Universal fit for STANDARD OXYGEN SENSORS with M18 X 1.5 Thread. -O2 Oxygen Sensor Bung+Plug Kit. 2x Oxygen Sensor Nut Bung Stepped. -Designed to adding a O2 sensor in any place you need. For Oxygen Sensor.