5 Pairs O2 Oxygen Sensor Exhaust Lambda Boss Nut & Plug Weld-on 304 M18 x 1.5
Universal fit for STANDARD OXYGEN SENSORS with M18 X 1.5 Thread. -O2 Oxygen Sensor Bung+Plug Kit. 5x Oxygen Sensor Nut Bung Stepped. -Easy to weld on. -Designed to adding a O2 sensor in any place you need.