Stainless M18 x 1.5 O2 Oxygen Sensor Bung Exhaust Lambda Boss Nut Weld on in 304
Universal fit for STANDARD OXYGEN SENSORS with M18 X 1.5 Thread. -O2 Oxygen Sensor Bung+Plug Kit. 1x Oxygen Sensor Nut Bung Stepped. -Easy to weld on. -Designed to adding a O2 sensor in any place you need.