10pc O2 Oxygen Sensor Exhaust Lambda Boss Nut Weld on in 304 Stainless M18x1.5
5Pair/10Pc M18 x 1.5 Exhaust Lambda Boss Nut Weld on in 304 Stainless O2 Oxygen Sensor Bung. -O2 Oxygen Sensor Bung+Plug Kit. -Easy to weld on. -Designed to adding a O2 sensor in any place you need.