Brand new stainless steel O2 sensor weld-in bungs. Cut from 304 Stainless right here in the USA! This is will work with M18 x 1.5 thread type O2 sensors made by Denso, Bosch, NGK, and aftermarket sensors based on those designs. They also feature a nice chamfered edge!

Contact us for volume purchases, as we can work with you on shipping costs etc.