Our Notched Style O2 Bung is perfect for adding an O2 Sensor to any custom exhaust. These O2 bungs are made from 1018 steel and are ready to weld. Measures 1"x.5" and notched for a 3" exhaust pipe with a M18x1.5 RH Threads.
Part Number: B4WO2M18
In Stock & ready to ship.