Verocious Motorsports 304 Stainless Steel O2 Sensor Bungs feature M18 x 1.5 Thread to accommodate all standard OEM and Wideband O2 Sensors. Our Angled Oxygen Sensor Bungs measure in at 1" diameter are cut at a 45 degree angle and coped to fit the contour of 2.5" diameter tubing, but will easily work with other diameters. These high quality O2 bungs can be used on everything from custom downpipes to a quick repair on an OEM exhaust system. Available as single units and in sets of 5, 25, or 100. Buy in bulk and save!