2.5-inch No-Weld O2 Sensor Mount, Allows Users to Install O2 Sensor(s) Without Welding a Bung to Exhaust Pipe!
This is a great idea and it works perfectly! If you have an oxygen sensor for your wide band kit that you need to install, you have now found out that you have to find a welder who can drill the hole in your exhaust or down pipe, then weld in the bung. Sometimes, this has to be done off the car, so even more of a hassle.