Review on 🏍️ Innovate Motorsports 3835: Motorcycle O2 Bung Adapter, 12mm to 18mm Conversion - Enhance Your Bike's Performance! by Treyshaun Clena

I bought this to use an 18mm wide range O2 sensor which now has my 12mm -Narrow band O2 sensor is mounted. Since I only use the wideband sensor to collect AFR data during tuning, I didn't bother to adapt my exhaust to the 18mm thread size. This provides a solution and seems accurate enough for what I'm doing. Unlike other reviewers, my threading matches the 12mm exhaust plugs perfectly.