I’m having trouble finding a good spot for an additional O2 bung on my 05. I have sport bracing, so that makes life a little harder. I have to keep things stock and switchable for at least another year.
This is why I can’t just remove the stock O2 sensor when I want to switch from MS.
Its not only for emissions testing, but also because I’m not the only driver of this car.

Where would a good spot be to weld in a new bung into the stock nb2 system without hitting the bracing or compromising the sensor’s ability to avoid moisture build up.