If the two outputs don't converge into one exhaust pipe you would have to choose one and go with it, Mike. Just be really careful to follow the instructions on where and how to locate the sensor. Another important point...don't leave the sensor in the pipe when it isn't in use. It will be ruined. If you're just using it occasionally to check A/F ratio, then take it out and plug the bung with a threaded plug. I suppose you could mount a bung in each pipe...usually they're mounted about 24 inches down. Interesting question the more I think about it. Possibly there is a way to mount two sensors and have them connect to the same gauge, but that seems a bit odd to me.
