A lot of the aftermarket exhaust systems (pipes and mufflers) come with both 12 mm and 18mm bungs. You plug the ones you do not use. If you replace your pipes, check for that. Once you have the 18mm, you can add the Auto Tune Pro to your Power Vision. That will give you more control than the basic that comes with the PV. The basic uses your existing O2 sensors, which are narrow band. The Pro comes with wide band Bosch sensors, but as mentioned, they are 18mm.
In theory, Theory and Reality are the same. In reality, they are different.
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