I have been asking the following question for quite some time. How do the owners of an adjustable exhaust system manage it if the gentlemen of the office want to carry out a measurement? I can’t imagine, at the best, that the system is driven consistently in the place and only outside then open. In case of a check you ask for a little patience until you have brought the story to the proper state? If you have the possibility with a rich sound you I think everyone will use it to crush the world’s history. And so I assume that it is usually driven in an open state anyway. Or? I’m informed that there are in the meantime el. variable systems that can be operated during the journey. However, I don’t think they are. nnnn