I have an Evo 26 with the stock side mount muffler. I am happy with the perfomance, but I am putting it into a new airplane. I would like to use a pitts muffler, but I am concerned about power loss.
So, the question is
Has anyone compare the performance of the stock side mount muffler(not the pipe) to the pitts muffler?

you will loose power. Check out www.mvvs.cz for rpm loss with different mufflers.

Thank You
This only shows the comparison between the tuned pipe and an older style pitts muffler. I don't think the side mount muffler was available for the MVVS

If you want more detailed info, why not contact Horizon?