I am looking at getting a new muffler for the 3W-75. I have the Johnson standard pitts muffler on it now and the mounting is a bad design and is not working very well(the bolts come loose and brake all the time). Another reason for replacing it is because something has come loose inside the can and it is making some wicked noises.

I was looking at the Supersonic mufflers on AI and they look like a good design and a better muffler for the same price as the Johnson.

How does the noise and the performance compare?

Thanks, Brian