Drone was one of my concerns too with the straight thru muffler. But due to Winter, I still have a few months before I can take it for a test drive. Since I had the time, I found a way to add them now when it is more convenient.

The Challenger does not have a lot of room to just bolt in a standard 12" resonator. I could have gone longer if I removed the bushings and welded them in, but my goal was to make it removable in the case that I wanted to go with a larger diameter unit later on.

It appears that The Cudas seem to have even less space in this area than the Challengers.