The Hauck husher comes with an intermediate pipe that is bent perfect to fit a car muffler with offset inlet and center outlet. I found several car mufflers that would fit. If I remember correctly the muffler had to be < 13" long. I tried the welded Thrush and a turbo muffler. I thought the turbo muffler gave a great deep tone, but it was louder than the Hauck.
There was a hesitation on low end, but I did not think it was anymore than what I had with the Hauck exhaust.