If it is a back- flow problem with our mufflers, I was thinking about cutting the top, gutting it and re welding it back up . I'm not to sure why we are getting rid of the mufflers. As for my patience, I took the man for his word of 8 to 10 weeks and we are not even to the tuning stage. Which is going to be another exercise in patience.
impatiently waiting
Bart