I am thinking about including another set of mufflers into my db/dyno tests. I will need to cut off the existing muffler and then attach the new ones. However, i dont own a tig welder and was wondering if there is a way to clamp a muffler onto the existing tube. Is it possible to expand the new muffler end sections with an expansion tool and then clamp them onto the existing pipe sections(front and tailpipe)?? Or, should i just go ahead and plan on welding them??