Originally Posted by Irelands child
You can take the pipe sections to any muffler shop and they will "blow out" the pipe to fit over what you have and then either clamp or weld for a better connection
I believe a butt weld will be plenty strong. The hangers will be right in front of the butt weld so it only has to support the weight of 1 foot of pipe.
I really don't see why a butt weld wouldn't be as strong as the pipe itself anyway since I'll be removing the pipes so I can get a good weld all the way around the pipe.
I have V clamps at the rear of the mufflers so removing and re-installing them is a snap.