Welding An Exhaust. It allows doing a great job by using MIG welding to fix the muffler. MIG is the most popular system of welding the exhaust because of how easy it is to do.
Just tack everything up unbult it then run full welds. So make sure before you give all the effort to weld. In this case it is recommended that an experienced person uses an electric welder.
Cheap Welder How to Flux Core Weld Exhaust Budget DIY Exhaust.
However you must take extra precaution to TIG weld your exhaust pipe. Stick welding exhaust will require some bit of ingenuity. So make sure before you give all the effort to weld. Look into a Miller or Lincoln Electric machine.