yeah should of pointed out the weld on the right was done on a welding lathe and yes it was mig.I had to use 0.8 wire as thats the only stainless wire i had.It would of been better with 0.6 and amps and feed turned down.With pipes its sometimes easier to trigger pulse weld like i did as you get a uniform looking weld rather than overlaps from continious welding and stopping to rotate the work.I was more concerned about too much weld protruding on the inside of the exhaust.