MIG welding exhaust question

PORCUPINE CITY if you try that (GAP) with a wire feed brother! You'll leave all kinds of wire on your I.D. if not proficient in the technique? You could use a gap and some filler wire with wire feed, tacking every so often and coming back into it for just short runs? I love to slam them up TIGHT and run a TIG pass at a low enough amperage as to not key hole the joint. Use some GTAW 1/16" filler wire or grab some .035 GMAW just to get you through your starts and possibly stops. You don't need a Gorilla weld to join exhaust as long as it is not under strain! Meaning hung well with rubber isolators as needed. Nothing takes the beauty away from a nice exhaust system more than some Sheoty and unneccessary Gorilla Beads!