I have also done stainless exhaust, more specifically magnaflow, with ss wire and regular mig gas... turned out fine.
One tidbit I will point out, I have found that although it is stainless, magnaflow pipes (not the mufflers) are not a true 304...... they can't be..... unless i am completely out to lunch. Magnets stick to it, and on all the installs that we have done on year round vehicles, ie: trucks etc cat backs, they do tarnish/rust. The medical grade tubing we get for custom systems is actually not magnetic, and seems to hold out alot nicer.
That being said, I use magnaflow all the time and it is still stainless, and it looks great, especially when in fairweather vehicles!
Also, if your doing a kit, why go with some of the other brands when they are the same price for aluminized?>!?!?
Sorry to rant/go off topic!
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