Stainless Steel weld

How do you produce this kinds of welds.I have 304SS tubing.We want this look on our exhaust tubing.I know its tig welded, what filler rod is used.I had some exhaust welded and its not even close to the way this looks.
http://www.millerwelds.com/products/...ty_200_series/
The DX version of those help produce prettier welds because of all the control you have over everything.


