A few months back I picked up a gas MIG from HF a big tank of co2/argon, and did my friends exhaust on his turbo 318is. Things went well, but we never could get it to work all day on one setting. We were always walking around the power range, and tinkering with the speed. This is likely due to temperature changes in the metal, and alloy differences between our mandrel bends, and straight tube. These are the same problems I had, and my welds will most likely require some grinding before I paint her black, but such is life. The total cost will be somewhere around $120, not including the headers, and downpipe from IAS.
I decided to reuse the stock rear mounts, and mount my Dynomax bullet up front near the stock spring mount. I will be using a stock spring mount up front, and out back I have welded on rubber bolt mounted hangers which fit perfectly, and should keep the resonation out of the chassis.
Resonation there will be because at first I am trying the exhaust with just the Dynomax Bullet. there are provisions for mounting a baffled muffler out back before my tip, and that will likely have to be done to make the car bearable for cruises to the dog park with the wife, and keeping up with neighborly relations in our town home complex.
Here are some pictures of the current progress. Making the bend over the axle was somewhat difficult, but not impossible. There were a few locations where I ended up cutting some slight angles on my mandrels to make it line up where I wanted it. This would have been much easier with 2" tube, but in the event that the car sees positive intake manifold pressure in the future, I want to be prepared.
They will say 'I couldn't do half this good'. If only they knew I was going for twice as good as what there seeing... 
