The guy on corral that I bought mine from his name was V6Sprout, he is out of Canada. I know for a fact I have seen a few people on the DIY forums on turbomustangs.com weld aluminum to mild steel. It didnt look like a great bead, but it held up with the rigors of the charge pipe. Actually to come to think about it, the guy was welding aluminum pipe to a flex exhaust.