What type of metal is used for exhaust systems?

[CSoliz]

I want to make my own exhaust system. I am an electrician by trade and we have a pipe bender on our job. I am going to take my electrical bender home and bend up my exhaust using 1/2" EMT and take it too work and match the bends in 2". I plan on using good ol' cherry bombs with 2" inlets and outlets. So I have a couple of questions.... What type of tubing should I buy for the exhaust? And, anybody have any ideas on flaring the end of the tubing so it fits over the muffler ends? Or is there I double ended female fitting I could use. Please excuse my uncertainty, mis-use of terms or lack of knowledge on material used in making exhaust systems. This will be my first go at it and I can use all the answers I can get.


Thanks.



Chris S.