Just get your bends from www.BurnsStainless.com if you are going to go that route... they are all mandrel bent, and usually an "A" Grade finish that polishes up nicely. I should also add, that if you've got any header building questions, those are the guys to ask!!
If you are wanting to bend tube yourself, (real tube) look to http://www.vansantent.com/tube_bending_machines.htm
headers, anyone interested?
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