4A-GE MK1 Engine Custom Turbo Manifold [Archive] - Toyota MR2 Message Board

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I am looking to make a turbo manifold for my motor. I am considering using weld els(steam pipe). I am unsure of what type of material to use. I have done a little research on this, like 4-5 pages deep on google. My options are mild steel or 304, maybe 321. I am shooting for around 225-250 hp, but that is a temporary number and I know I will want more down the road. I have yet to pick a turbo and manifold budget is around 400 dollars. Mild Steel sch 40 ceramic coated- From what I hear this