Power Surge,
We are currently working on making our own headers. We just bought a mandrel bender and will start learning how to use it this next week. I imagine it will take us a couple of months, however, to figure out how to make nice pipes. I know it is a very difficult job to make them nice. So don't anyone hold their breath! This is a field I have never ventured into before.
Suprisingly, 321 stainless has one of the lowest thermal transfers of any material. As for the low percentages of chrome, or any other alloying agent, you would be amazed at what a little bit of some things can do. Such as carbon in steel. The addition of 0.8% carbon, (less than 1 percent), will make mild steel so hard they use it for razor blades. The addition of 0.5% carbon makes normal mild steel good enough for most mass produced connecting rods in cars.
David
