where to find flanges
 

i am looking for the exhasut manifold flanges to build my self a header in 304 stainless. i ve search the web and could only find some in mild steel. anybody knows about a place to buy a set? i would like the center holes in 1.5 inch as well and not 1.75

I would say that's something you would want to do custom.

Search for a local Water jet or Lazer cutting company. I can help you out if you cant find it locally. Getting 304/321 stainless flanges is not easy, since the quality material are not cheap.

You're probably better off using mild steel for the flanges anyways.