Another Or Same Header Question

[dmir55]

I think, of "big three" in headers, that equal length is the one you don't have worry about so much. It is important but sometimes impossible to make the tubes equal length. I think collector design and size is first, and primary tube size is a very very close second. And then comes primary length. Try to get the tube size to work your converter stall or your shift point drop in a stick. Hope this helps.