Looking into replacing my stock manifold with an aftermarket header. Besides the ZX route we apparently have 3 direct fit choices that I know of, Area P, Delkevic and Black Widow. I would probably be using an Akrapovic slip-on as my muffler.. I've searched and seen opinions on Area p and Delkevic but not Black Widow. Looking into opinions on build quality on any or all of them. Thank you.