Exhaust header mockup

[rincewind23]

Hi all,

I am just working on mocking up the exhaust headers for my Rover v8. Following a couple of weeks of googling, I am working with 40mm OD plumbing pipe since most of the pages I found said that is the diameter that the metal headers should be. I've made the merge collector with a 50mm exit hole but that's not a fixed dimension right now (just how it happened to turn out)

Basically, I'm hoping the collective genius of the forums can give me some input on whether this header design looks ok? I'm not looking for equal-length headers or something that'll give me uber performance, but equally I'm not looking for something that's going to make the engine run really badly.

Cheers,
Kev.