what would you go for?

Cheers

a 20vt

Can you make a manifold locally cheaper than you can buy/ship from Europe? There's a chap on the Evo Forum who has made a batch of manifold sat something like £350, is that not a more viable option?

If nothing else, get in touch with him and see what he had his manifolds made out of, don't think they were as thick as 4.5mm, but sure I read they were still thick enough to have lambda boss welded in if required

I am having a custom tubular manifold made up locally with external gate

I have a chioce of 316G Stainless schedule 10 pipe (2.7mm wall) or mild steel pipe schedule 40 (4.5mm wall)

I am leaning towards the SS as it looks better, is lighter (6kg instead of 8kg for the manifold approx), and is corrsion resistant so does need to be coated

However I know SS is more prone to cracking over time, anyone had experience with these materials in turbo manifolds

Given I do about 4k miles a year tops (ie not a daily driver) what would you go for?

Cheers