My opinion is for a car that sees a lot of driving or track time I feel cast is best. Even though it looks no where near as pretty and doesn't perform as well as a good header they are less prone to cracking. Even the best headers sooner or later crack. it's the nature of expansion and contraction. now days a lot of cast manifolds flow equally as good too. I agree some tubular long tubes would look nicer but to each is their own.
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