This was my first impression of this manifold also, the roughness of the runners. In one respect it's not a wet flow. This would play havoc and cause fuel puddling. Part of the reason why a carburetor engine wants smooth runners. the remaining reason isa reduction vol. eff. Of cause you could polish out but for the money I would expect a better finish.
The other item is the finish on the outside, it does have a nice effect. but it will become a dirt collector, and a b!tch to clean.
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