Reppunkamui
Well-Known Member
Aluminium is lighter than steel. Internal manifold is aluminium alloy of the engine block, vs the steel of the exhaust manifold.
As mentioned, I can't be sure about the flow, since to me it purely depends on the piping design of the internal manifold vs the steel manifold. Same size connections from cylinder to manifold and from manifold to turbo. B58M1 is an improvement over the B58M0 with more power, adding an exhaust flow restriction seems like an odd decision.
As mentioned, I can't be sure about the flow, since to me it purely depends on the piping design of the internal manifold vs the steel manifold. Same size connections from cylinder to manifold and from manifold to turbo. B58M1 is an improvement over the B58M0 with more power, adding an exhaust flow restriction seems like an odd decision.
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