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have never seen a set of them in black before. All of the 3.6l or 3.8L X51 cast manifolds are raw casting. Those casting numbers do not always cross over to the part number. I would expect the first 9 numbers to be the beginning of the part number but the 1R and 0R are likely replaced by a two digit number in any Porsche parts diagram or PET software. I believe the 3.6L part number ends in a 40.
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