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Sanderson Headers. Got them for mine, never disappointed with them. They have a special flange that seals very well with no gaskets. They are available with ceramic coatings.
I bought some from Speedway. Very nice heavy gauge 1 5/8" primaries with ceramic coating for $229. The downside is, they're not made in USA like the Sandersen Headers. The Sandersen headers also hug the block tighter if space is a big concern to you. The only reason I didn't go with the Sandersen headers, they were only available with 1 1/2" primaries.
