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Although Offenhauser never made a 2x2 intake for the Buick Nailhead engine, part number 3413 (3x2 manifold for 1953-1956 Buick Nailhead) was designed to be used as a 2x2 manifold by blocking off the center carburetor with part number 1097 (3 bolt carburetor block off plate). Dan at White Owl Speed Equipment has the manifold and block off plate. He can be reached at email@example.com or by calling 559-786-1864.