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Can anyone tell me about the numbers I found on a set of aluminum 460 heads? There are 4 letters (CGET) grouped together and in a different spot PC3051-2011-01-07-0086. I have no idea who made these although it is suspected that they came from China. There are another set of stamped numbers, 1012KE3 which I think belong to the machinist or QC person, but that is another guess. Any help would be appreciated.