EQ still sells cast iron Magnum heads under the same part numbers, but they are no longer the bigger port head everyone liked for performance applications. They are another Chinese stock replacement style head. Anyone searching for EQ heads needs to know what they are looking at. The heads with large machined flats on the front and rear surface and no core plugs are the older better Australian or New Zealand castings that are excellent. The heads that look more factory and have core plugs in the front and rear surfaces with NO large flat machined surface are the Chinese version currently available.