These minor blemishes are a natural part of the casting process when using the original sand casting tooling. Weiand Nostalgia series intakes are proudly cast and machined in the USA. We support all areas of the vintage, show, and nostalgia car hobby, and want to continue to produce these lower volume manifolds using the original tools. Please let us know of any issues you may have before leaving feedback so we have an opportunity to make things right. Check out the official Holley Performance.