It has a metal impeller. Mopar uses a plastic impeller. Casting is average. But I think it's enough for a long life. The hole was not concentric with the ground. Not that it matters much, but it does give a sense of craftsmanship and quality control. I'll write another review if this thing dies before the 5 year warranty is up, which is a long time for a water pump. Everything else came and went.
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