I replaced my waterpump a couple weeks ago. When I saw the condition of this composite impeller, I realized why porsche doesn't us metal. I replaced this waterpump with a Napa rebuild. My goal was to get a waterpump with a composite impeller and a lifetime warranty. I would have preferred a "new pump", but, the rebuild sold by Napa (remanufactured by Cardone) is what met my criteria.
