Good question. That's one of the reasons I left the Volvo manifolds on there when I bought the boat and replaced the risers. This time, both old risers and old manifold are Volvo OEM. The manifolds I've got to replace them are HGE Marine Engine Products, Chinese made, bought through Jerrys Marine. Looks like a bit thicker metal, but I'm a little worried,thought I was buying American made. New risers are Volvo. Looks like everything should fit together fine.
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