I only have the OEM ring, so that's good. As far as I know, my old sending unit was still working when I removed the old tank. I just thought it was a good idea to replace it with a new one. I got the new one at the Chrysler Classic at Norwalk. I would hope that the vendor was a reputable one. It's been a while, so I really don't remember who it was, but they are a large vendor of Mopar parts.