The old one was worn out after some 2500 hours on my Yanmar 4JH. I spoke to the manufacturer, and he told me about this new version. I still ordered the old style as I liked the ease of installation and it had served me well over the years. When I did some further research on-line someone commented that this new style cover plate is not as easy to install as the old one if the raw water pump is difficult to access, as it has multiple parts. On my boat the pump is under the alternator and is hard to reach, which is the main reason why I went with the Speedseal in the first place. I probably would have a hard time sliding this new cover plate with its additional two rings in place.