The short answer is no. If you use a filter not cataloged for the application, there is no warranty. So if you had an issue with a failure, you are on your own. Every filter company has the same policy. There are a significant differences in the o ring between the XG5 and XG9100. That said, why not use the HP4? It is still 94% efficiency at 20 microns, the XG is 99, splitting hairs there on a clean engine that is well maintained. And, it is never a good idea to block off a bypass valve.