The 6.4 calls for the small RP? Had you used that before? What's on there now? Even good filters can have defect, if this was the issue.
Yeah I see that is crazy, much smaller then the xg2 the 10060. I cant believe they put that on the 6.4. Hope isn't a strategy, but I hope this is the case. Can you see the butt plate on the filter? Is there 1/2 inch or so, the xg2 is .66 wider, if you can use that I would. Everything else should be good. I think hemimann used the 20-500 for this reason, sadly doubt that is still around. I can tell you that 10060 is a restrictive filter, even had a tsb, here is there clone to your filter..
The AMSOIL Ea15K50 filter warning, largely active around 2021, concerns potential low oil pressure issues, particularly in
2013-2018 RAM 1500/2500 trucks (5.7L/6.4L HEMI engines
This is a clone filter to rp10060.
@HEMIMANN what are his options for a larger filter?
Ebay has a couple/few rp20-500 for around 50 bucks. In this case I'd get one, because if this is the issue, you can rock on bypass it for future. Worth the squeeze if a filter terns out to be the issue. 20-500 for a run would verify. We know the 20-500 fits the 6.4.