That used filter still looks pretty good. I have a PSI gauge on my final filter before the CP3.
I have yet to see my Baldwin filter clog up or my WIX that I can tell.
I had an 1R0750 as the tertiary next to the cp3 pump and it finally clogged after 10,000 miles, PSI dropped to 2.5
It is a very fine filter, I figure it caught enough of the little micron stuff the flow rate dropped.
At the tank the PSI is 7. When I changed the primary WIX 33118 large DD60 filter mounted on the frame rail next to tank, my final PSI did not change, so there was nothing wrong with it. And when I changed the PF7977 the PSI did not change
I think all I have to change is the very fine filter near the cp3
When I put on the new very large 416-1225 CAT, the final PSI is 5 psi