Baldwin PF7977 fuel filters
Guys, I just went to the Baldwin website to look up my local vendor and while I was there I cross referenced the subject filter into an OEM filter and it crossed over to a Fleetguard/Cummins FS19800. If memory serves me right the FS19800 is a 7 micron filter. One probable reason why the manufacturers aren't making a 2 or 5 micron filter for our engines could be the fuel filter canister installed on the engine is pretty small to have a 2 or 5 micron filter installed in it and wouldn't have much dirt holding capacity or life. That's why the filter GDP sells is roughly twice the physical size of our engine mounted filter, so the dirt holding capacity and life of the filter is greater. All this discussion about filters doesn't even take in to account the pressure drop through the respective filter which is a major concern, especially to a truck that is producing more than stock horsepower. Obviously a filter with more filter area will have a smaller pressure drop for any given micron size.
One additional item to be aware of is manufacturers often test their filters by different SAE test methods, so unless competing filters are tested to the same SAE test the information presented may be somewhat confusing.
Just my two cents... ... ... ... Lektrikman