This is from my automatic Cummins 6.7 Ram. No idea how long it was in there, so I changed it just to be on the safe side. Turns out to have been good judgement, because it was kinda ugly. This filter system uses a large filter on the outside to catch larger particles, and then a 5-micron filter on the inside, to catch smaller particles. Seems to work pretty well, but I'm going to put a big CAT 2-micron filter under the frame anyway to really keep the crud away from the injectors. Filter-out-of-filter: Can't play with these injectors, so I'm doing everything I can to keep them happy.