I've used them since they came out on my 97, and change every 6000. Supposed to have finer filtration, more dirt holding capacity, stronger case, and better filtration when cold. I don't have a Cummins shop nearby, but the Case-IH tractor dealer carries them. They're called "Micro-loc Ultra" & I think the number is J934430 or something like that. It's painted Cummins black w/silver lettering. You'll recognize it on the shelf. About $9. 75