hmmm,,wonder if i candig up a filter at work,,,,hmmm ,,,ikept my old a1 style filter mount,,im gonna see if i can cross up a vw/boschfilter to a cat one,,,for reference, if i remember,i believe a fram ph3522 is the one for a rabbit diesel,,whichif you dosome looking ,this is also the "same " filter for something like a bread truck with a 4b cummins in it,kohler gen sets with 4b's also use that filter,,and its for the single filter setup,,some are dualspin ons,, most 4b's witha single filter would probably callfor a fram ph3522,helliknow we have some cat filters in stock too,,just gotta find one with the right threads,,,,ibet they have one,,i wonder if a fleetgard would be ok too,,,,,,,,,the "correct" one for a cummins,,,,