I've installed the stacked cooler fins as well as a spin on atx external oil filter that BigJim mentioned awhile back......Uses standard oil filter such as for the engine. Easy to replace and I do it at every other oil engine change for the atx filter.....
The filter in the atx a standard poly substrate material. The problem is that the filter is not replaceable unless you take the atx apart. As miles build up and if the filter becomes clogged or restricts flow, there is a bypass feature that allows the oil to still circulate but alas it is no longer filtered....Ford gave an award to this company for designing this type of filter......I would have thought the best route would be to design a filter that is replaceable........oh well I guess the throw-away concept is at hand.
Bob